摘要
通过半连续铸造向7055铝合金中添加0.2wt.%Mn元素,并采用XRD、SEM、HRTEM和室温拉伸的实验方法开展Mn元素在7055铝合金铸造、均匀化、锻造、固溶时效过程中的微观分布研究。结果表明,Mn元素在铸造及均匀化7055铝合金中主要以MgZn_(2)型的AlZnMgCuMn五元第二相形式存在;Mn元素在锻造及固溶时效7055铝合金中主要以破碎Al_(6)Mn析出相、S-(Al_(2)CuMg)型的破碎第二相形式存在,时效过程中Al_(6)Mn析出相的晶体学结构始终未变;Mn元素主要通过弥散强化提升7055铝合金强度。
0.2wt.%Mn was added to 7055 aluminum alloy by semicontinuous casting,and the microscopic distribution of Mn element in the process of casting,homogenization,forging and solution aging of 7055 aluminum alloy was studied by XRD,SEM,HRTEM and room temperature tensile tests.The results show that Mn element exists mainly in the form of MgZn 2 type AlZnMgCuMn five-element second phase in the cast and hized 7055 aluminum alloy.In forging and solution aging 7055 aluminum alloy,Mn element exists mainly in the form of broken Al_(6)Mn precipitted phase and S-(Al_(2)CuMg)type crushed second phase,and the crystallography structure of Al 6Mn precipitated phaseremains unchanged during the aging process.Mn element improves the strength of 7055 aluminum alloy mainly through dispersion strengthening.
作者
高文林
王瑞珏
王继成
冯兆东
孙进宝
Gao Wenlin;Wang Ruiyu;Wang Jicheng;Feng Zhaodong;Sun Jinbao(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Engineering Research Center of Advanced Aluminum Alloys and Applications Beijing 100095,China;Advanced Aluminum Alloy Technology Innovation Center,Beijing 100095,China;Hexing Aeronautical Materials(Tianjin)Technology Co.,Ltd.,Tianjin 300300,China)
出处
《轻金属》
2025年第2期36-42,共7页
Light Metals
作者简介
高文林,高级工程师,从事高性能航空铝合金研究。E-mail:13241663121@163.com。
