As-extruded AZ31B magnesium alloy fatigue crack propagation behavior
The fatigue crack propagation rate of an as-extruded AZ31B magnesium alloy was studied. Compact tension ”C(T)” of the specimens at the incision direction parallel (T-L), vertical (L-T), and inclined at 45o to the extrusion direction was investigated. Results indicate that the crack propagation direction is parallel to the extrusion direction for T-L and L-T specimens, whereas the specimen inclined at 45o has an angular deflection of 9° to 11° toward the extrusion direction. The T-L specimen has the fastest fatigue crack propagation rate, and the L-T direction has the slowest rate. The fatigue crack propagation rate of the specimen inclined at 45o is between those of the T-L and L-T specimens. The crack tip propagates by both transgranular and intergranular fractures. Fatigue fracture consists of quasi-cleavage and is a brittle type of fracture.
AZ31B magnesium alloy fatigue crack propagation rate brittle fracture
Zhang Hong-xia Wang Wen-xian Liang Pei-yang Wei Ying-hui
College of Material Science and Engineering of Taiyuan University of Technology, Taiyuan, 030024
国内会议
长沙
英文
1-6
2010-06-19（万方平台首次上网日期，不代表论文的发表时间）