Electron beam welding of Fe–Mn–Al–Ni shape memory alloy: Microstructure evolution and shape memory response
Electron beam welding of Fe–Mn–Al–Ni shape memory alloy: Microstructure evolution and shape memory response
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DOI：
10.1142/s1793604717500436
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发表时间：
2017-08
影响因子：
1.3
通讯作者：
P. Krooß;J. Günther;Lars Halbauer;M. Vollmer;A. Buchwalder;R. Zenker;H. Biermann;T. Niendorf
中科院分区：
文献类型：
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作者：
P. Krooß;J. Günther;Lars Halbauer;M. Vollmer;A. Buchwalder;R. Zenker;H. Biermann;T. Niendorf
本文报道了Fe-Mn-Al-Ni形状记忆合金（SMA）电子束焊接后，异常晶粒生长（AGG）对其组织演变的影响。将多晶片状材料进行eb焊接，并进行之前研究的循环热处理，分别诱导AGG和竹状组织。采用光学显微镜和电子显微镜对循环热处理后的主要组织进行了表征。为了表征AGG后的功能特性，进行了负载增加试验。目前的研究结果清楚地表明，Fe-Mn-Al-Ni SMA在EB焊接和随后的后热处理后可以获得良好的形状记忆响应。这些结果进一步证实了传统工艺路线在Fe-Mn-Al-Ni SMA中的潜在应用。
The present study reports on the impact of abnormal grain growth (AGG) on the microstructural evolution following electron beam (EB) welding of Fe–Mn–Al–Ni shape memory alloy (SMA). Polycrystalline sheet-like material was EB-welded and a cyclic heat treatment, studied in previous work, was conducted for inducing AGG and a bamboo-like microstructure, respectively. Optical and electron microscopy were carried out to characterize the prevailing microstructure upon cyclic heat treatment. For characterization of the functional properties following AGG, a load increase test was conducted. The current results clearly show that good shape memory response can be obtained in Fe–Mn–Al–Ni SMA upon EB welding and subsequent post-heat treatment. These results further substantiate the potential use of conventional processing routes for Fe–Mn–Al–Ni SMA.