Induction Butt Welding Followed by Abnormal Grain Growth: A Promising Route for Joining of Fe–Mn–Al–Ni Tubes
Induction Butt Welding Followed by Abnormal Grain Growth: A Promising Route for Joining of Fe–Mn–Al–Ni Tubes
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DOI：
10.1007/s40830-019-00261-2
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发表时间：
2020-01
影响因子：
2.2
通讯作者：
M. Vollmer;D. Baunack;D. Janoschka;T. Niendorf
中科院分区：
文献类型：
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作者：
M. Vollmer;D. Baunack;D. Janoschka;T. Niendorf
本文主要研究了Fe-Mn-Al-Ni管材的感应对接焊接。通过比较焊接过程中不同温度和力的不同工艺路线，可以找到实现无缺陷焊接的合适工艺参数。此外，通过随后的促进异常晶粒长大的循环热处理完全重置热影响区的组织是可行的。最大应变为6%的拉伸测试显示，最终微结构条件具有良好的伪弹性特性。研究首次表明，叠加压力焊接非常适合Fe-Mn-Al-Ni形状记忆合金的连接。此外，还揭示了循环热处理引起的异常晶粒长大可以与构件的几何形状无关。
The present study focuses on induction butt welding of Fe–Mn–Al–Ni tubes. By comparing different processing routes, characterized by different temperatures and forces during welding, it was possible to find adequate process parameters for realization of defect-free joints. Moreover, it was feasible to fully reset the microstructure prevailing in the heat-affected zone by a subsequent cyclic heat treatment promoting abnormal grain growth. Tensile testing up to a maximum strain of 6% revealed excellent pseudoelastic properties of the final microstructural condition. The present study shows for the first time that welding with superimposed pressure is well suited for joining of Fe–Mn–Al–Ni shape memory alloys. Furthermore, it is revealed that abnormal grain growth induced by a cyclic heat treatment can be applied independently of the geometry of the component.