摘要
研究了退火、淬火状态下 Al-Mg 合金的晶界内耗。实验表明,随 Mg 含量的增加,晶界内耗峰的峰宽和弛豫强度单调下降,峰位开始移向高温,后又移向低温;高温淬火处理能压低 Al-2.4wt-%Mg的晶界峰,但对其它低 Mg 含量试样不敏感,一定温度的保温能使压低的晶界峰回升。
The grain boundary internal friction of a series of Al-Mg alloys afterannealing,quenching has been investigated.Experimental results show that,with increasingof Mg content,the width and relaxation strength of grain boundary internal friction peak de-crease monotonously,the peak position shifts to high temperatures at low Mg content andthen moves back to low temperature;quenching from high-temperature can suppress the grainboundary peak of Al-2.4wt-%Mg alloys but not other alloys with small Mg content.This sup-pressed peak will recover after annealing at an elevated temperature.These phenomena havebeen discussed from three aspects in this paper.
基金
国家自然科学基金
1880748
关键词
热处理
晶界
AL-MG
合金
内耗峰
grain boundary internal friction peak
quenching
annealing
Al-Mg alloy
grain boundary segregation
