Fatigue crack growth in a metastable austenitic stainless steel

摘要：

　　Fatigue crack growth in a metastable austenitic stainless steel was investigated in thin specimen under positive stress ratio.Annealed conditions were used to test the influence of the microstructure.The influence of load ratio on propagation threshold and propagation behavior was analyzed using the Elbers closure approach,the Donald and Paris partial crack closure and the empirical Kujawski (ΔK?Kmax)α parameter.Results show that load ratio effects are not completely explained by these approaches.It was found that the threshold of the material in the annealed condition depends on the load history,especially when the load ratio is low.It seems that the amount of martensite transformation is responsible for the observed differences in fatigue crack growth resistance.

关键词： Fatigue crack propagation thresholdMetastable austenitic stainless steel

作者: D.F.Martelo M.D.Chapetti

作者单位: Laboratory of Experimental Mechanics(LABMEX)Research Institute for Material Science(INTEMA)CONICET-Faculty of Engineering,National University of Mar del Plata J.B.Justo 4302,7600 Mar del Plata,Argentina

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-10

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）