摘要
简要介绍了镁合金在疲劳加载条件下的循环应力响应行为、疲劳裂纹萌生与扩展行为以及疲劳断裂的微观特征,分析了镁合金的显微组织、冶金和表面状态等材料内在因素以及环境、温度等外部因素对镁合金的疲劳强度、疲劳寿命、疲劳裂纹扩展速率的影响规律,指出了机械抛光、喷丸处理、表面滚压等表面机械加工方法以及适当的热处理均可有效地提高镁合金的疲劳强度和疲劳寿命.此外,也对镁合金疲劳行为的未来研究方向和发展趋势进行了展望.
Cyclic stress response behavior, fatigue crack initiation and propagation behavior and (corresponding) fracture characteristics of magnesium alloys under fatigue loading condition are summarized. The influence of material factors including microstructure, metallurgy, surface status, and external factors like environment and testing temperature on fatigue strength and lifetime as well as fatigue crack growth rate of magnesium alloys has been analyzed. Some measures such as surface mechanical processing (technology) including mechanical polishing, shot pinning and surface rolling strengthening, as well as (appropriate) heat treatment can effectively improve fatigue strength and life of magnesium alloys. In (addition,) further research concerning fatigue behavior of magnesium alloys has been suggested.
出处
《沈阳工业大学学报》
EI
CAS
2005年第3期253-256,265,共5页
Journal of Shenyang University of Technology
关键词
镁合金
疲劳性能
疲劳裂纹萌生
疲劳裂纹扩展
显微组织
magnesium alloy
fatigue property
fatigue crack initiation
fatigue crack propagation
(microstructure)
