Microstructure and mechanical properties of gas tungsten arc welded Cu-Al-Mn shape memory alloy rods

被引：84
|
作者：
Oliveira, J. P. [1 ]
Crispim, B. [1 ]
Zeng, Z. [2 ]
Omori, T. [3 ]
Braz Fernandes, F. M. [4 ]
Miranda, R. M. [1 ]
机构：
[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Engn Mecan & Ind, UNIDEMI, Caparica, Portugal
[2] Univ Elect Sci & Technol China, Sch Mech & Elect Engn, Chengdu, Sichuan, Peoples R China
[3] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi, Japan
[4] Univ Nova Lisboa, Mat Sci Dept, CENIMAT i3N, Fac Ciencias & Tecnol, Campus Caparica, P-2829516 Caparica, Portugal
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2019年 / 271卷
基金：
中国国家自然科学基金;
关键词：
Shape memory alloys; Characterization; Phase transformations; Welding; Superelasticity; Functional fatigue; NITI;
D O I：
10.1016/j.jmatprotec.2019.03.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Large diameter rods of Cu-Al-Mn shape memory alloy were gas tungsten arc welded. The microstructural evolution was studied by electron microscopy techniques and its impact on the mechanical and functional response of the welded joints was assessed. The fusion zone exhibited a mixture of alpha and beta phases, while the base material was composed only by the parent beta phase. The refined grain structure of the fusion zone increased the material ductility and can improve the functional fatigue resistance of the welded joint when compared to the original base material.
引用
收藏
页码：93 / 100
页数：8
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