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张效宁

作品数:2 被引量:10H指数:2
供职机构:上海交通大学材料科学与工程学院金属基复合材料国家重点实验室更多>>
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Beta Ti-9.8Mo-3.9Nb-2V-3.1Al合金的热压缩变形行为研究被引量:2
2009年
采用Gleeble-3500热模拟机对Ti-9.8Mo-3.9Nb-2V-3.1Al合金进行了室温~800℃范围内的热压缩变形试验,应变速率0.1 s-1.结果显示,在室温~300℃和500~800℃范围内,合金的变形抗力随温度的升高而降低,但是在300~500℃出现了异常的变形抗力随温度升高而升高的现象.最后讨论了热压缩变形行为对于试验结果的影响.
张效宁宋杰范志国
关键词:TI-MO合金热压缩变形析出相
Effects of second phases on mechanical properties and martensitic transformations of ECAPed TiNi and Ti-Mo based shape memory alloys被引量:8
2012年
TiNi and Ti-based shape memory alloys were processed by equal channel angular pressing (ECAP) at 673-773 K along Bc route to obtain ultrafine grains for increasing the strength of parent phase and improving the functional properties. The effects of both thermodynamically stable and metastable second phases on the mechanical properties and martensitic transformations of these alloys were investigated. It is found that thermodynamically stable Ti2Ni phase has no effect on martensitic transformation and superelasticity of Ti-rich TiNi alloy, thermodynamically stable α phase is harmful for ductility of Ti-Mo-Nb-V-Al alloy, but metastable Ti3Ni4 phase is effective for R phase transformation, martensitic transformation and superelasticity of Ni-rich TiNi alloy. The mechanisms of the second phases on the martensitic transformations and mechanical properties were discussed.
宋杰王立明张效宁孙小刚江鸿范志国谢超英吴明雄
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