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首页> 外文会议>International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials(ISMANAM 2004); 20040822-26; Sendai(JP) >Metastable nanostructured SPD Ti-Ni alloys with unique properties
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Metastable nanostructured SPD Ti-Ni alloys with unique properties

机译：具有独特性能的亚稳态纳米SPD Ti-Ni合金

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摘要

Ti_(50)Ni_(25)Cu_(25) alloy in amorphous state, fabricated by rapid quenching and coarse-grained Ti_(49.4)Ni_(50.6) alloy were subjected to severe plastic deformation (SPD) in order to produce nanocrystalline states. In the first case, we used SPD-controlled nanocrystallization of the initial amorphous alloy Ti_(50)Ni_(25)Cu_(25). In the second case, the nanostructures were obtained through microstructural refinement by SPD in the initial coarse-grained alloy Ti_(49.4)Ni_(50.6). The fabrication of nanostructures has a strong impact on martensite transformations. Martensite transformations are suppressed at the grain size below the critical point (～100 nm). The nanostructured states with the size of 100-200 nm demonstrate unique mechanical and functional properties, namely very high strength and ductility, as well as increased reactive stress and reversible strain.
机译：通过快速淬火和粗晶粒化的Ti_（49.4）Ni_（50.6）合金制备的非晶态Ti_（50）Ni_（25）Cu_（25）合金经历了严重的塑性变形（SPD），以产生纳米晶态。在第一种情况下，我们使用了初始非晶态合金Ti_（50）Ni_（25）Cu_（25）的SPD控制纳米晶化。在第二种情况下，通过SPD对初始粗晶粒合金Ti_（49.4）Ni_（50.6）的微结构细化获得了纳米结构。纳米结构的制造对马氏体相变有很大的影响。在低于临界点（〜100 nm）的晶粒尺寸下，马氏体相变得到抑制。尺寸为100-200 nm的纳米结构态表现出独特的机械和功能特性，即非常高的强度和延展性，以及增加的反应应力和可逆应变。

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