粉末冶金铝合金的疲劳裂纹扩展行为

The Behavior of Fatigue Crack Propagation of Powder Metallurgy Aluminium Alloys

疲劳性能是粉末冶金铝合金一项重要的使用性能,研究疲劳裂纹扩展行为是研究疲劳性能的一种重要的方法。总结了影响粉末冶金铝合金疲劳裂纹扩展速率的各种外部因素和内部因素,外部因素主要包括应力比、温度、制备方法等,内部因素有晶粒尺寸、夹杂物、铝基复合材料中的增强相颗粒等,并详细阐述了这些因素的影响机制。

The fatigue performance is one of the most important properties of powder metallurgy aluminium alloys.Researching the behavior of fatigue crack propagation is an important way to study fatigue performance.The fatigue crack growth rate is influenced by various factors,including external factors such as stress ratio,temperature,processing methods and internal factors such as grain size,inclusions,reinforced particles.The mechanisms of these factors are represented in details.