Microstructure and mechanical properties of high-energy shot-peened Mg/Ti weldments

被引：12
|
作者：
Xu, Chuan [1 ]
Sheng, Guangmin [1 ]
Sun, Yongqiang [1 ]
Yuan, Xinjian [1 ]
Jiao, Yingjun [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Sha Zheng Jie 174, Chongqing 400044, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2018年 / 23卷 / 01期
基金：
中国国家自然科学基金;
关键词：
High-energy shot peening; microstructure; mechanical properties; magnesium; titanium; TIG welding-brazing; MAGNESIUM ALLOY; RESIDUAL-STRESSES; JOINTS;
D O I：
10.1080/13621718.2017.1325960
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work, high-energy shot-peening treatment was applied to the tungsten inert gas welded-brazed Mg/Ti weldments. The surface characteristics, residual stress distribution, microstructures and mechanical properties of HESP-treated Mg/Ti weldments were investigated. Results revealed that with the optimised peening time of 60s and the peening pressure of 0.15MPa, the elimination of surface voids and cracks, high compressive residual stress and surface strain strengthening of joint were introduced in the HESP-treated Mg/Ti weldments. The average tensile strength increased 24.5% to 241 MPa over the joints without HESP treatment (193.5 MPa) and fracture even occurred in the Mg alloy base metal.
引用
收藏
页码：28 / 34
页数：7
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