微量Sc、Zr对Al-Mg-Mn合金敏化腐蚀行为的影响
Effect of Trace Sc and Zr on Sensitized Corrosion Behavior of Al-Mg-Mn Alloy
陈晓明 1黄宏锋 1刘崇宇 1韦莉莉 1朱家豪 1田晔 1范俊2
作者信息
- 1. 桂林理工大学材料科学与工程学院,桂林 541004
- 2. 云南铝业股份有限公司阳宗海铝电解分公司,玉溪 652501
- 折叠
摘要
在Al-5.5Mg-0.3Mn合金基础上,复合添加微量Sc和Zr元素制备Al-5.5Mg-0.3Mn-0.2Sc-0.1Zr合金,通过晶间腐蚀试验、应力腐蚀试验并结合OM,SEM和EBSD显微组织分析,对比研究微量Sc、Zr对Al-Mg-Mn合金敏化腐蚀行为的影响.结果表明,Sc、Zr的添加能细化Al-Mg-Mn合金晶粒尺寸,抑制再结晶,提高合金板材基体中小角度晶界比例和位错密度,优化合金的晶界结构,改善了合金在敏化热处理过程中β相的析出与分布,有效降低合金晶间腐蚀和应力腐蚀敏感性.
Abstract
Al-5.5Mg-0.3Mn-0.2Sc-0.1Zr alloy was prepared by adding trace Sc and Zr to Al-5.5Mg-0.3Mn alloy,and effects of Sc and Zr on sensitized corrosion behavior of Al-Mg-Mn alloys were investigated by intergranular corro-sion as well as stress corrosion combined with OM,SEM and EBSD microscopic observation.The results indicate that the grain size of Al-Mg-Mn alloy is refined,and recrystallization can be inhibited by Sc and Zr,increasing the dis-location density and the proportion of low angle grain boundary of the sheet.The grain boundary is optimized,and the precipitation and distribution of β phase during sensitized heat treatment process are improved,thus reducing the sensi-tivity of intergranular corrosion and stress corrosion.
关键词
Al-Mg合金/微合金化/敏化热处理/β相/耐腐蚀性能Key words
Al-Mg Alloy/Micro-alloying/Sensitized Heat Treatment/β Phase/Corrosion Resistance引用本文复制引用
基金项目
桂林理工大学博士科研启动基金资助项目(GLUTQD2016011)
桂林理工大学博士科研启动基金资助项目(GLUTQD2016012)
出版年
2024
NETL
NSTL
万方数据