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Finite element analysis of stress-strain localization and distribution in Al-4.5Cu-2Mg alloy 被引量:1
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作者 Rahul BHANDARI Prosanta BISWAS +1 位作者 Manas Kumar MONDAL Durbadal MANDAL 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第6期1200-1215,共16页
Finite element analysis has been carried out to understand the effect of various processing routes and condition on the microscale deformation behavior of Al–4.5 Cu–2 Mg alloy. The alloy has been developed through f... Finite element analysis has been carried out to understand the effect of various processing routes and condition on the microscale deformation behavior of Al–4.5 Cu–2 Mg alloy. The alloy has been developed through four different routes and condition, i.e. conventional gravity casting with and without refiner, rheocasting and SIMA process. The optical microstructures of the alloy have been used to develop representative volume elements(RVEs). Two different boundary conditions have been employed to simulate the deformation behavior of the alloy under uniaxial loading. Finally, the simulated stress-strain behavior of the alloy is compared with the experimental result. It is found that the microstructural morphology has a significant impact on stress and strain distribution and load carrying capacity. The eutectic phase always carries a higher load than the α(Al) phase. The globular α(Al) grains with thinner and uniformly distributed eutectic network provide a better stress and strain distribution. Owing to this, SIMA processed alloy has better stress and strain distribution than other processes. Finally, the simulated yield strength of the alloy is verified by experiment and they have great agreement. 展开更多
关键词 al-4.5cu-2mg alloy MICROSTRUCTURE a(Al) phase eutectic phase finite element analysis micromechanical response
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Microstructures and Mechanical Properties of TiC_P/Al-4.5Cu-0.8Mg Composites by Direct Reaction Synthesis
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作者 MingzhenMA DayongCAI TianhuaWEI 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第5期447-449,共3页
Direct reaction synthesis (DRS), based on the principle of self-propagating high-temperature synthesis (SHS), is a new method for preparing participate metal matrix composites. TiCP/AI-4.5Cu-0.8Mg composites were fabr... Direct reaction synthesis (DRS), based on the principle of self-propagating high-temperature synthesis (SHS), is a new method for preparing participate metal matrix composites. TiCP/AI-4.5Cu-0.8Mg composites were fabricated by DRS. Participate composites were fabricated with Ti carbide (TiC) particles, generally less than 1.0μm. The reacted, thermal extruded samples exhibit a homogeneous distribution of fine TiC particles in AI-4.5Cu-0.8Mg matrix. Mechanical property evaluation of the composites has revealed a very high tensile strength relative to the matrix alloy. Fractographic analysis indicates ductile failure. 展开更多
关键词 TiCp/al-4.5cu-0.8mg composites Microstructure Mechanical property TiC particle
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时效态Al-4.5Cu-0.6Mg(-0.3Si)合金的组织与力学性能 被引量:2
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作者 王川 陈立佳 +1 位作者 车欣 李锋 《材料热处理学报》 EI CAS CSCD 北大核心 2015年第6期36-40,共5页
通过硬度和拉伸性能测试以及扫描电镜和透射电镜观察,研究了Al-4.5Cu-0.6Mg和Al-4.5Cu-0.6Mg-0.3Si合金在180℃下进行不同保温时间(6、10、14和18 h)的时效处理及元素Si对力学性能的影响。结果表明:随时效时间的延长,Al-4.5Cu-0.6Mg(-0.... 通过硬度和拉伸性能测试以及扫描电镜和透射电镜观察,研究了Al-4.5Cu-0.6Mg和Al-4.5Cu-0.6Mg-0.3Si合金在180℃下进行不同保温时间(6、10、14和18 h)的时效处理及元素Si对力学性能的影响。结果表明:随时效时间的延长,Al-4.5Cu-0.6Mg(-0.3Si)合金的硬度和强度先增大后减小,断裂伸长率明显降低;Si元素的添加使Al-4.5Cu-0.6Mg合金的硬度、强度、断裂伸长率均有明显提高,但延迟了Al-4.5Cu-0.6Mg合金达到峰时效的时间。利用SEM对Al-4.5Cu-0.6Mg(-0.3Si)合金拉伸断口形貌进行的观察表明:加入0.3%的Si元素后,Al-4.5Cu-0.6Mg合金的断裂特征由韧脆混合断裂变为韧性断裂。 展开更多
关键词 al-4.5cu-0.6mg(-0.3Si)合金 时效 微观组织 拉伸断口
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Effects of La-Ce addition on microstructure and mechanical properties of Al-18Si-4Cu-0.5Mg alloy 被引量:13
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作者 Gao-yong LIN Kun LI +3 位作者 Di FENG Yong-ping FENG Wei-yuan SONG Meng-qiong XIAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第8期1592-1600,共9页
The microstructural evolution and mechanical properties of Al-18 Si-4 Cu-0.5 Mg alloy modified by the addition of La-Ce rare earth elements through OM,SEM,EPMA and tensile tests were investigated.The results of OM and... The microstructural evolution and mechanical properties of Al-18 Si-4 Cu-0.5 Mg alloy modified by the addition of La-Ce rare earth elements through OM,SEM,EPMA and tensile tests were investigated.The results of OM and SEM analyses indicated that primary Si particles were significantly refined from coarse block-like and irregular polygonal shapes into fine flaky shapes,while eutectic Si particles were modified from coarse and needle-like into fine and rod-or coral-like shapes with increase of La-Ce addition.The alloy exhibited the minimum primary Si particle size and the best mechanical properties with the addition of 0.3 wt.%La-Ce.The average particle size decreased from 61 to 28 μm,the ultimate tensile strength increased from 222 to 242 MPa and the elongation increased from 3.2% to 6.3%.In addition,modification mechanisms and fracture modes were explored by the means of SEM and EPMA. 展开更多
关键词 al-18Si-4cu-0.5mg alloy primary Si eutectic Si La-Ce addition mechanical properties
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时效时间对Al-4.5Cu-0.6Mg合金力学性能的影响
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作者 王川 车欣 陈立佳 《热加工工艺》 CSCD 北大核心 2015年第8期185-186,190,共3页
通过硬度测试和拉伸性能测试,研究了时效时间对热挤压Al-4.5Cu-0.6Mg合金力学性能的影响;利用SEM对Al-4.5Cu-0.6Mg合金拉伸断口形貌进行观察。结果表明:随时效时间的延长,Al-4.5Cu-0.6Mg合金的硬度和强度先增大后减小,断裂伸长率明显降... 通过硬度测试和拉伸性能测试,研究了时效时间对热挤压Al-4.5Cu-0.6Mg合金力学性能的影响;利用SEM对Al-4.5Cu-0.6Mg合金拉伸断口形貌进行观察。结果表明:随时效时间的延长,Al-4.5Cu-0.6Mg合金的硬度和强度先增大后减小,断裂伸长率明显降低,其中在180℃时效10 h时,合金表现出良好的综合力学性能;固溶+时效态Al-4.5Cu-0.6Mg合金的断口呈现沿晶和穿晶混合断裂特征。 展开更多
关键词 al-4.5cu-0.6mg合金 热处理 力学性能 拉伸断口
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Influence of Li addition on mechanical property and aging precipitation behavior of A1-3.5Cu-1.5Mg alloy 被引量:1
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作者 邓运来 杨金龙 +2 位作者 李思宇 张劲 张新明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第6期1653-1658,共6页
The influence of Li addition on mechanical property and aging precipitation behavior of Al-3.5Cu-1.5Mg alloy was investigated by tensile test,scanning electron microscopy(SEM),transmission electron microscopy(TEM)... The influence of Li addition on mechanical property and aging precipitation behavior of Al-3.5Cu-1.5Mg alloy was investigated by tensile test,scanning electron microscopy(SEM),transmission electron microscopy(TEM) and high resolution transmission electron microscopy(HRTEM).The results show that the tensile strength can be significantly improved with the slightly decreased ductility and the form of fracture morphology is converted from ductile fracture into ductile/britde mixed fracture by adding 1.0%Li.Besides,the peak aging time at 185 ℃ is delayed from 12 to 24 h and the main precipitation phase S(Al2CuMg) is converted into S'(Al2CuMg)+δ(Al3Li),while the formation of S'(Al2CuMg) is delayed. 展开更多
关键词 aluminum alloy al-3.5cu-1.5mg alloy LI aging behavior mechanical properties
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Microstructure and Wear Characteristics of Al-4.5Cu-5Pb Alloy
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作者 Om Prakas Pandey(School of Basic and Applied Sciences, Thapar Institute of Engineering & Technology, Patiala-147001, India) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1998年第2期125-131,共7页
Al-4. 5Cu-5Pb alloy was prepared by sand and chill casting. The same alloy was also spray deposited at a gas pressure of 1.6 MPa. The microstructural features exhibit a coarse to fine dendritic morphology for sand ... Al-4. 5Cu-5Pb alloy was prepared by sand and chill casting. The same alloy was also spray deposited at a gas pressure of 1.6 MPa. The microstructural features exhibit a coarse to fine dendritic morphology for sand and chill cast alloys. Equiaxed grains were observed for spray formed alloys. Wear testing employing a pin-on-disc type set-up, reveals considerably lower wear of spray deposited alloy compared to that of chill and sand cast alloys. The morphological features of wear track on specimen and debris indicated a mixed oxidative-cum-adhesive wear mechanisms for these alloys tested in the present investigation. (Edited author abstract) 36 Refs. 展开更多
关键词 AL CU Microstructure and Wear Characteristics of al-4.5cu-5Pb alloy PB
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均匀化处理对Al-Cu-Mg合金组织和性能的影响 被引量:7
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作者 李春明 林资源 +5 位作者 张承基 赖文泉 胡明伟 张洋 左玲立 陈蕴博 《材料热处理学报》 EI CAS CSCD 北大核心 2020年第4期62-67,共6页
利用光学显微镜、扫描电镜、能谱分析、差热分析、硬度测试和拉伸测试等方法研究了均匀化处理对Al-4.5Cu-0.8Mg合金的组织和性能的影响。结果表明:Al-4.5Cu-0.8Mg铸态组织中存在较严重的枝晶偏析现象,晶界及晶界交汇处有大量Al2Cu相及Al... 利用光学显微镜、扫描电镜、能谱分析、差热分析、硬度测试和拉伸测试等方法研究了均匀化处理对Al-4.5Cu-0.8Mg合金的组织和性能的影响。结果表明:Al-4.5Cu-0.8Mg铸态组织中存在较严重的枝晶偏析现象,晶界及晶界交汇处有大量Al2Cu相及Al2Cu和Al2CuMg的共晶相,合金经480℃×12 h均匀化处理后,组织中的非平衡相已基本溶解,综合力学性能较好,抗拉强度为320 MPa,屈服强度为246 MPa,伸长率为10.2%,硬度为139.2 HV。 展开更多
关键词 al-4.5cu-0.8mg合金 均匀化 枝晶偏析 力学性能
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Production of grain-refined AC7A Al-Mg alloy via solidification in ultrasonic field 被引量:3
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作者 W.KHALIFA Y.TSUNEKAWA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第4期930-937,共8页
The objective of the current study was to investigate the use of ultrasonic melt treatment technology in the production of grain-refined billets of the AC7 A alloy, which was intended for subsequent use as a feedstock... The objective of the current study was to investigate the use of ultrasonic melt treatment technology in the production of grain-refined billets of the AC7 A alloy, which was intended for subsequent use as a feedstock in forming operations. The experiments included the application of ultrasonic vibrations to the molten alloys via direct and indirect techniques. Several process parameters such as pouring temperatures(several temperatures between 740 and 660℃), and treatment time(from 12 min down to 2 min) were investigated. The experiment included continuous ultrasonic treatment from the liquid to the semisolid states. The results showed that both treatment techniques were viable for producing billets with the desirable microstructural characteristics. The optimum treatment conditions were the short treatment time(2 to 3 min), from about 660℃ down to 615℃ for the indirect treatment technique, and from 660℃ to 635℃ for the direct treatment technique. The resulting microstructures, at three positions along the height of the ingot, were characterized by fine, non-dendritic α(Al) grains in the order of a hundred microns, as compared to few thousands of microns for the conventional cast ingots. The intermetallic particles were also refined in size and modified in morphology by the ultrasonic treatment. The operating mechanisms by which the ultrasonic vibrations altered the ingot microstructures were discussed and analyzed. 展开更多
关键词 al-4.5mg alloy ultrasonic melt treatment grain refining INTERMETALLICS
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Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al–13Si–7.5Cu–1Mg alloy 被引量:4
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作者 Gao-yong Lin Xin Tan +2 位作者 Di Feng Jing-li Wang Yu-xia Lei 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2019年第8期1013-1019,共7页
The effects of conform continuous extrusion and subsequent heat treatment on the mechanical and wear-resistance properties of high-alloying Al–13Si–7.5Cu–1Mg alloy were investigated.The microstructures of alloys be... The effects of conform continuous extrusion and subsequent heat treatment on the mechanical and wear-resistance properties of high-alloying Al–13Si–7.5Cu–1Mg alloy were investigated.The microstructures of alloys before and after conform processing and aging were compared by transmission electron microscopy and scanning electron microscopy,respectively.The results reveal that the primary phases were broken and refined by intense shear deformation during conform processing.After the conform-prepared Al–13Si–7.5Cu–1Mg alloy was subjected to solid-solution treatment at 494℃for 1.5 h and aging at 180℃for 4 h,its hardness improved from HBS 115.8 to HBS 152.5 and its ultimate tensile strength increased from 112.6 to 486.8 MPa.Its wear resistance was also enhanced.The factors leading to the enhanced strength,hardness,and wear resistance of the alloy were discussed in detail. 展开更多
关键词 al-13Si-7.5cu-1mg alloy CONFORM CONTINUOUS EXTRUSION heat treatment wear resistance
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Al-4.5Cu-3.5Zn-0.5Mg铸造铝合金的均匀化工艺及组织演变 被引量:3
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作者 王南海 易丹青 +1 位作者 王海生 成勇 《金属热处理》 CAS CSCD 北大核心 2020年第1期174-180,共7页
对Al-4. 5Cu-3. 5Zn-0. 5Mg铸态合金进行不同双级均匀化处理,采用扫描电镜、电子探针显微分析仪、差示扫描量热仪和光学显微镜等,研究了该合金的铸态组织及其在均匀化过程中的组织演变。结果表明:铸态组织主要由α-Al、粗大Al2Cu相以及... 对Al-4. 5Cu-3. 5Zn-0. 5Mg铸态合金进行不同双级均匀化处理,采用扫描电镜、电子探针显微分析仪、差示扫描量热仪和光学显微镜等,研究了该合金的铸态组织及其在均匀化过程中的组织演变。结果表明:铸态组织主要由α-Al、粗大Al2Cu相以及少量AlZnMgCu、Al7Cu2Fe相组成,合金元素枝晶偏析严重。经470℃×12 h均匀化处理后,AlZnMgCu相已基本回溶至基体;第二级均匀化温度由490℃逐渐升高到520℃或者延长保温时间,Al2Cu相逐渐回溶至基体,合金元素分布趋于均匀。合金过烧温度为520℃,最佳双级均匀化制度为470℃×12 h+510℃×32 h,该制度与均匀化动力学计算结果基本一致。 展开更多
关键词 al-4.5cu-3.5Zn-0.5mg合金 双级均匀化 微观结构
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Effects of cerium on microstructure and bonding strength of Cu-14Al-4.5Fe bronze plasma sprayed coating 被引量:3
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作者 李文生 路阳 +1 位作者 袁柯祥 苑重光 《Journal of Rare Earths》 SCIE EI CAS CSCD 2011年第4期363-369,共7页
Cu-14Al-4.5Fe bronze powders with and without 0.6% Ce were prepared and their coatings were fabricated on 45# carbon steel substrate by atmospheric plasma spraying. The effects of rare earth Ce on the coating interfac... Cu-14Al-4.5Fe bronze powders with and without 0.6% Ce were prepared and their coatings were fabricated on 45# carbon steel substrate by atmospheric plasma spraying. The effects of rare earth Ce on the coating interface bonding strength, coatings and bonding interface vertical sections microstructure were investigated by tensile machine, X-ray diffraction analysis, scanning electron microscopy (SEM) and electronic probe microanalysis (EPMA). The results showed that the shape of powders was more spherical like, and the coating’s hardness and interface bonging tensile strength would be improved to 8.9% and 17.4%, respectively, higher than that of the Cu-14Al-4.5Fe coating without 0.6% Ce added. The refined of κ phases, well distributed matrix phases in coatings and the promotion of Fe, Al elements diffusion led to the improvement in interface bonding strength and hardness of the Cu-14Al-4.5Fe coating with addition of 0.6% Ce, which hardened and strengthened the coating. 展开更多
关键词 rare earth cu-14al-4.5Fe alloy MICROSTRUCTURE bonding strength rare earths
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热处理对铝铜镁合金组织与性能的影响 被引量:7
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作者 胡文全 迟长志 《热加工工艺》 CSCD 北大核心 2011年第4期157-159,共3页
对Al-4.3Cu-0.8Mg合金进行不同的热处理,通过显微组织观察、力学性能检测及断口形貌分析,对Al-Cu-Mg合金硬度和冲击韧度进行了研究。结果表明:对合金进行固溶+时效处理,可明显细化合金组织,提高合金的硬度和韧性;Al-4.3Cu-0.8Mg合金经52... 对Al-4.3Cu-0.8Mg合金进行不同的热处理,通过显微组织观察、力学性能检测及断口形貌分析,对Al-Cu-Mg合金硬度和冲击韧度进行了研究。结果表明:对合金进行固溶+时效处理,可明显细化合金组织,提高合金的硬度和韧性;Al-4.3Cu-0.8Mg合金经525℃固溶8 h+190℃时效10 h处理后,硬度可达最高;经505℃固溶6 h+180℃时效8 h处理后,冲击韧度最好。 展开更多
关键词 al-4.3cu-0.8mg合金 热处理 显微组织 硬度 冲击韧度
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T6处理对半固态压铸Al-27Si合金组织与性能的影响 被引量:1
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作者 颜丙栋 毛卫民 闫鹏宇 《特种铸造及有色合金》 CAS 北大核心 2022年第3期346-349,共4页
采用纯铜质蛇形通道复合Sr变质制备了Al-27Si-4.5Cu-0.6Mg合金的半固态浆料,并进行了压铸,研究了在不同Sr加入量时,T6处理对流变压铸试样的性能和组织的影响。结果表明,复合工艺充分细化了初生Si和有效变质了共晶Si,再经T6处理后可以得... 采用纯铜质蛇形通道复合Sr变质制备了Al-27Si-4.5Cu-0.6Mg合金的半固态浆料,并进行了压铸,研究了在不同Sr加入量时,T6处理对流变压铸试样的性能和组织的影响。结果表明,复合工艺充分细化了初生Si和有效变质了共晶Si,再经T6处理后可以得到圆整的颗粒状共晶Si和棱角被钝化的初生Si,并且热处理前的变质效果越好,T6处理后得到的共晶Si形貌越圆整细小。T6处理进一步提高了复合处理制备的Al-27Si-4.5Cu-0.6Mg合金半固态流变压铸试样的抗拉强度,热处理前后的最高抗拉强度都出现在Sr含量为0.02%条件下,分别为228.8 MPa和254.7 MPa。 展开更多
关键词 al-27Si-4.5cu-0.6mg合金 T6处理 蛇形通道 流变压铸 共晶Si
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