7000系高强铝合金微观组织结构对应力腐蚀行为和机制影响的研究进展  

Research Progress on the Influence of Microstructure on Stress Corrosion Behavior and Mechanisms of 7000 Series High-Strength Aluminum Alloys

作　　者：杨阳[1] 李松梅[1] 贾雪娇 刘建华[1] 于美[1] YANG Yang;LI Songmei;JIA Xuejiao;LIU Jianhua;YU Mei(School of Materials Science and Engineering,BEIHANG University,Beijing 100191,China)

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《材料保护》2024年第7期165-180,213,共17页Materials Protection

摘　　要：7000系(Al-Zn-Mg-Cu)高强铝合金是铝合金中强度最高的系列之一,应力腐蚀开裂(SCC)是影响其服役安全稳定性的关键因素。综述了应力腐蚀开裂的阳极溶解机制和氢致开裂(HIC)机制,总结了7000系铝合金中的组织结构对合金SCC行为及机制的影响;从合金化学成分、热处理、预应变、表面处理等方面对SCC敏感性的影响出发,论述了不同组织结构对SCC行为的影响。提出了降低7000系高强铝合金SCC敏感性的重点研究方向:通过优化合金元素、使用新型的热处理工艺和表面处理技术等方法合理调控合金的微观组织结构,进而延长合金的使用寿命,使材料受到更好地保护。The 7000 series(Al-Zn-Mg-Cu)high-strength aluminum alloy is one of the highest strength aluminum alloy series.Stress corrosion cracking(SCC)is a key factor affecting its service safety and stability.In this paper,the anodic dissolution mechanism and hydrogen-induced cracking(HIC)mechanism of SCC were reviewed,and the effects of microstructure on SCC behavior and mechanism of the 7000 series alumi-num alloy were summarized.Based on the effects of chemical composition of the alloy,heat treatment,pre-strain and surface treatment on SCC sensitivity,the effects of different microstructures on SCC behavior were discussed.The key research directions to reduce the SCC sensitivity of the 7000 series high-strength aluminum alloy were put forward:the microstructure of the alloy is reasonably regulated by optimizing the alloying elements,using new heat treatment processes and surface treatment technologies,to improve the service life of the alloy and better protect the aluminum material.

关 键 词：7000系高强铝合金 组织结构 应力腐蚀开裂 阳极溶解 氢致开裂 研究进展 

分 类 号：TG146.2[一般工业技术—材料科学与工程]