Research progress in dissimilar welding of Nitinol shape memory alloy to Titanium alloy

CHEN Yuhua; DENG Huaibo; XU Mingfang; JI Di

doi:10.7512/j.issn.1001-2303.2020.09.18

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Research progress in dissimilar welding of Nitinol shape memory alloy to Titanium alloy
Vol. 50, Issue 9, Pages: 177-185(2020)
Published：2020
DOI： 10.7512/j.issn.1001-2303.2020.09.18
稿件说明：

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DOI：

CHEN Yuhua, DENG Huaibo, XU Mingfang, et al. Research progress in dissimilar welding of Nitinol shape memory alloy to Titanium alloy[J]. Eletric Welding Machine2020, 50(9): 177-185. DOI： 10.7512/j.issn.1001-2303.2020.09.18.

摘要

镍钛形状记忆合金(Nitinol shape memory alloy

NiTi SMA)具有卓越的形状记忆效应(Shape memory effect

SME)和超弹性(Super-elastic

SE)

在航空航天、人工智能及生物医疗等领域得到了广泛应用。为了控制成本

获得多功能复杂构件或开发新产品

NiTi SMA/Ti6Al4V异种材料的焊接受到关注。针对NiTi SMA/Ti6Al4V异种材料焊接过程中的关键问题

总结了熔焊、扩散焊和钎焊等方法的研究进展

比较了不同焊接方法对焊接结果的影响。分析认为

抑制NiTi SMA/Ti6Al4V异种材料接头界面生成脆性金属间化合物是影响接头力学性能的关键

添加中间层有利于减少脆性金属间化合物。

Abstract

With excellent shape memory effect（SME） and super-elastic（SE）

nitinol shape memory alloy（NiTi SMA） was widely used in the fields of aerospace

artificial intelligence and biomedicine

etc. To control costs

and obtain multi-functional components or exploit novel products

as an essential method

dissimilar welding of NiTi SMA/Ti6Al4V alloys was concerned. The key problems in welding of NiTi SMA/Ti6Al4V were reviewed. The research progress in fusion welding

diffusion welding and brazing methods was summarized

and the effects of different welding methods on welding results were compared. Diminishing the brittle intermetallic compounds in NiTi SMA/Ti6Al4V interface was the key factor to affect the mechanical properties of joints. One useful way to inhibit intermetallic compounds in interface of NiTi SMA/Ti6Al4V joints was addition middle layer as a barrier.