杨义李阁平吴松全李玉兰杨柯
材料研究学报
Gum Metal特指一类符合某些特定电子状态参数和成分条件的钛合金, 具有很多特异的性能, 如室温超塑性、低加工硬化率, 经历超过90%的冷旋锻后具有高强度、非线性超弹性、低的杨氏模量, 以及Invar和Elinvar性能等。自Gum Metal问世以来, 其特异性能的机理和变形机制便一直存在很大...
关键词:
金属材料
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alloy design
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composition
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preparation process
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deformation mechanism
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null
王全柱
,
张迎元
材料开发与应用
对采用熔体发泡法制造的不同密度泡沫铝进行了准静态压缩试验、拉伸试验和弯曲试验.结果表明,泡沫铝的压缩特性曲线包括线弹性变形区、平台区和密实化区.试样的高宽比H/D明显影响压缩应力-应变曲线.当H/D较小时,平台应力曲线较平滑;当H/D较大时,平台应力曲线剧烈波动,呈显著的锯齿状.且在试样中间部位出现...
关键词:
泡沫铝
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压缩
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拉伸
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冷弯
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变形机制
许峰
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张喜燕
,
程佑铭
稀有金属材料与工程
利用动态塑性变形(DPD)和准静态压缩变形(QSC)技术对纯钛圆柱样品进行对比压缩试验,研究了不同应变速率下纯钛形变孪晶和微结构演变.结果发现:2种变形方式的变形机制相似,低应变时以形变孪生为主,孪生饱和后转变为位错滑移主导;高应变速率促进了形变孪晶的产生,激发{1124}压缩孪晶的形成,同时使变形...
关键词:
应变速率
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纯钛
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变形机制
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形变孪晶
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绝热剪切带
王翔
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宋立新
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曲淼
,
任亮
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张明耀
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张会轩
高分子材料科学与工程
采用双螺杆挤出机将甲基丙烯酸缩水甘油酯(GMA)同时接枝到乙烯-辛烯共聚物(POE)和线性低密度聚乙烯LLDPE上,而后将接枝产物与聚对苯二甲酸丁二醇酯(PBT)反应性共混,通过改变POE/LLDPE比例确立了PBT/(POE/LLDPE)-g-GMA共混物分散相的最佳组成.以此为基础考察了GMA加...
关键词:
PBT/(POE/LLDPE)-g-GMA
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接枝
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反应共混
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冲击强度
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形变机理
W. H. Tian
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S.L. Hu and M. Nemoto(Department of Materials Physics
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University of Science and Technology Beijing
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Beijing 100083
,
China)(Department of Materials Forming
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University of Science and Technology Beijing
,
Beijing 100083
,
China)(Department of Materials Science and Engineering
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Faculty of Engineering
,
Kyushu University
,
Fukuoka 812
,
Japan)
金属学报(英文版)
The Co3 Ti phase hardens appreciably by the fine precipitation of disordered fcc Co-rich phase upon aging after quenching from solution annealing temperature. Transmission electron microscope (TEM)observations revealed that the precipitates are platelet in shape, lying nearly parallel to the {100} p...
关键词:
Co_3 Ti
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null
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null
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null
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null
W.H. Tian
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S.L. Hu and M. Nemoto(1) Department of Materials Physics
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University of Science and Technology Beijing
,
Beijing 100083
,
China 2) Department of Materials Forming
,
University of Science and Technology Beijing
,
Beijing 100083
,
China 3) Department of Materials Science and Engineering
,
Faculty of Engineering
,
Kyushu University
,
Fukuoka 812
,
Japan)Manuscript received in revised form 12 October 1998
金属学报(英文版)
The effect of Cr addition on the microstructures and mechanical properties of NiAl inermetallic alloys containing 4 to 8 mol% Cr has been characterized. It is shown that Cr is not only an efficient soild solution strengthener in NiAl, it is also an efficient precipitation Strengthener by fine disper...
关键词:
NiAl
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null
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null
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null
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null
