Fatigue strength improvement of lap joints of thin steel plates for automobile use by using low transformation temperature welding material

被引：0

作者：

Ohta, A. ^{[1
]}

Matsuoka, K. ^{[1
]}

Nguyen, N.T. ^{[1
]}

Maeda, Y. ^{[1
]}

Suzuki, N. ^{[1
]}

机构：

[1] National Inst. for Materials Sci., Sengen, Tsukuba, 305-0047, Japan

来源：

Zairyo/Journal of the Society of Materials Science, Japan | 2001年 / 50卷 / 10期

关键词：

Austenite - Compressive stress - Cooling - Fatigue of materials - Low temperature effects - Martensite - Phase transitions - Plate metal - Residual stresses - Strain - Welding - Welds;

D O I：

10.2472/jsms.50.1086

中图分类号：

学科分类号：

摘要：

The fatigue strength of lap welded joints of thin steel plate for automobile use was improved by using low transformation temperature welding material which induced the compressive residual stress around welded part. The transformation of welding material from austenite to martensite begins around 200°C and finishes around room temperature. The expansion of weld metal due to the transformation was constrained by the surrounding base metal, and the compressive residual stress is induced in the as welded condition. The mean stress effect due to this compressive residual stress improved the fatigue strength.

引用

页码：1086 / 1090