假弹性
形状记忆合金
钛镍合金
材料科学
微观结构
无扩散变换
相(物质)
极限抗拉强度
纹理(宇宙学)
马氏体
转化(遗传学)
复合材料
冶金
计算机科学
化学
有机化学
人工智能
图像(数学)
基因
生物化学
作者
Ze Pu,Dong Du,Kaiming Wang,Lan Guan,Dongqi Zhang,Xiebin Wang,Baohua Chang
标识
DOI:10.1016/j.msea.2021.141077
摘要
In this work, NiTi shape memory alloys with tensile superelasticity are fabricated by thetechnology of wire-based vacuum additive manufacturing and post heat treatment. This work comprehensively investigates the microstructure, phase transformation behavior and tensile superelasticity, which are all found to be dependent of building height. The as-built NiTi part demonstrates columnar crystals and strong [001] texture along the building direction. For as-built NiTi part, the top region shows lower phase transformation temperatures and better superelasticity, while the middle and bottom regions exhibit higher phase transformation temperatures and poor superelasticity. After heat treatment, the transformation behavior and superelasticity on the building height can be adjusted to be uniform. The results show that wire-based vacuum additive manufacturing is very promising to produce dense and pure NiTi functional structures with good working condition adaptability.
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