铸造2025，Vol.74Issue(12)：1559-1565,7.
铝硅合金缩松、室温屈服强度和拉压疲劳极限的数学关系研究
Research on the Mathematical Relationship Between Shrinkage Porosity,Room-Temperature Yield Strength,and Tensile&Compression Fatigue Limit of Al-Si Alloy
摘要
Abstract
In response to the problems of the high cost of test and the large calculation error for the fatigue limit of aluminum-silicon alloy,a quantitative mathematical relationship between shrinkage porosity,yield strength,and fatigue limit has been established by room temperature tensile tests,room temperature tensile and compression fatigue tests,scanning electron microscopy(SEM),etc in this investigation.The results show that the fatigue fracture of Al-8.5Si-1.2Cu-0.38Mg alloy is composed of fracture source zone,crack propagation zone,and instantaneous fracture zone,and all fracture sources existing shrinkage porosities,which is the main cause of fatigue fracture.The proposed mathematical relationship is validated through experiments,and the results indicate that the prediction error is small.关键词
铝硅合金/缩松/屈服强度/疲劳极限/疲劳裂纹源Key words
aluminum-silicon alloy/shrinkage porosity/yield strength/fatigue limit/fatigue fracture source分类
矿业与冶金引用本文复制引用
毛郭灵,周海涛,杨晨帆,王根全,李耀宗,强慧..铝硅合金缩松、室温屈服强度和拉压疲劳极限的数学关系研究[J].铸造,2025,74(12):1559-1565,7.基金项目
科工局基础产品创新科研项目. （）
