Fatigue Crack Behavior of Welds in q460 Bridge Steel

摘要：

In the case of bridge structure, moreover, the fatigue crack growth behavior of weld joint of q460 bridge steel is very important for estimating life-time in terms of a crack length in weld joint. In this context , fatigue crack growth behavior of weld joint of q460 bridge steel has been investigated at room temperature using SEM specimens machined from weld metal (WM),heat affected zone(HAZ) and mother metal(BM). The variation of fatigue crack growth rate(da/dN) with stress intensity factor range (△K) for WM.HAZ and BM is discussed within the Paris region. It is shown that fatigue crack growth rate of WM is the slowest in tree parts and the acicular ferrite in WM is contribute to slowing up the growth of fatigue crack.

关键词： fatigue crack behavior weld bridge steel

作者: JIA Kun-ning WANG Hai-dong JIANG Qiu-yu

作者单位: Changchun Institute of Technology,Electrical and mechanical department,ChangchunJilin 130012,China

会议类型: 国际会议

会议名称: The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)

会议地点: 北京

会议语种:英文

页码: 122-125

在线出版日期: 2009-10-27（万方平台首次上网日期，不代表论文的发表时间）