摘要
运用电子背散射衍射技术(EBSD)、显微硬度计及电化学测试,研究了不同时效处理对2024铝合金晶界特征分布、硬度和腐蚀性能的影响,并分析铝合金晶界特征分布与硬度和耐蚀性的相关性.结果表明,随着时效时间的延长,2024铝合金样品中的小角度晶界的比例先逐渐增大,然后逐渐降低;低重位晶界(ΣCSL晶界)比例也是先增加,达到峰值后又呈下降趋势;小角度晶界和低ΣCSL晶界比例高的样品比小角度晶界和低ΣCSL晶界比例低的样品明显具有高硬度和耐腐蚀性.
The effects of aging treatment on grain boundary character distribution and properties of 2024 Al alloy were studied by using electron backscattered diffraction（EBSD）technology,hardness test and the electrochemical test.The relationship between grain boundary character distribution and hardness,intergranular corrosion resistance of 2024 Al alloy was summarized.The results showed that the frequency of low angle boundaries gradually increased after aging treatment at 9 h,and the hardness decreased with the further increase of aging time.With the increase of aging time in the range of 0-15 h,low coincidence site lattice（CSL）grain boundary occur with a relatively high frequency after aging treatment at 12 h.The higher frequency low angle boundaries and low CSL grain boundaryis occur with,the better the hardness and the corrosion-resisting property are.
出处
《沈阳大学学报（自然科学版）》
CAS
2017年第6期435-440,共6页
Journal of Shenyang University：Natural Science
基金
国家自然科学基金资助项目(51171118)
中国博士后基金资助项目(2016M601333)
辽宁省自然科学基金资助项目(201602518)
关键词
2024铝合金
小角度晶界
重位晶界
硬度
耐蚀性
2024 Al alloy
low angle boundaries
coincidence site lattice
the hardness
corrosion-resisting property
