Deformability and nanostructuring of TiNi shape-memory alloys during electroplastic rolling
Deformability and nanostructuring of TiNi shape-memory alloys during electroplastic rolling
复制标题
DOI：
10.1016/j.msea.2008.01.094
复制
发表时间：
2009-03-15
期刊：
影响因子：
6.4
通讯作者：
Stolyarov, V. V.
中科院分区：
文献类型：
--
作者：
Stolyarov, V. V.
研究了冷轧过程中电脉冲电流对粗晶和超细晶富镍TiNi合金变形性能、纳米结构形成和力学行为的影响。通过有电流的冷轧处理的超细晶粒样品具有高于没有电流的断裂应变（e = 0.59）的断裂应变（e = 1.91）。由于在电流下冷轧并随后在400-450摄氏度下退火，在两种合金中形成纳米结构，这导致屈服和极限应力的显著提高。结果表明，电塑性轧制的效率取决于合金的纯度。(C)2008 Elsevier B. V.保留所有权利。
Electropulse current effects during cold rolling on deformability, nanostructure formation and mechanical behavior in coarse-grained (CG) and ultrafine-grained (UFG) TiNi alloys enriched by nickel are investigated. An ultrafine-grained sample processed by cold rolling with current has a fracture strain (e = 1.91) which is higher than that without a current (e = 0.59). As a result of cold rolling with a current and a subsequent annealing at 400-450 degrees C, nanostructure is formed in both alloys, which leads to a significant enhancement of yield and ultimate stresses. It is shown that the efficiency of electroplastic rolling depends on the purity of the alloys. (C) 2008 Elsevier B.V. All rights reserved.