Effect of Post Weld Heat Treatment on Mechanical and Corrosion Behaviors of NiTi and Stainless Steel Laser-Welded Wires

被引：1
|
作者：
G. R. Mirshekari
A. Saatchi
A. Kermanpur
S. K. Sadrnezhaad
机构：
[1] Isfahan University of Technology,Department of Materials Engineering
[2] University of Wisconsin-Madison,Department of Materials Science and Engineering
[3] Sharif University of Technology,Department of Materials Science and Engineering
来源：
Journal of Materials Engineering and Performance | 2016年 / 25卷
关键词：
corrosion behavior; laser welding; mechanical properties; NiTi shape memory alloy; post weld heat treatment; stainless steel;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Effects of post weld heat treatment (PWHT) on mechanical properties and corrosion behavior of NiTi shape memory wire, laser welded to the 304 stainless steel wire were investigated. The results showed that PWHT at 200 °C increased corrosion resistance and tensile strength of the joint up to ~1.8 times that of the as-weld joint, with no heat treatment. On the contrary, precipitation of neoteric intermetallic compounds like Fe2Ti, Cr2Ti, FeNi, Ni3Ti, and Ti2Ni in the welded region deteriorated these properties, when PWHT was conducted at 400 °C. Due to the vital effects of the PWHT performed after the laser welding, careful control of the PWHT temperature was found to be a prerequisite for achievement of desirable properties in the dissimilar NiTi-304 stainless steel laser-welded wires.
引用
收藏
页码：2395 / 2402
页数：7
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