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Two-stage superelasticity of a Ce-added laser-welded TiNi alloy

机译:添加铈的激光焊接TiNi合金的两阶段超弹性

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摘要

Microstructure, phase transformation and stress-strain behaviors of a Ce-added laser welded TiNi alloy have been studied. An Nd:YAG laser was used for butt fusion of two Ti-50.9Ni alloy plates with a (Ti-50.9Ni)-5Ce stripe pre-assembled between their joint. Microstructure, phase constitution, phase transformation and stress-strain behavior of several TiNi alloy specimens were researched with SEM, XRD, DSC and tensile test, respectively. Unlike the typical monotonous superelasticity of base metal and Ce-free welded TiNi, the Ce-added welded TiNi specimen shows a peculiar two-stage superelasticity. Based on results of SEM, XRD and DSC tests, a mechanism for the two-stage superelasticity has been discussed.
机译:研究了掺铈激光焊接TiNi合金的组织,相变和应力应变行为。 Nd:YAG激光器用于对两块Ti-50.9Ni合金板进行对接熔接,并在两块Ti-50.9Ni合金之间预先组装了(Ti-50.9Ni)-5Ce条纹。分别用SEM,XRD,DSC和拉伸试验研究了几种TiNi合金试样的组织,相组成,相变和应力应变行为。与贱金属和无Ce焊接的TiNi的典型单调超弹性不同,添加Ce的焊接TiNi试样显示出独特的两阶段超弹性。基于SEM,XRD和DSC测试结果,讨论了两阶段超弹性的机理。

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