Microstructure and shape memory effect of laser welded Nitinol wires

Microstructure and shape memory effect of laser welded Nitinol wires
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激光焊接镍钛合金丝的显微组织和形状记忆效应

DOI:
10.1016/j.matlet.2018.11.141
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发表时间:
2019-03
期刊:
影响因子:
3
通讯作者:
Wang Wenxian
Wang Wenxian
中科院分区:
材料科学3区
文献类型:
--
作者:
Yao Runhua;Dong Peng;Liaw Peter K;Zhou Jun;Wang Wenxian

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在这项研究中,交叉镍钛合金丝连接激光焊接,并通过透射电子显微镜揭示了在各个区域的接头的显微组织。对接头进行了一系列的纳米压痕实验,并利用压痕尺寸在加热后的变化来评价形状记忆效应。热影响区的形状恢复率比母材高95%左右,而熔凝区的形状恢复率比母材高75%左右。
In this study, crossed Nitinol wires were joined by laser welding, and the microstructures of the joint in various zones were revealed by transmission electron microscopy. A series of nanoindentation experiments were performed across the joint, and the size changes of indentations after heating were used to evaluate the shape memory effects. Compared to BM, HAZ retained about the 95% shape recovery, higher than FZ, which retained about the 75% recovery rate.
激光微焊接镍钛诺丝的微观结构表征
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