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  4. 孔洞对铸造铝合金疲劳性能的影响

材料工程, 2010, (7): 92-96. doi: 10.3969/j.issn.1001-4381.2010.07.020

孔洞对铸造铝合金疲劳性能的影响

莫德锋 1, , 何国求 2, , 胡正飞 3, , 张卫华 4,

1.同济大学,材料科学与工程学院,上海,200092

2.同济大学,材料科学与工程学院,上海,200092

3.同济大学,材料科学与工程学院,上海,200092

4.西南交通大学,牵引动力国家重点实验室,成都,610031

基金项目:   国家自然科学基金资助项目(50771073)   国家973重点基础研究发展规划资助项目(2007CB714705)  

关键词： 孔洞 , 铸造铝合金 , 疲劳 , 寿命模型

Effect of Porosity on Fatigue Property in Aluminum Cast Alloys

研究了铸造铝合金中孔洞在裂纹萌生、扩展过程中发挥的作用,孔洞的尺寸、体积分数、分布位置、形貌率等因素对材料的疲劳性能有重要影响.从试验现象和疲劳寿命模型两个方面综述了国内外学者研究的最新进展,指出了应力-寿命模型与线弹性断裂模型之间的内在联系,并讨论了存在的问题及研究方向.

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