Improvement of fatigue limit and rendering crack harmless by peening for rolled steel containing a crack at the weld toe zone

被引：0

作者：

Houjou, Keiji ^{[1
]}

Takahashi, Koji ^{[1
]}

Ando, Kotoji ^{[1
]}

Sekiguchi, Yuji ^{[1
]}

机构：

[1] Oyama National College of Technology, Dept. of Mechanical Engineering, 323-0806

来源：

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 2013年 / 79卷 / 797期

关键词：

Crack; Fatigue; Peening; Rendering crack harmless; Weld zone;

D O I：

10.1299/kikaia.79.110

中图分类号：

学科分类号：

摘要：

This study describes an investigation of the effect of peening on the fatigue limit of rolled steel containing a crack at the weld toe. 3-point bending specimens with a weld zone were prepared for fatigue test. An artificial semi-circular slit was made into the weld toe, and subsequently the weld toe was peened by needle-peening. Using those specimens, bending fatigue tests were carried out. The following results were obtained. (1) The fatigue limits of specimens containing a slit improved considerably by peening. (2) The fracture occurred from outside the slit. Moreover, the specimens recovered to fatigue limits up to that of non-slit specimens. (3) A slit of 0.4-1.2 mm in depth was rendered harmless by the peening. © 2013 The Japan Society of Mechanical Engineers.

引用

页码：110 / 114

页数：4

共 44 条

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