Fatigue Crack Propagation Behavior of As-Extruded AZ31B Mg Alloy Welding Joint

摘要：

The fatigue crack propagation rate of an as-extruded AZ31B magnesium alloy welding joint is studied. The welding joint is parallel T-L(H) and vertical L-T(H) at the notch direction parallel to the extruded direction. Results indicate that the crack propagation direction is parallel to the extrusion direction for L-T(W); fatigue crack propagation rate is a rapid-slow process; T-L(H) is parallel to the notch direction; and L-T(H) is divided into two states (i.e., parallel to or angularly deflected towards the notch direction). Crack propagation follows an initially rapid and then subsequently slow pattern. The crack tip propagates by both transgranular and intergranular fractures. The fatigue fracture, which is brittle, consists of a quasi-cleavage.

关键词： az31b magnesium alloy welding joint fatigue crack propagation rate brittle fracture

作者: H.X.Zhang W.X.Wang P.Y.Liang Y.H.Wei Z.F.Yan H.Z.Li

作者单位: College of Material Science and Engineering of Taiyuan University of Technology, Taiyuan, 030024 P.R.China

会议类型: 国际会议

会议名称: The 3rd International Conference on Power Beam Processing Technologies(2010 高能束流加工技术国际会议 ICPBPT 2010)

会议地点: 北京

会议语种:英文

页码: 119-124

在线出版日期: 2010-10-25（万方平台首次上网日期，不代表论文的发表时间）