精品文档---下载后可任意编辑AZ31 镁合金焊接接头疲劳性能及改善方法讨论的开题报告Title：A Study on Fatigue Performance and Improvement Methods of Welded Joints of AZ31 Magnesium AlloyAbstract：AZ31 magnesium alloy has been increasingly used in various industries because of its excellent properties such as high strength-to-weight ratio, high damping capacity, and good machinability. However, weldability is one of the biggest challenges in the application of magnesium alloy. The fatigue performance of welded joints is particularly important for components subjected to cyclic loading, such as those in the aerospace, automotive, and biomedical industries. This study aims to investigate the fatigue performance and improvement methods of welded joints of AZ31 magnesium alloy. The effects of welding parameters, post-weld treatment, and surface treatment on the fatigue behavior of the welded joints will be studied. The goal of this research is to establish an effective method to improve the fatigue performance of welded joints of AZ31 magnesium alloy.Keywords: AZ31 magnesium alloy, welded joint, fatigue performance, improvement methods, welding parameters, post-weld treatment, surface treatment.Introduction：Magnesium alloys are attracting increasing attention for lightweight applications due to their high specific strength and stiffness, excellent fatigue resistance, and good castability. Among various magnesium alloys, AZ31 is one of the most commonly used alloys in various industries such as aerospace, automotive, and biomedical industries due to its good mechanical properties, corrosion resistance, and excellent machinability. However, the weak weldability of magnesium alloys has limited their application. The major challenges in welding magnesi...
