Effects of the Heterogeneity in the Electron Beam Welded Joint on Mechanical Properties of Ti6Al4V Alloy

被引：22

作者：

Liu, Jing ^{[1
]}

Gao, Xiao-Long ^{[1
]}

Zhang, Lin-Jie ^{[1
]}

Zhang, Jian-Xun ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2015年 / 24卷 / 01期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

electron beam welding; fatigue properties; microstructure; Ti6Al4V alloy; CYCLE FATIGUE BEHAVIOR; TI-6AL-4V ALLOY; MICROSTRUCTURAL CHARACTERISTICS; IMPACT TOUGHNESS; CRACK GROWTH; TITANIUM; PLASTICITY;

D O I：

10.1007/s11665-014-1251-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aim of this investigation was to evaluate the effect of microstructure heterogeneity on the tensile and low cycle fatigue properties of electron beam welded (EBW) Ti6Al4V sheets. To achieve this goal, the tensile and low cycle fatigue property in the EBW joints and base metal (BM) specimens is compared. During the tensile testing, digital image correlation technology was used to measure the plastic strain field evolution within the specimens. The experimental results showed that the tensile ductility and low cycle fatigue strength of EBW joints are lower than that of BM specimens, mainly because of the effect of microstructure heterogeneity of the welded joint. Moreover, the EBW joints exhibit the cyclic hardening behavior during low fatigue process, while BM specimens exhibit the cyclic softening behavior. Compared with the BM specimens with uniform microstructure, the heterogeneity of microstructure in the EBW joint is found to decrease the mechanical properties of welded joint.

引用

页码：319 / 328

页数：10

共 34 条

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