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EFFECT OF AGING ON INTERNAL FRICTION,ELASTIC MODULUS AND MECHANICAL PROPERTIES OF TERNARY Mn-Cu-Al ALLOYS 被引量:1
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作者 YI Huchun GE Tingsui (T.S.Ke) Institute of Solid State Physics,Academia Sinica,Hefei,China GE Tingsui,Professor,Laboratory of Internal Friction and Defects in Solids,Institute of Solid State Physics,Academia Sinica,Hefei,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1989年第2期100-107,共8页
Internal friction and elastic modulus of ternary Mn-Cu-Al alloys containing 56—60 wt-% Mn,0-3.59 wt-% Al were measured with acoustic frequency,1 kHz,in the tempera- ture range of-150 to 150℃.It was found that when t... Internal friction and elastic modulus of ternary Mn-Cu-Al alloys containing 56—60 wt-% Mn,0-3.59 wt-% Al were measured with acoustic frequency,1 kHz,in the tempera- ture range of-150 to 150℃.It was found that when the specimen was aged in the temperature range under the spinodal curve within the miscibility gap(400—500℃),the internal fric- tion increases with an increase of the aging time and reaches a maximum value at a certain ag- ing time which is shorter with a higher aging temperature.Two internal friction peaks which did not appear before the aging were observed above room temperature after a definite aging time.These are respectively the martensitic tranformation peak and the relaxation peak orig- inating from the stress-induced movement of the twin boundaries.The former peak shifts to- ward higher temperatures with an increase of the aging time,whereas the relaxation peak ap- pearing at 15℃,is independent of the aging time and temperature.The activation energy as- sociated with the relaxation peak was found to be 0.56 eV which is about the same as that of the relaxation peak in binary alloy containing 90 wt-% Mn.It was also found that the hardness,strength and the brittleness of the specimen increase when aged below the spinodal curve within the miscibility gap.The addition or Al enhances the strength but reduces the in- ternal friction of the specimen.A choice of suitable aging time and temperature can give an optimum compromise of high strength and high internal friction.Analysis of experimental re- sults suggests that spinodal decomposition leads to Mn-rich zones in the specimen and thus causes the phase transformation and the change of mechanical properties of the specimen. 展开更多
关键词 internal friction Mn-Cu-al alloy elastic modulus mechanical properties AGING
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Effect of texture on internal friction of Cu-Al-Mn based shape memory alloys
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作者 须藤祐司 OMORI Toshihiro +2 位作者 KOEDA Naoki KAINUMA Ryosuke ISHIDA Kiyohito 《材料与冶金学报》 CAS 2005年第2期91-91,共1页
Shape memory alloys (SMAs) are well-known as high damping materials. Recently,we have reported that the Cu-Al-Mn SMAs show a high internal friction as well as the other SMAs such as Ni-Ti, Cu-Zn-Al SMAs. Since the Cu-... Shape memory alloys (SMAs) are well-known as high damping materials. Recently,we have reported that the Cu-Al-Mn SMAs show a high internal friction as well as the other SMAs such as Ni-Ti, Cu-Zn-Al SMAs. Since the Cu-Al-Mn-based SMAs possess an excellent cold-workability, a strong recrystallization texture can be formed by thermomechanical treatment. The present authors demonstrated that the texture control is considerably effective for improving the SM properties and especially, in the Cu-Al-Mn-Ni SMAs with a strong {112}<110> recrystallization texture, a large pseudoelastic (PE) of about 7% can be obtained. Such a texture control is expected to enhance the damping capacity in the Cu-Al-Mn-based SMAs as well as PE. In this study, the effect of texture on the internal friction in Cu-Al-Mn and Cu-Al-Mn-Ni SMAs was investigated by tensile testing mode of Dynamic Mechanical Spectrometer (DMS). In sheet specimens with the {112}<110> texture, value of dynamic damping tanφ depends on the loading direction and an excellent damping capacity of tanφ= 0.1 can be obtained at the rolling direction in the martensite phase condition. Moreover, these Cu-Al-Mn-based SMAs show a high tensile strength over 600 MPa in the martensite phase. The present Cu-Al-Mn-based SMAs should have a great potential as the damping materials. 展开更多
关键词 Cu-al-Mn系 形状记忆合金 内耗 结构
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EFFECT OF HEAT TREATMENT ON INTERNAL FRICTION OF GRAIN BOUNDARY IN 2091 Al-Li ALLOY
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作者 Sun Dongli, Yang Dezhuang, Yang Zhengyao School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 Zhou Aijun Beijing Research Institute of Aeronautical Materials, Beijing 100095 《中国有色金属学会会刊:英文版》 CSCD 1997年第3期119-123,共5页
EFFECTOFHEATTREATMENTONINTERNALFRICTIONOFGRAINBOUNDARYIN2091AlLiALLOYSunDongli,YangDezhuang,YangZhengyaoSch... EFFECTOFHEATTREATMENTONINTERNALFRICTIONOFGRAINBOUNDARYIN2091AlLiALLOYSunDongli,YangDezhuang,YangZhengyaoSchoolofMaterialsSci... 展开更多
关键词 al Li alloy internal friction of GRAIN BOUNDARY microstructure HEAT treatment
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Effect of heat treatment on mechanical and wear properties of Zn−40Al−2Cu−2Si alloy 被引量:3
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作者 Temel SAVAŞKAN Zeki AZAKLI Ali Paşa HEKÌMOĞLU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第9期2651-2663,共13页
In order to determine the effect of heat treatment on the mechanical and wear properties of Zn−40Al−2Cu−2Si alloy,different heat treatments including homogenization followed by air-cooling(H1),homogenization followed ... In order to determine the effect of heat treatment on the mechanical and wear properties of Zn−40Al−2Cu−2Si alloy,different heat treatments including homogenization followed by air-cooling(H1),homogenization followed by furnace-cooling(H2),stabilization(T5)and quench−aging(T6 and T7)were applied.The effects of these heat treatments on the mechanical and tribological properties of the alloy were studied by metallography and,mechanical and wear tests in comparison with SAE 65 bronze.The wear tests were performed using a block on cylinder type test apparatus.The hardness,tensile strength and compressive strength of the alloy increase by the application of H1 and T6 heat treatments,and all the heat treatments except T6,increase its elongation to fracture.H1,T5 and T6 heat treatments cause a reduction in friction coefficient and wear volume of the alloy.However,this alloy exhibits the lowest friction coefficient and wear volume after T6 heat treatment.Therefore,T6 heat treatment appears to be the best process for the lubricated tribological applications of this alloy at a pressure of 14 MPa.However,Zn−40Al−2Cu−2Si alloy in the as-cast and heat-treated conditions shows lower wear loss or higher wear resistance than the bronze. 展开更多
关键词 znal based alloys heat treatment structural features mechanical properties lubricated friction and wear
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Effect of friction stir processing on microstructure and damping capacity of AZ31 alloy 被引量:1
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作者 ZANG Qian-hao CHEN Hong-mei +2 位作者 LAN Fang-yuan ZHANG Jing JIN Yun-xue 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第5期1034-1039,共6页
AZ31 alloy sheet fabricated by rolling was processed by friction stir processing(FSP) with different passes. The effect of FSP on the microstructure and damping capacity of AZ31 alloy sheet was discussed. The fine and... AZ31 alloy sheet fabricated by rolling was processed by friction stir processing(FSP) with different passes. The effect of FSP on the microstructure and damping capacity of AZ31 alloy sheet was discussed. The fine and equiaxed grains were obtained in the stirred zone(SZ) for FSPed samples from 1 pass to 3 passes with the average grain size of 10.6, 10.4 and 13.6 μm, respectively. The damping peak P_1 was presented on the curves of temperature-dependent damping capacity for FSPed samples. The damping peak P_2 was restrained after FSP and the damping peak P_1 was a relaxation process. The FSPed samples(2-pass FSP and 3-pass FSP) obtained high damping capacity. The best damping valuesQ_0^(-1)(ε=10_(-4)) and damping values Q_H^(-1)(ε=10^(-3)) of the sample subjected to 3-pass FSP(0.0131 and 0.0496) increased by 33.7% and 157.0%, respectively. 展开更多
关键词 MG-al-zn alloy (AZ31) friction STIR processing (FSP) DAMPING PEAK G-L model
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THE EFFECTS OF TRACE Ti ON THE DAMPING CAPACITY OF THE Zn-22% Al ALLOY
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作者 Zhou Shanchu Luo Binghui(Department of Material Science and Engineering, Central South University of Thechnology, Changsha, 410083, China) 《Journal of Central South University》 SCIE EI CAS 1994年第1期40-44,共5页
THEEFFECTSOFTRACETiONTHEDAMPINGCAPACITYOFTHEZn-22%AlALLOYTHEEFFECTSOFTRACETiONTHEDAMPINGCAPACITYOFTHEZn-22%A... THEEFFECTSOFTRACETiONTHEDAMPINGCAPACITYOFTHEZn-22%AlALLOYTHEEFFECTSOFTRACETiONTHEDAMPINGCAPACITYOFTHEZn-22%AlALLOY¥ZhouShanch... 展开更多
关键词 zn-al alloy internal friction TITANIUM DAMPING stability
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EFFECTS OF TRACE Zr ON FATIGUE CRACK GROWTH RATE OF HIGH DAMPING Zn-Al ALLOY
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作者 Zhou Shanchu Luo Binghui (Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083) 《中国有色金属学会会刊:英文版》 CSCD 1996年第3期92-95,共4页
EFFECTSOFTRACEZrONFATIGUECRACKGROWTHRATEOFHIGHDAMPINGZn-AlALLOY¥ZhouShanchu;LuoBinghui(DepartmentofMaterials... EFFECTSOFTRACEZrONFATIGUECRACKGROWTHRATEOFHIGHDAMPINGZn-AlALLOY¥ZhouShanchu;LuoBinghui(DepartmentofMaterialsScienceandEnginee... 展开更多
关键词 ZR zn-al alloy fatigue CRACK growth rate internal friction
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Zr对Zn-Al合金阻尼性能影响的研究 被引量:7
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作者 关德林 魏海军 +1 位作者 于志伟 许晓磊 《机械工程材料》 CAS CSCD 北大核心 2002年第4期32-34,共3页
研究了微量Zr对Zn Al合金阻尼性能的影响 ,用电阻炉石墨坩埚熔炼了Zn Al合金和Zn Al Zr合金 ,对合金的显微组织进行了金相观察 ,用X射线衍射法进行了相结构分析 ,测量了铸态和淬火态在不同温度及频率的内耗。结果表明 :添加微量Zr可以... 研究了微量Zr对Zn Al合金阻尼性能的影响 ,用电阻炉石墨坩埚熔炼了Zn Al合金和Zn Al Zr合金 ,对合金的显微组织进行了金相观察 ,用X射线衍射法进行了相结构分析 ,测量了铸态和淬火态在不同温度及频率的内耗。结果表明 :添加微量Zr可以细化合金的铸态组织 ,但并不改变合金的相结构 。 展开更多
关键词 zn-al合金 阻尼 晶界内耗 锌合金
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硅元素对Zn-75Al合金组织及性能的影响 被引量:4
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作者 李永刚 赵向南 +1 位作者 范桂霞 孔亚萍 《郑州大学学报(工学版)》 CAS 北大核心 2014年第2期100-103,共4页
锌铝合金以其优异的铸造性能、机械性能以及耐磨减磨性能成为近年的研究热点之一.笔者通过金相显微镜、TH700型维氏硬度计、电子万能试验机及MMU-10G磨损试验机研究了Si元素对Zn-75Al合金微观组织、力学性能及干摩擦性能的影响.结果表明... 锌铝合金以其优异的铸造性能、机械性能以及耐磨减磨性能成为近年的研究热点之一.笔者通过金相显微镜、TH700型维氏硬度计、电子万能试验机及MMU-10G磨损试验机研究了Si元素对Zn-75Al合金微观组织、力学性能及干摩擦性能的影响.结果表明:Zn-75Al合金添加Si元素后,试验合金微观组织中析出共晶硅相,当Si含量小于3%时,共晶硅均匀分布,而硅含量大于3%时,共晶硅尺寸变大,出现微观偏析,并析出少量形状不规则的初晶硅相;试验合金的维氏硬度增加,伸长率逐渐降低,而抗拉强度先增加后降低,当硅含量为3%时,抗拉强度最大;摩擦系数及磨损量先降低后增加,当硅含量为3%时,合金的耐磨性能最好. 展开更多
关键词 锌铝合金 微观组织 力学性能 干滑动摩擦
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Al-Zn-Mg-Sc-Zr合金搅拌摩擦焊接接头的显微组织、力学性能及局部腐蚀性能 被引量:4
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作者 叶锐 杨继东 +2 位作者 彭小燕 徐国富 尹志民 《中国有色金属学报》 EI CAS CSCD 北大核心 2015年第10期2656-2665,共10页
通过硬度测试、极化曲线测试、腐蚀浸泡和慢应变速率拉伸方法研究Al-Zn-Mg-Sc-Zr合金板材搅拌摩擦焊接接头的力学性能和局部腐蚀性能,并利用金相显微镜和透射电镜对焊接接头的显微组织进行分析。结果表明:焊接接头的硬度曲线呈现W型,硬... 通过硬度测试、极化曲线测试、腐蚀浸泡和慢应变速率拉伸方法研究Al-Zn-Mg-Sc-Zr合金板材搅拌摩擦焊接接头的力学性能和局部腐蚀性能,并利用金相显微镜和透射电镜对焊接接头的显微组织进行分析。结果表明:焊接接头的硬度曲线呈现W型,硬度最低值出现在热影响区与热机影响区的交界处;和母材相比,焊接接头的局部抗腐蚀性能降低,应力腐蚀敏感性增大。热机影响区的腐蚀电位最低,腐蚀电流密度最高,晶间腐蚀深度最大,抗腐蚀性能最差。热机影响区的硬度和腐蚀性能的降低,主要是由于该区的晶粒发生变形,大部分η′沉淀强化相溶解,晶界上分布着大量的η相。 展开更多
关键词 al-zn-Mg-Sc-Zr合金 搅拌摩擦焊接 显微组织 力学性能 局部腐蚀
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Al-Zn基耐磨合金的摩擦磨损特性 被引量:4
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作者 耿浩然 王桂青 马家骥 《摩擦学学报》 EI CAS CSCD 北大核心 1992年第4期317-324,共8页
本文根据滑动轴承材科的性能要求,对自行研制的Al-Zn基耐磨合金的摩擦学性能与ZQSn 6-6-3等的进行了对比试验研究。结果表明,在给定的试验条件下,Al-Zn基耐磨合金的减摩性能、耐磨性能和承载能力都比ZQSn6-6-3的好,且其小含稀贵金属(材... 本文根据滑动轴承材科的性能要求,对自行研制的Al-Zn基耐磨合金的摩擦学性能与ZQSn 6-6-3等的进行了对比试验研究。结果表明,在给定的试验条件下,Al-Zn基耐磨合金的减摩性能、耐磨性能和承载能力都比ZQSn6-6-3的好,且其小含稀贵金属(材料易得),可以作为ZQSn6-6-3的替代材料制作滑动轴承配件。 展开更多
关键词 耐磨合金 轴承材料 摩擦 磨损 性能
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喷射成形Zn52Al40Cu2Si6微观形貌及耐磨性能 被引量:1
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作者 杨诚笑 杜春风 +3 位作者 陈兴 严彪 王军 唐人剑 《摩擦学学报》 EI CAS CSCD 北大核心 2009年第6期584-591,共8页
采用喷射成形工艺制备高铝锌基合金,利用扫描电镜、金相显微镜、透射电镜及X-射线衍射等表征了合金的磨损形貌和内部组织,采用M2000摩擦试验机考察了高铝锌基合金的摩擦磨损性能.结果表明,沉积坯大部分为粗化均细的共析片层状组织,呈不... 采用喷射成形工艺制备高铝锌基合金,利用扫描电镜、金相显微镜、透射电镜及X-射线衍射等表征了合金的磨损形貌和内部组织,采用M2000摩擦试验机考察了高铝锌基合金的摩擦磨损性能.结果表明,沉积坯大部分为粗化均细的共析片层状组织,呈不均匀微观分布态,而不是通常认为的树枝晶结构.沉积过程中形成较多无规则、不均匀分布的孔洞,致密度只有60%左右;由于时效后期的四相反应α+ε→Τ′+η,合金的硬度热处理后下降.试验中,硅颗粒在合金基体中始终呈均匀分布.通过M2000摩擦试验机测试合金的摩擦磨损性能.Zn52Al40Cu2Si6合金在2000N载荷,200r/min试验条件下呈最佳耐磨性能.合金的摩擦系数随着载荷的增加而减小. 展开更多
关键词 喷射成形 高铝锌基合金 摩擦磨损 微观组织
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含铈高阻尼Zn-Al合金的疲劳裂纹扩展
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作者 周善初 刘维镐 罗兵辉 《稀有金属与硬质合金》 CAS CSCD 1996年第2期10-14,共5页
测定了一种含Ce高阻尼Zn-Al合金的疲劳裂纹扩展速率,并与不含Ce的Zn-Al合金作了比较。认为含Ce合全较低的疲劳裂纹扩展速率与其具有较高的内耗值有关。
关键词 锌铝合金 疲劳裂纹扩展速率 内耗
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Cu-Zn-Al合金的马氏体相变内耗
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作者 陈继勤 程饴萱 方晓旻 《科技通报》 1991年第4期202-206,共5页
本文研究了相变温度范围内Cu-Zn-Al合金的内耗性能。合金的分析成分为Cu69.24Zn26.62 Al 4.14 wt%,合金相变温度M_s、M_f、A_s和A_f分别为69、40、54和70℃。结果表明:内耗由三部分组成,它们是马氏体-马氏体界面内耗、马氏体-热转变母... 本文研究了相变温度范围内Cu-Zn-Al合金的内耗性能。合金的分析成分为Cu69.24Zn26.62 Al 4.14 wt%,合金相变温度M_s、M_f、A_s和A_f分别为69、40、54和70℃。结果表明:内耗由三部分组成,它们是马氏体-马氏体界面内耗、马氏体-热转变母相的界面内耗和马氏体(应力诱发的)-母相的界面内耗。Cu-Zn-Al合金的相变内耗值很高(Q^(-1)≈5×10^(-2))。模拟使用条件的激振试验还表明:这种高的相变内耗在使用过程中衰减缓慢。因此Cu-Zn-Al记忆合金还可作高阻尼材料用。 展开更多
关键词 内耗 马氏体相变 CU-zn-al合金
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Mg-Al-Zn合金搅拌摩擦焊接头在同轴压缩过程中的组织演变规律
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作者 郑建军 李亚杰 《热加工工艺》 北大核心 2021年第23期31-35,40,共6页
为了探究Mg-Al-Zn合金搅拌摩擦焊接头在变形过程中的失效规律,利用万能试验机系统研究了接头在同轴压缩过程中的应力-应变行为及微观组织演变规律。结果表明,Mg-Al-Zn合金接头不同区域在变形过程中会出现不均匀的凹凸现象,这主要由于在... 为了探究Mg-Al-Zn合金搅拌摩擦焊接头在变形过程中的失效规律,利用万能试验机系统研究了接头在同轴压缩过程中的应力-应变行为及微观组织演变规律。结果表明,Mg-Al-Zn合金接头不同区域在变形过程中会出现不均匀的凹凸现象,这主要由于在搅拌摩擦焊周期性的搅拌作用下接头形成不同的微区织构,从而造成接头中心和边部表现出不同的塑性变形能力。压缩过程中主要的塑性变形量发生在焊核区,并伴随大量孪晶的出现,随着变形量从3%增加到9%,孪生现象先增强后减缓,孪生的区域也不断变大。EBSD结果分析表明Mg-Al-Zn合金搅拌摩擦焊接头在压缩过程中产生的孪晶类型包括{1012}拉伸孪晶(86°)和{1011}压缩孪晶(56°),拉伸孪晶在协调接头塑性变形起主导作用。 展开更多
关键词 Mg-al-zn合金 搅拌摩擦焊 压缩变形 微观组织 拉伸孪晶
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Zn—Al系减振降噪(高阻尼)功能合金的热处理工艺研究
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作者 顾敏 高光慧 《金属热处理》 CAS CSCD 北大核心 1992年第2期7-12,共6页
本文从固溶处理温度、时间、固溶后冷却方式以及高温时效和自然时效工艺参数等对Zn—Al系ZDA系列四种新型减振降噪(高阻尼)功能合金中具有共析主成分的ZDA1和ZDA2合金的阻尼性能和机械性能的影响及其特征进行了研究。对通过热处理获得... 本文从固溶处理温度、时间、固溶后冷却方式以及高温时效和自然时效工艺参数等对Zn—Al系ZDA系列四种新型减振降噪(高阻尼)功能合金中具有共析主成分的ZDA1和ZDA2合金的阻尼性能和机械性能的影响及其特征进行了研究。对通过热处理获得高阻尼性能和改善机械性能的机理及热处理过程的固态相变进行了探讨。结果表明,控制固态相变析出相的数量、形状尺寸及其分布,可以充分开发合金的阻尼性能和强韧性。最佳热处理制度的选择,是保证共析相变充分进行、获得微细粒状、相界面易动的(α+β)复相组织的必要手段。 展开更多
关键词 zn-al合金 内耗 热处理 工艺
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共析成分Zn-Al合金的相变内耗和DSC的研究 被引量:5
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作者 陈秀梅 水嘉鹏 《材料科学与工程》 CSCD 1998年第3期17-21,共5页
利用低频内耗和示差扫描量热计(DSC)等技术研究了共析成分Zn-Al合金共析转变过程中的能量耗散问题,发现相变潜热和热滞均与相变的路径有关。相变内耗峰的峰高与频率倒数之间呈非线性关系,而对数减缩量与频率例数之间呈线性... 利用低频内耗和示差扫描量热计(DSC)等技术研究了共析成分Zn-Al合金共析转变过程中的能量耗散问题,发现相变潜热和热滞均与相变的路径有关。相变内耗峰的峰高与频率倒数之间呈非线性关系,而对数减缩量与频率例数之间呈线性关系。证明了共析转变过程的内耗不仅具有滞弹性的性质,而且具有线性粘弹性的性质,相变内耗峰主要是线性粘弹性内耗的贡献。用Maxwel模型对实验结果进行了解释。 展开更多
关键词 相变内耗 DSC 粘弹性 锌铝合金 共析成分
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Al-Zn-Mg合金搅拌摩擦焊接头显微组织与应力腐蚀行为研究 被引量:2
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作者 石康柠 李伟坡 梁志敏 《热加工工艺》 CSCD 北大核心 2017年第9期71-74,共4页
通过金相显微镜观察和慢应变速率拉伸(SSRT)试验研究Al-Zn-Mg合金搅拌摩擦焊接头的显微组织及在不同环境中的应力腐蚀行为,运用应力腐蚀指数评价材料的应力腐蚀敏感性。结果表明,接头焊核区为细小的等轴再结晶晶粒,靠近前进侧的焊核区... 通过金相显微镜观察和慢应变速率拉伸(SSRT)试验研究Al-Zn-Mg合金搅拌摩擦焊接头的显微组织及在不同环境中的应力腐蚀行为,运用应力腐蚀指数评价材料的应力腐蚀敏感性。结果表明,接头焊核区为细小的等轴再结晶晶粒,靠近前进侧的焊核区晶粒大小不均,呈羽毛状分层结构。当应变速率为10^(-6)s^(-1)时,FSW接头较母材应力腐蚀敏感性大,接头薄弱位置在靠近前进侧的焊核区。在3.5%NaCl溶液中,母材及FSW接头断裂形式均呈沿晶脆性断裂。 展开更多
关键词 al-zn-MG合金 搅拌摩擦焊 应力腐蚀敏感性
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时效过程Cu-Zn-Al合金阻尼特性的研究
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作者 张建安 刘锦文 《功能材料》 EI CAS CSCD 1994年第5期435-439,共5页
本文研究了热处理工艺对Cu-14.14Zn7.97Al(wt%)合金自然时效阻尼特性的影响。合金的阻尼性能依赖于分级淬火参数T_b及t_b且随时效时间的延长存在“峰效应”。T_b=200℃的分级淬火减少了时效过程中阻... 本文研究了热处理工艺对Cu-14.14Zn7.97Al(wt%)合金自然时效阻尼特性的影响。合金的阻尼性能依赖于分级淬火参数T_b及t_b且随时效时间的延长存在“峰效应”。T_b=200℃的分级淬火减少了时效过程中阻尼的损失,使合金处于稳定的高阻尼状态。X-ray衍射分析表明,合金在自然时效时其结构有序度发生改变且有α相析出。合金阻尼特性的波动与空位等点缺陷和界面的相互作用及α相的析出有关。 展开更多
关键词 铜锌铝合金 形状记忆合金 阻尼 时效 热处理
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Tribological behavior of friction stir processed SiP/ZA40 in-situ composites 被引量:1
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作者 F.RAJABI R.TAGHIABADI M.H.SHAERI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第11期3043-3057,共15页
The effect of friction stir processing(FSP)at different rotation speeds(400,630,800,and 1000 r/min)and traverse speeds(25 and 50 mm/min)on the tribological properties of a Si particle reinforced Zn−40Al−2Cu-based in-s... The effect of friction stir processing(FSP)at different rotation speeds(400,630,800,and 1000 r/min)and traverse speeds(25 and 50 mm/min)on the tribological properties of a Si particle reinforced Zn−40Al−2Cu-based in-situ composite was investigated.After preliminary optimization,800 r/min and 25 mm/min were selected as optimum FSP parameters.According to the results,multi-pass FSP improved the tribological properties.For instance,at an applied pressure of 0.75 MPa,the wear rate and average coefficient of friction(COF)of four-pass FSPed composite were lower than those of base composite by 53%and 50%,respectively.SEM examinations of worn surfaces,wear debris,and worn subsurfaces revealed that the intensive refinement and uniform distribution of microstructural phases,especially the coarse Si particles,reduced Si particles interspacing,and elimination of casting defects were the most important factors enhancing the substrate resistance against sliding-induced deformation.This led to the formation of stable tribolayers that improved the tribological properties. 展开更多
关键词 zn−40al−2Cu alloy SILICON COMPOSITE TRIBOLOGY friction stir processing
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