Fatigue Strength Improvement of Lap Welded Joints by Low Transformation Temperature Welding Wire — Superior Improvement with Strength of Steel

被引：0
|
作者：
A. Ohta
N. Suzuki
Y. Maeda
S. J. Maddox
机构：
[1] National Institute for Materials Science,
[2] The Welding Institute,undefined
来源：
Welding in the World | 2003年 / 47卷 / 3-4期
关键词：
Fatigue; Welding; Residual Stress; Fatigue Strength; Fatigue Crack Growth;
D O I：
10.1007/BF03266382
中图分类号：
学科分类号：
摘要：
The potential improvement in fatigue performance of lap welded joints in 2 mm thick 540MPa and 780MPa class steels from the introduction of compressive residual stress by welding with low transformation temperature (LTT) welding wire was investigated. Comparative fatigue tests in bending at a stress ratio of R=0 on specimens made with conventional and LTT welds confirmed that the fatigue performance of such thin specimens was improved, particularly in the long-life regime. Furthermore, the benefit was greatest in the high-strength steel, the improvement in fatigue strength at 107 cycles being 1.4 times for 540MPa steel and 1.6 times for 780MPa steel.
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收藏
页码：38 / 43
页数：5
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