Defocusing Effects of Laser Beam on the Weldability of Powder Metallurgy Ti-Based Shape Memory Alloys

被引：7

作者：

Bahador, Abdollah ^{[1
]}

Hamzah, Esah ^{[1
]}

Kondoh, Katsuyoshi ^{[2
]}

Abubakar, T. ^{[1
]}

Yusof, Farazila ^{[3
]}

Saud, Safaa N. ^{[4
]}

Ibrahim, Mustafa K. ^{[1
]}

Ezazi, M. A. ^{[3
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Utm Johor Bahru 81310, Johor, Malaysia

[2] Osaka Univ, JWRI, 11-1 Mihogaoka, Ibaraki, Osaka 5670047, Japan

[3] Univ Malaya, Dept Mech Engn, Fac Engn, Kuala Lumpur 50603, Malaysia

[4] Management & Sci Univ, Fac Informat Sci & Engn, Shah Alam 40100, Malaysia

来源：

ADVANCES IN MATERIAL & PROCESSING TECHNOLOGIES CONFERENCE | 2017年 / 184卷

关键词：

Fiber laser welding; Shape memory alloys; powder metallurgy; microwave sintering; furnace sintering; BEHAVIOR; MICROSTRUCTURE; COMPACT; STEEL;

D O I：

10.1016/j.proeng.2017.04.087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of defocusing distance of the fiber laser welding on Ti-51at%Ni, Ti-28%atNb and Ti-30at%Ta shape memory alloys (SMAs) was investigated. These alloys were produced by powder metallurgy (P/M) and sintered by furnace and microwave processes. The experimental results showed that the furnace-sintered Ti-Ni welds have the maximum porosity density and the lowest weld quality. While, the microwave sintered alloys of Ti-Nb and Ti-Ta SMAs presented better weldability, even though porosities were still observed. Ti-Ta SMA showed the best welding quality compared with the other welded joints. It can be concluded that porosities play important role in the welding of powder metallurgy alloys and in order to achieve high-quality welds, the porosities should be minimized. (C) 2017 Published by Elsevier Ltd.

引用

页码：205 / 213

页数：9

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