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：

Bend tests; Carbon manganese steels; Comparisons; Composition; Compression; Crack propagation; Fatigue cracks; Fatigue strength; Fatigue tests; Filler materials; GMA welding; Lap joints; Lifetime; Residual stresses; Sheet; Solid filler wire; Stress; Welded joints;

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.

引用

页码：38 / 43

页数：5

共 10 条

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