Effect of welding defects on plastic behaviour and fatigue lifetime of friction stir welded Al-Cu-Li alloy

摘要：

　　The effects of joint line remnant (JLR),kissing bond (KB),and clearance between the sheets (Gap) on tensile and fatigue properties of 2198-T851 friction stir welds have been quantitatively evaluated with respect to a reference weld made using one single sheet.The JLR has no significant influence in the investigated conditions.KB and Gap-induced defects do not significantly influence plastic yield but may induce premature crack initiation by ductile tearing and intergranular decohesions respectively.A critical value for KB opening (280 MPa),a threshold value for fatigue crack propagation from the KB (1 MPa√m) and crack growth rates consistent with literature data have been determined.

关键词： Friction stir welds Welding defects Tensile properties Fatigue resistance

作者: Thomas Le Jolu Thilo F. Morgeneyer Anne Denquin Anne-Fran(c)oise Gourgues-Lorenzon

作者单位: MINES ParisTech,Centre des Matériaux,UMR CNRS 7633,BP 87,91003 Evry cedex,France;Now at CEA Saclay,9 MINES ParisTech,Centre des Matériaux,UMR CNRS 7633,BP 87,91003 Evry cedex,France Onera BP 72-29 Avenue de la Division Leclerc 92322 CHATILLON cedex,France

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）