Microstructure and properties of electron beam welded joint of Ti-22Al-25Nb/TC11

被引：60

作者：

Tan, Lijun ^{[1
]}

Yao, Zekun ^{[1
]}

Zhou, Wei ^{[1
]}

Guo, Hongzhen ^{[1
]}

Zhao, Yan ^{[1
]}

机构：

[1] NW Polytech Univ, Sch Mat & Engn, Xian 710072, Peoples R China

来源：

AEROSPACE SCIENCE AND TECHNOLOGY | 2010年 / 14卷 / 05期

关键词：

Electron beam welding (EBW); Titanium aluminides; Titanium alloy; Microstructure;

D O I：

10.1016/j.ast.2010.02.002

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Dissimilar joining of Ti-22Al-25Nb alloy and an alpha + beta titanium alloy TC11 were carried out using electron beam welding technique. The microstructure, microhardness, and mechanical properties of the joint have been investigated. The results show that EBW can be used the joining of dissimilar TC11 alloy and Ti-22Al-25Nb alloy. The microstructure of the heat affected zone (HAZ) of TC11 alloy is martensite alpha' phase, a large quantity of O/alpha(2) particles precipitate in the weld and the microstructure of the HAZ of Ti-22Al-25Nb alloy is B2 phase. The room-temperature tensile strength of the joint is higher than that of the TC11 alloy base, and the impact toughness value of the joint is found to be about 42% of that of the TC11 alloy base. Crown Copyright (C) 2010 Published by Elsevier Masson SAS. All rights reserved.

引用

页码：302 / 306

页数：5

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