7A04铝合金球铰失效分析  

Failure analysis of 7A04 aluminum alloy spherical hinge

作　　者：何振波 杨曼 王生朝[1] 郭奉彬 牌君君 欧玲[1] 梁乘鹏 蹇海根[1,5] HE Zhenbo;YANG Man∗;WANG Shengzhao;GUO Fengbin;PAI Junjun;OU Ling;LIANG Chengpeng;JIAN Haigen(College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou 412007,China;Hangqiao New Material(Binzhou)Science Technology Ltd.,Binzhou 256600,China;Shandong Key Laboratory of Advanced Aluminum Materials and Technology,Binzhou 262207,China;Shandong Advanced Aluminum Community Management and Operation Co.,Ltd.,Binzhou 256600,China;OKE CNC Precision Tool Co.,Ltd.,Zhuzhou 412500,China)

机构地区：[1]湖南工业大学材料与先进制造学院,湖南株洲412007 [2]航桥新材料科技(滨州)有限公司,山东滨州256600 [3]山东省先进铝基材料与技术重点实验室,山东滨州262207 [4]山东省高端铝共同体管理运营有限公司,山东滨州256600 [5]欧科亿数控精密刀具股份有限公司,湖南株洲412500

出　　处：《轻合金加工技术》2023年第10期49-52,共4页Light Alloy Fabrication Technology

基　　金：山东省泰山产业领军人才项目;山东省高端铝共同体高层次人才强企项目;湖南省自然科学基金(2023JJ50174/2023JJ50181);教育部产学合作协同育人项目(220506429021607);湖南工业大学大学生创新创业训练计划项目(2023176)。

摘　　要：7A04铝合金球铰在疲劳试验过程中发生断裂失效。通过对失效件断口的宏微观形貌观察、能谱分析以及有限元模拟计算等,分析了7A04铝合金球铰疲劳裂纹形成原因及其失效机制。结果表明,疲劳裂纹萌生于气孔、氧化夹杂物等冶金缺陷位置,并在后续起桥接连通作用进一步加速裂纹扩展,造成试件断裂失效。The fracture failure of 7A04 aluminum alloy spherical hinge occurred during the fatigue test.Through the macro and micro morphology observation,energy spectrum analysis and finite element simulation calculation of the fracture of the failure part,the causes of fa⁃tigue crack formation and failure mechanism of the spherical hinge were analyzed.The re⁃sults show that the fatigue crack initiates at the location of metallurgical defects such as pores and oxide inclusions,and further accelerates the crack propagation in the subsequent bridg⁃ing connection,resulting in fracture failure of the specimen.

关 键 词：7A04铝合金 球铰 疲劳断裂 微观形貌 

分 类 号：TG166.3[金属学及工艺—热处理]