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Bonding enhancement of cold rolling TA1 P-Ti/AA6061 composite plates via surface oxidation treatment
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作者 Lun FU Bin YANG +2 位作者 Yun-chang GUO Chao YU Hong XIAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2864-2880,共17页
TA1 P-Ti/AA6061 composite plate was produced by oxidizing the surface of the titanium plate and adopting a cold roll bonding process.The results revealed that the oxide film(Ti6O)prepared on the surface of TA1 pure ti... TA1 P-Ti/AA6061 composite plate was produced by oxidizing the surface of the titanium plate and adopting a cold roll bonding process.The results revealed that the oxide film(Ti6O)prepared on the surface of TA1 pure titanium was easy to crack during the cold roll bonding,thereby promoting the formation of an effective mechanical interlock at the interface,which can effectively reduce the minimum reduction rate of the composite plates produced by cold rolling of titanium and aluminium plates.Moreover,the composite plate subjected to oxidation treatment exhibited high shear strength,particularly at a 43%reduction rate,achieving a commendable value of 117 MPa.Based on oxidation treatment and different reduction rates,the annealed composite plates at temperatures of 400,450,and 500°C displayed favorable resistance to interface delamination,highlighting their remarkable strength-plasticity compatibility as evidenced by a maximum elongation of 31.845%. 展开更多
关键词 TA1 P-Ti/AA6061 composite plate oxidation treatment annealing treatment cold roll bonding
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Effect of thermo-mechanical treatment on microstructure and mechanical properties of wire-arc additively manufactured Al-Cu alloy
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作者 ZHANG Tao QIN Zhen-yang +2 位作者 GONG Hai WU Yun-xin CHEN Xin 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第7期2181-2193,共13页
Wire-arc additive manufacture(WAAM)has great potential for manufacturing of Al-Cu components.However,inferior mechanical properties of WAAM deposited material restrict its industrial application.Inter-layer cold rolli... Wire-arc additive manufacture(WAAM)has great potential for manufacturing of Al-Cu components.However,inferior mechanical properties of WAAM deposited material restrict its industrial application.Inter-layer cold rolling and thermo-mechanical heat treatment(T8)with pre-stretching deformation between solution and aging treatment were adopted in this study.Their effects on hardness,mechanical properties and microstructure were analyzed and compared to the conventional heat treatment(T6).The results show that cold rolling increases the hardness and strengths,which further increase with T8 treatment.The ultimate tensile strength(UTS)of 513 MPa and yield stress(YS)of 413 MPa can be obtained in the inter-layer cold-rolled sample with T8 treatment,which is much higher than that in the as-deposited samples.The cold-rolled samples show higher elongation than that of as-deposited ones due to significant elimination of porosity in cold rolling;while both the T6 and T8 treatments decrease the elongation.The cold rolling and pre-stretching deformation both contribute to the formation of dense and dispersive precipitatedθ′phases,which inhibits the dislocation movement and enhances the strengths;as a result,T8 treatment shows better strengthening effect than the T6 treatment.The strengthening mechanism was analyzed and it was mainly related to work hardening and precipitation strengthening. 展开更多
关键词 wire-arc additive manufacture inter-layer cold rolling thermal-mechanical treatment microstructure mechanical properties strengthening mechanism
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设限频域前馈板厚控制策略的研究 被引量:1
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作者 陈刚 王益群 +1 位作者 陈金龙 郭秀琴 《机床与液压》 北大核心 2015年第17期11-15,共5页
近年来随着板厚控制技术的发展,冷轧板带产品厚度精度有了显著提高,但现代化工业生产对板带产品厚度精度也提出了更高的要求,高精度冷轧板带仍需大量进口,所以深入研究如何进一步提高冷轧板带产品厚度精度具有重要意义。目前冷带轧机上... 近年来随着板厚控制技术的发展,冷轧板带产品厚度精度有了显著提高,但现代化工业生产对板带产品厚度精度也提出了更高的要求,高精度冷轧板带仍需大量进口,所以深入研究如何进一步提高冷轧板带产品厚度精度具有重要意义。目前冷带轧机上应用的厚控系统主要是反馈式控制方式,这种控制方式虽然具有稳定可靠的特性,但有控制时滞的缺点,严重影响控制精度的进一步提高,而前馈控制策略虽然在理论上可以弥补反馈控制时滞的缺点,但实际应用情况表明,传统前馈存在着诸多局限性,针对传统前馈控制的重叠和抗噪问题,综合提出设限频域前馈板厚控制策略,并结合"频域"涵义扩展的思想,给出了前馈控制设限频域范围的确定和实现方法,并进行了对比实验,实验结果证明了该控制策略的优越性。 展开更多
关键词 !冷轧 板厚控制 前馈 设限频域 小波滤波
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Effects of cold rolling and heat treatment on microstructure and mechanical properties of AA 5052 aluminum alloy 被引量:15
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作者 王博 陈先华 +2 位作者 潘复生 毛建军 方勇 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第8期2481-2489,共9页
The microstructures and mechanical properties of homogenized-rolled AA5052 aluminum alloys with different rolling reductions and following annealing treatments were investigated by optical microscope, scanning electro... The microstructures and mechanical properties of homogenized-rolled AA5052 aluminum alloys with different rolling reductions and following annealing treatments were investigated by optical microscope, scanning electron microscope, X-ray diffractometer, micro-hardness and tensile tests. The results show that with increasing rolling reduction, the equiaxed grains are elongated along the rolling direction obviously, and accumulation of rolling reduction increases the work hardening effect, which results in the enhanced strength and degraded plasticity. When rolling reduction is 87%, the ultimate tensile strength reaches 325 MPa but elongation is only 2.5%. There are much more secondary phase precipitates after annealing treatment. With an increase of annealing temperature, the amount of precipitates increases and work hardening diminishes continuously. The elongation is improved to ~23% but the tensile strength is decreased to 212 MPa after annealing at 300 °C for 4 h, which are comparable to those of as-homogenized alloy. 展开更多
关键词 AA5052 aluminum alloy cold rolling ANNEALING MICROSTRUCTURE mechanical properties
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Multilayered Ti-Al intermetallic sheets fabricated by cold rolling and annealing of titanium and aluminum foils 被引量:14
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作者 孙彦波 赵业青 +3 位作者 张迪 刘翠云 刁浩岩 马朝利 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第8期1722-1727,共6页
Multilayered Ti-Al based intermetallic sheets were fabricated by sintering alternately layered titanium and aluminum foils.The microstructure and phase formation of the obtained sheets under different sintering condit... Multilayered Ti-Al based intermetallic sheets were fabricated by sintering alternately layered titanium and aluminum foils.The microstructure and phase formation of the obtained sheets under different sintering conditions were evaluated by various techniques.The results reveal that when the sintering temperature is above the melting point of aluminum,the self-propagating high-temperature synthesis reaction occurs between Ti and Al,and forms various phases of Ti-based solid solutions including α-Ti Ti3Al,TiAl,TiAl2 and α-Ti including TiAl3,etc.When the sintering time increased,Ti-based solid solution,TiAl2 and TiAl3 disappeared gradually,and the sheet containing Ti3Al and TiAl phases in a multilayered structure formed finally.A lot of voids were also observed in the sintered structures,which were caused by the melting Al,Kirkendall effect and the difference of molar volumes between reactants and products.The voids were eliminated and a dense sample was obtained by the following hot press. 展开更多
关键词 multilayered composites Ti-Al based intermetallics self-propagating high-temperature synthesis voids cold rolling ANNEALING
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Effect of stacking fault energy on mechanical properties of ultrafine-grain Cu and Cu-Al alloy processed by cold-rolling 被引量:7
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作者 伞星源 梁晓光 +2 位作者 程莲萍 沈黎 朱心昆 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第4期819-824,共6页
Cu,Cu-2.2%Al and Cu-4.5%Al with stacking fault energies(SFE) of 78,35 and 7 mJ/m2 respectively were processed by cold-rolling(CR) at liquid nitrogen temperature(77 K) after hot-rolling.X-ray diffraction measurem... Cu,Cu-2.2%Al and Cu-4.5%Al with stacking fault energies(SFE) of 78,35 and 7 mJ/m2 respectively were processed by cold-rolling(CR) at liquid nitrogen temperature(77 K) after hot-rolling.X-ray diffraction measurements indicate that a decrease in SFE leads to a decrease in crystallite size but increase in microstrain,dislocation and twin densities of the CR processed samples.Tensile tests at room temperature indicate that as the stacking fault energy decreases,the strength and ductility increase.The results indicate that decreasing stacking fault energy is an optimum method to improve the ductility without loss of strength. 展开更多
关键词 CU Cu alloys COLD-ROLLING tensile tests stacking fault energy
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Strength enhancement of Mg-3Gd-1Zn alloy by cold rolling 被引量:6
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作者 吴迪 唐伟能 +1 位作者 陈荣石 韩恩厚 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期301-306,共6页
The severe cold rolling was employed to enhance strength of Mg-3Gd-lZn (mass fraction, %) alloy sheet. The 0.2% yield stress of the Mg-3Gd-1Zn hot-rolled sheet can be increased by 150% through the single-pass cold r... The severe cold rolling was employed to enhance strength of Mg-3Gd-lZn (mass fraction, %) alloy sheet. The 0.2% yield stress of the Mg-3Gd-1Zn hot-rolled sheet can be increased by 150% through the single-pass cold rolling with the reduction of 23%, due to the high intensity of dislocation and basal texture established during cold rolling. Compared with the Mg-3Gd-lZn hot-rolled sheet, the cold-rolled sheet annealed at 350 for 30 min may get an enhancement in strength without a great loss of ductility. The sheet processed by multi-pass cold rolling does not show a higher strength as expected, due to the softening effect of shear bands. However, the thin slab with the thickness less than 1 mm can be produced by the multi-pass cold rolling with the annealing treatment as few as possible. 展开更多
关键词 magnesium alloys cold rolling STRENGTH TEXTURE
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Effects of stress state on texture and microstructure in cold drawing-bulging of CP-Ti sheet 被引量:3
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作者 李宏伟 张下陆 +1 位作者 陈甲元 李金山 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期23-31,共9页
Three different stress states of the combination of tensile(t) stress and compressive(c) stress,t t,t c and t c c,exist in the deformed commercially pure titanium(CP-Ti) sheet during cold drawing-bulging.The tex... Three different stress states of the combination of tensile(t) stress and compressive(c) stress,t t,t c and t c c,exist in the deformed commercially pure titanium(CP-Ti) sheet during cold drawing-bulging.The textures and microstructures in the different stress state regions were investigated by means of XRD and TEM analysis.Similar development of texture and microstructure is achieved with less thickness strain under multiaxial stresses in drawing-bulging than in cold rolling.The results show that texture and microstructure are much sensitive to multiaxial stresses.Twinning is more easily activated under compressive stress than tensile stress.Prism a slip is heavily affected by tensile stress,resulting in a remarkable change of the intensity of(0°,35°,0°) texture,while pyramidal c+a slip,forming(20°,35°,30°) texture,weakens with the increase of thickness strain in spite of stress state. 展开更多
关键词 titanium alloy TEXTURE twinning MICROSTRUCTURE DRAWING stress state cold rolling drawing-bulging
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Deformation mechanism of cold ring rolling in view of texture evolution predicted by a newly proposed polycrystal plasticity model 被引量:3
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作者 李宏伟 冯璐 杨合 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第12期3729-3738,共10页
An explicit polycrystal plasticity model was proposed to investigate the deformation mechanism of cold ring rolling in view of texture evolution. The model was created by deducing a set of linear incremental controlli... An explicit polycrystal plasticity model was proposed to investigate the deformation mechanism of cold ring rolling in view of texture evolution. The model was created by deducing a set of linear incremental controlling equations within the framework of crystal plasticity theory. It was directly solved by a linear algorithm within a two-level procedure so that its efficiency and stability were guaranteed. A subroutine VUMAT for ABAQUS/Explicit was developed to combine this model with the 3D FE model of cold ring rolling. Results indicate that the model is reliable in predictions of stress-strain response and texture evolution in the dynamic complicated forming process; the shear strain in RD of the ring is the critical deformation mode according to the sharp Goss component ({110}?100?) of deformed ring; texture and crystallographic structure of the ring blank do not affect texture type of the deformed ring;texture evolves rapidly at the later stage of rolling, which results in a dramatically increasing deformation of the ring. 展开更多
关键词 cold ring rolling crystal plasticity texture evolution explicit algorithm
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Microstructure and mechanical properties of cryo-rolled AA6061 Al alloy 被引量:2
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作者 黄元春 颜徐宇 邱涛 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第1期12-18,共7页
The microstructure and mechanical properties of the age hardening AA6061 Al alloy subjected to cryo-rolling(CR) and room temperature rolling(RTR) treatments were investigated. The rolled and aged alloys were analy... The microstructure and mechanical properties of the age hardening AA6061 Al alloy subjected to cryo-rolling(CR) and room temperature rolling(RTR) treatments were investigated. The rolled and aged alloys were analyzed by using DSC, EBSD, TEM, Vickers hardness analysis and tensile test. The results show that the cryo-rolled treatment has an effect on the precipitation sequence of AA6061 Al alloy. The ultrafine grain structures are formed to promote the fine second phase particles to disperse in the aluminum matrix after the peak aging, which is attributed to lots of dislocations tangled in the rolling process. Therefore, the strength and ductility of AA6061 Al alloy are simultaneously modified after the cryo-rolling and aging treatment compared with room temperature rolled one. 展开更多
关键词 AA6061 Al alloy cryo-rolling ultrafine grain structure disperse distribution mechanical properties
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Microstructure and mechanical properties of cold-rolled Ti_(50)Ni_(47)Fe_3 shape memory alloy 被引量:1
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作者 李艳锋 康小宇 +2 位作者 尹向前 解浩峰 米绪军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第9期2890-2895,共6页
Mechanical and shape memory properties of a Ti50Ni47Fe3 alloy annealed at 450-750 °C for 1 h after a cold-rolled reduction of 25% were investigated by phase transformation analysis and microstructure characteriza... Mechanical and shape memory properties of a Ti50Ni47Fe3 alloy annealed at 450-750 °C for 1 h after a cold-rolled reduction of 25% were investigated by phase transformation analysis and microstructure characterization using tensile tests, Vickers hardness tests, electrical resistivity-temperature tests, SEM and TEM. From the results of the tensile, it can be inferred that the fracture stress and yield stress decreased and the fracture elongation increased as the annealing temperature increased for the rolled Ti50Ni47Fe3 alloy. They reached stead values when the temperature was above 650 °C. The change in Vickers hardness corresponded to the change in the fracture stress and yield stress. The electrical resistivity-temperature curves suggest that a two- stage martensitic transformation(B2-R-B19′) occurred during cooling and heating. The transformation temperatures decreased to lower temperatures when the annealing temperature was increased and maintained the same after the annealing temperature reached 650 °C. TEM revealed the distinct processes occurring at elevated temperatures: recovery, polygonization, and recrystallization. 展开更多
关键词 TiNiFe alloy shape memory alloy cold rolling MICROSTRUCTURE mechanical property
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Superplastic extensibility deformation of Al-3%Mn alloy with submicrometer grain size
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作者 肖旋 高慈 +1 位作者 侯介山 郭建亭 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第5期1035-1040,共6页
Submicrometer-grained (SMG) Al-3%Mn (mass fraction) alloy specimens with initial grain size of -0.3 μm were produced by ball milling for 3 h. The Al-3%Mn specimens which were cold rolled with a strain rate of 1&#... Submicrometer-grained (SMG) Al-3%Mn (mass fraction) alloy specimens with initial grain size of -0.3 μm were produced by ball milling for 3 h. The Al-3%Mn specimens which were cold rolled with a strain rate of 1×10^-3- 1×10^-2 s-1 at room temperature show high extensibility to failure more than 2500%. Microstructures of pure Al and Al-3%Mn alloy at as-milled and cold-rolled state were examined using X-ray diffraction and transmission electron microscopy (TEM). Based on the microstructure analysis, it is established that the mechanism of the continued plastic deformation in SMG Al-3%Mn alloy consists of dislocation slip, grain boundary sliding companied by dynamic recovery and recrystallization, and dynamic recrystallization is a main control factor of the large plastic deformation. 展开更多
关键词 aluminium alloys mechanical alloying cold rolling deformation structure
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Microstructure and textural evolution during cold rolling and annealing of commercially pure titanium sheet 被引量:17
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作者 Na LIU Ying WANG +4 位作者 Wei-jun HE Jun LI Adrien CHAPUIS Bai-feng LUAN Qing LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第6期1123-1131,共9页
The effects of cold rolling and annealing on the microstructure and textural evolution of a commercially pure titanium(CP-Ti) sheet were investigated. Electron backscatter diffractometry demonstrates that the deform... The effects of cold rolling and annealing on the microstructure and textural evolution of a commercially pure titanium(CP-Ti) sheet were investigated. Electron backscatter diffractometry demonstrates that the deformation during rolling is accommodated by twinning and slip. Additionally, twinning is the dominant deformation mechanism when the cold rolling reduction is less than 40%. During rolling, {11ˉ22}11ˉ2ˉ3contraction twinning(CT) and {10ˉ12}10ˉ11 extension twinning(ET) are activated. And, the intensity of the(0002) pole along the ND gradually increases with increasing deformation. During annealing, the fraction of low angle grain boundaries(LAGBs) and the intensity of the(0002) pole along the ND gradually decrease slightly with increasing annealing time, while twinning lamellae disappear rapidly. When the annealing time reaches 60 min, 20% cold-rolled sheet recrystallizes almost completely. 展开更多
关键词 commercially pure titanium texture TWINNING cold rolling RECRYSTALLIZATION
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Effect of thermomechanical processing on microstructure and mechanical properties of CoCrFeNiMn high entropy alloy 被引量:15
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作者 Jian-xin FU Cheng-ming CAO +1 位作者 Wei TONG Liang-ming PENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第5期931-938,共8页
The CoCrFeNiMn high entropy alloy was produced by homogenization, cold rolling and recrystallization. The effects of thermomechanical processing on microstructures and tensile properties at different temperatures were... The CoCrFeNiMn high entropy alloy was produced by homogenization, cold rolling and recrystallization. The effects of thermomechanical processing on microstructures and tensile properties at different temperatures were investigated using X-ray diffractometry(XRD), optical microscopy(OM), scanning electron microscopy(SEM) and multi-functional testing machine. The results show that dendritic structures in cast alloy evolve into equiaxed grains after being recrystallized, with single face-centered cubic(FCC) phase detected. The most refined alloys, stemming from the highest rolling ratio(40%), exhibit the highest strength due to the grain boundary strengthening, while the variation of elongation with temperature shows a concave feature. For the coarse-grained alloys, both the ductility and work hardening ability decrease monotonically with increasing temperature. Serrated flow observed at intermediate temperatures is attributed to the effective pinning of dislocations, which manifests the occurrence of dynamic strain hardening and results in the deterioration in ductility. Besides, dimples on the fracture surfaces indicate the typical ductile rupture mode. 展开更多
关键词 high entropy alloy cold rolling microstzucture tensile properties serrated flow
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Strength and structure variation of 2195 Al-Li alloy caused by different deformation processes of hot extrusion and cold-rolling 被引量:11
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作者 Yun-long MA Jin-feng LI +4 位作者 Run-zhe ZHANG Jian-guo TANG Cheng HUANG Hong-ying LI Zi-qiao ZHENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第4期835-849,共15页
2195 Al-Li alloy was deformed through extrusion followed by cold-rolling.The textures of the extruded plate and cold-rolled sheet after solutionization were investigated.The longitudinal strength and precipitates afte... 2195 Al-Li alloy was deformed through extrusion followed by cold-rolling.The textures of the extruded plate and cold-rolled sheet after solutionization were investigated.The longitudinal strength and precipitates after T8 aging were measured and observed,respectively.Compared to those in the sheet,T1(Al2 Cu Li)precipitates in the extruded plate after T8 aging are non-uniform,and their incubation time is shorter.The extruded plate after solutionization is not recrystallized and contains 55.28%deformation textures of Brass and S.In the cold-rolled sheet after solutionization,massive recrystallization occurs and S component disappears.Due to the higher fraction of Brass and S textures with higher Schmid factor and lower equivalent sliding system number,the extruded plate possesses an yield strength not higher or even lower,but a tensile strength higher,than the cold-rolled sheet after solutionization.In addition,during the aging after pre-stretch,these textures promote T1 precipitation on preferred sliding planes of cold-rolled sheet and cause its higher yield strength and tensile strength after T8 aging. 展开更多
关键词 Al-Li alloy COLD-ROLLING EXTRUSION TEXTURE PRECIPITATE STRENGTH
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Effect of rolling reduction and annealing process on microstructure and corrosion behavior of LZ91 alloy sheet 被引量:11
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作者 Li-na MA Yan YANG +4 位作者 Gang ZHOU Feng-juan REN Hong-ju DENG Guo-bing WEI Xiao-dong Peng 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第7期1816-1825,共10页
The effect of rolling reduction and annealing process on the microstructure and corrosion behavior of Mg-9Li-1Zn(LZ91) alloy was investigated. The test alloy sheets were cold rolled with the reduction of 50% and 75%, ... The effect of rolling reduction and annealing process on the microstructure and corrosion behavior of Mg-9Li-1Zn(LZ91) alloy was investigated. The test alloy sheets were cold rolled with the reduction of 50% and 75%, respectively, and then were annealed at 200 ℃ for 1 h. The microstructure of test alloys was observed by OM and SEM while the phase composition was determined by XRD. The corrosion property was evaluated by electrochemical measurements and immersion tests. The results show that LZ91 alloy sheet consists of α-Mg, β-Li and precipitated Mg-Li-Zn compounds(MgLi2Zn and MgLiZn phases). Dynamic recrystallization grains appear in β-Li phase during annealing process, leading to grain refinement. The results indicate that the increasing rolling reduction and performing the annealing process can enhance the corrosion resistance of LZ91 alloy. The 75% cold-rolled and annealed LZ91 alloy shows the best corrosion resistance. 展开更多
关键词 LZ91 alloy cold rolling ANNEALING MICROSTRUCTURE corrosion resistance
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δ-phase precipitation regularity of cold-rolled fine-grained GH4169 alloy plate and its effect on mechanical properties 被引量:9
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作者 Hao XUE Jing-qi ZHAO +2 位作者 Yong-kang LIU Chun-xiang ZHANG Jun-ting LUO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第12期3287-3295,共9页
Cold rolling and heat-treatment were used for the grain refinement of GH4169 superalloy plate.The effects of cold rolling reduction ratio and heat-treatment time on the precipitatedδphase,and the effects ofδ-phase c... Cold rolling and heat-treatment were used for the grain refinement of GH4169 superalloy plate.The effects of cold rolling reduction ratio and heat-treatment time on the precipitatedδphase,and the effects ofδ-phase content and morphology on the mechanical properties of the GH4169 alloy plates,are studied.The results demonstrate that coldrolling can promote the precipitation of theδphase and its transformation from theδ-Ni3Nb phase to theδ-NbNi4 phase.The comprehensive properties of the alloy are better when the heat treatment time is 1 h,with 132 MPa increase in the tensile strength and only 2.9%decrease in the elongation relative to those of the original material.The mechanical properties of the alloy are shown to change greatly with the change in theδ-phase morphology. 展开更多
关键词 fine-grained GH4169 alloy cold rolling δphase mechanical properties
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Improvement of strength and ductility of Al-Cu-Li alloy through cryogenic rolling followed by aging 被引量:8
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作者 Yan-jun DENG Guang-jie HUANG +4 位作者 Ling-fei CAO Xiao-dong WU Li HUANG Ming-yong XIA Qing LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第9期1920-1927,共8页
To develop an improved approach in achieving an excellent combination of high strength and ductility,the solutionized Al?Cu?Li plates were subjected to rolling at cryogenic and room temperatures,respectively,to a redu... To develop an improved approach in achieving an excellent combination of high strength and ductility,the solutionized Al?Cu?Li plates were subjected to rolling at cryogenic and room temperatures,respectively,to a reduction of83%,followed by aging treatment at160°C.The results indicate that Al?Cu?Li alloys through cryogenic rolling followed by aging treatment possess better mechanical properties.Rolling at cryogenic temperature produces a high density of dislocations because of the suppression of dynamic recovery,which in turn promotes the precipitation of T1(Al2CuLi)precipitates during aging.Such high density of T1precipitates enable effective dislocation pinning,leading to an increase in strength and ductility.In contrast,room temperature rolled alloys after aging treatment exhibit lower strength and ductility due to low density of T1precipitates in the grain interior and high density of T1precipitates around subgrain boundaries. 展开更多
关键词 Al-Cu-Li alloy cryogenic rolling DISLOCATION T1 precipitate
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Microstructure evolution and mechanical properties of Al−3.6Cu−1Li alloy via cryorolling and aging 被引量:10
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作者 Chang LI Han-qing XIONG +5 位作者 Laxman BHATTA Lin WANG Zhao-yang ZHANG Hui WANG Charlie KONG Hai-liang YU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第11期2904-2914,共11页
An Al−3.6Cu−1Li alloy was subjected to room temperature rolling and cryorolling to investigate their effects on microstructure evolution and mechanical properties.The microstructure and aging characteristics of the ro... An Al−3.6Cu−1Li alloy was subjected to room temperature rolling and cryorolling to investigate their effects on microstructure evolution and mechanical properties.The microstructure and aging characteristics of the room temperature-rolled and the cryorolled alloys with 70%and 90%of thickness reductions were studied by microstructure analysis and mechanical tests.The samples subjected to cryorolling with 90%of thickness reduction have high strength and good toughness.This is mainly due to the inhibition of dynamic recovery and the accumulation of high-density dislocations in cryorolled samples.In addition,the artificial aging reveals that the temperature at which peak hardness is attained is inversely proportional to the deformation amount and directly proportional to the rolling temperature.Moreover,bright field images of cryorolled samples after aging indicate the existence of T1(Al2CuLi)precipitates.This suggests that the high stored strain energy enhances the aging kinetics of the alloy,which further promotes the nucleation of T1 phases. 展开更多
关键词 Al−Cu−Li alloy CRYOROLLING AGING precipitation strengthening mechanical property
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Effect of pre-rolling path on mechanical properties of rolled ZK60 alloys 被引量:7
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作者 Bo SONG Zhi-wen DU +4 位作者 Qing-shan YANG Ning GUO Sheng-feng GUO Jin-cheng YU Ren-long XIN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第5期1322-1338,共17页
Pre-cold rolling with low reductions(<3%)was used to improve the mechanical properties of rolled ZK60 plates.The effects of rolling path on mechanical properties were investigated in detail.Both pre-cold rolling al... Pre-cold rolling with low reductions(<3%)was used to improve the mechanical properties of rolled ZK60 plates.The effects of rolling path on mechanical properties were investigated in detail.Both pre-cold rolling along the transverse direction(TD)and pre-cold rolling along the normal direction(ND)can increase the yield strength.However,pre-cold rolling along the TD is more effective than pre-cold rolling along the ND in improving the comprehensive mechanical properties.After pre-cold rolling to 3%reduction,the sample rolled along the TD and the sample rolled along the ND have similar tensile yield strength(~270 MPa).However,the former has a higher compressive yield strength,lower yield asymmetry and larger toughness than the latter.Moreover,pre-cold rolling can also enhance precipitation hardening effect.However,aging treatment cannot further improve the yield strength of pre-cold rolled samples.Finally,the related mechanism is discussed. 展开更多
关键词 ZK60 alloy pre-cold rolling DISLOCATION TWIN aging mechanical properties
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