Variable amplitude fatigue tests at high frequency hammer peened welded ultra high strength steel S1100

被引：8
|
作者：
Berg, Joern [1 ]
Stranghoener, Natalie [1 ]
Kern, Andreas [2 ]
Hoevel, Marion [2 ]
机构：
[1] Univ Duisburg Essen, Inst Met & Lightweight Struct, D-45141 Essen, Germany
[2] ThyssenKrupp Steel Europe AG, Heavy Plate Unit, Qual Affairs Res & Dev, D-47259 Duisburg, Germany
来源：
21ST EUROPEAN CONFERENCE ON FRACTURE, (ECF21) | 2016年 / 2卷
关键词：
high frequency hammer peening; post weld treatment; ultra high strength steels; fatigue life improvement; variable amplitude loading;
D O I：
10.1016/j.prostr.2016.06.443
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Post weld treatment methods such as high frequency hammer peening (HFHP) increase the fatigue strength of welded details mainly due to modifying the residual stress state and extending the period of crack initiation. Recently performed fatigue tests at steel grades S960, S1100 and S1300 with constant amplitude loading showed a large increase of fatigue life due to the application of HFHP. However, the influence of spectrum type loading including pre- and overloads at HFHP treated notch details has to be considered as well. For this reason, fatigue tests with operational-like variable amplitude loading at welded notch details of transversal stiffener and butt weld of S1100 with untreated and HFHP treated weld toe condition have been performed showing an increase of fatigue life due to HFHP treatment even for maximum stresses close to or above the yield strength. Copyright (C) 2016 The Authors. Published by Elsevier B.V.
引用
收藏
页码：3554 / 3561
页数：8
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