Correlation Between Tensile Strength and Hardness of Electron Beam Welded TC4-DT Joints

被引：30

作者：

Lu, Wei ^{[1
]}

Shi, Yaowu ^{[1
]}

Li, Xiaoyan ^{[1
]}

Lei, Yongping ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2013年 / 22卷 / 06期

关键词：

damage-tolerant Ti-6Al-4V; hardness; tensile strength; MECHANICAL-PROPERTIES; TI-6AL-4V;

D O I：

10.1007/s11665-012-0469-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Correlation between tensile strength and hardness for damage-tolerant Ti-6Al-4V (TC4-DT) alloy and its electron beam welded joints was investigated. Yield strength (YS), ultimate tensile strength (UTS) and strain hardening coefficient of base metal and weld metal were obtained using uniaxial tensile tests. Microhardness of the base metal, heat affected zone, and weld metal was measured. Then, the linear correlations among the yield strength, tensile strength, and hardness were proposed. Moreover, correlation between strain hardening coefficient and the ratio of YS to UTS (YS/UTS) was established. The results indicate that microhardness can be used to predict the YS and UTS of the TC4-DT welded joint successfully. In addition, the strain hardening coefficient can be predicted by the YS/UTS. The prediction of strength and strain hardening coefficient is in agreement with the experiments. The correlations are applicable and valuable for the strength prediction of narrow welded fusion zone and heat affected zone based on the microhardness measurement.

引用

页码：1694 / 1700

页数：7

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