7A85铝合金承载构件断裂原因  

Reasons for fracture of 7A85aluminum alloy bearing component

作　　者：杨晓[1] 王真钟 张先锋[1] 李雪峰[1,2] 张欣耀 高灵清[1,2] YANG Xiao;WANG Zhenzhong;ZHANG Xianfeng;LI Xuefeng;ZHANG Xinyao;GAO Lingqing(Luoyang Ship Material Research Institute,Luoyang 471023,China;Henan Key Laboratory of Technology and Application of Structural Materials for Ships and Marine Equipments,Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,洛阳471023 [2]河南省船舶及海工装备结构材料技术与应用重点实验室,洛阳471023

出　　处：《理化检验（物理分册）》2022年第10期61-63,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某7A85铝合金承载构件在使用一段时间后发生断裂,采用宏观观察、化学成分分析、力学性能测试、金相检验等方法对构件断裂原因进行分析。结果表明:该承载构件开裂位置为销孔处,断裂模式为应力腐蚀,断裂的主要原因是环境与应力的共同作用引起的。A bearing component of A7A85aluminum alloy broke after a period of use.Macroscopic observation,chemical composition analysis,mechanical property test,metallographic inspection and other methods were used to analyze the fracture reasons of the component.The results show that the cracking position of the bearing component was at the pin hole,the fracture mode was stress corrosion,and the main reason for the fracture was the combined action of environment and stress.

关 键 词：铝合金 承载构件 脆性断裂 应力腐蚀 

分 类 号：TG115.5[金属学及工艺—物理冶金]