考虑缺陷影响的YL113铝合金疲劳寿命研究  

Study on Fatigue Life of YL113 Aluminum Alloy Considering Influence of Defects

作　　者：吕浩 LYU Hao(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2025年第2期74-78,共5页Machine Building & Automation

摘　　要：通过开展YL113铝合金的应力疲劳试验,研究材料内部微观孔洞对材料疲劳寿命的影响。结果表明:微观孔洞在材料的疲劳寿命上具有显著影响。由于存在孔洞缺陷,材料的疲劳寿命呈现出较大的分散性。除了缺陷尺寸的限制之外,缺陷的位置也对材料的疲劳性能产生影响,甚至位置的影响优于缺陷尺寸。通过对试件断口的分析,确定了缺陷尺寸并建立应力–缺陷–寿命的关系模型,其可用于评估含有微孔缺陷的YL113铝合金材料的疲劳寿命。This study,based on the stress fatigue tests on YL113 aluminum alloy,investigates the impact of internal microscopic pores on the material's fatigue life.The results indicate that the microscopic pores have a significant impact on the material's fatigue life.Due to the existence of void defects,the dispersion of the material's fatigue life is evident.The fatigue life is not only constrained by the size of the defects but also influenced by their location,and the location has more pronounced effect than the defect size.By analyzing the fracture surfaces of the specimens,the defect sizes were determined,and a stress-defect-life relationship model was established,which can be used to assess the fatigue life of YL113 aluminum alloy materials containing microscopic pore defects.

关 键 词：微观孔洞 YL113铝合金 疲劳寿命 

分 类 号：TB302.3[一般工业技术—材料科学与工程]