低温时效对2091合金组织和性能的影响  

The Effect of Aging at Low Temperature on Microstructure and Properties of a 2091 Alloy

作　　者：刘兴秋[1] 王佐义 运小飞 李仁顺[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《材料科学与工艺》1995年第2期68-72,共5页Materials Science and Technology

摘　　要：本文用透射电镜、示差扫描热分析和Ｉｎｓｔｒｏｎ电子拉伸机研究２０９１合金在低温（８０℃）时效过程中的析出行为、位错组态及机械性能变化。结果表明，合金在低温时效过程中，伴随着ＧＰ区和δ′相的析出以及位错环和蜷线位错的形成，产生了合金低温时效强化效果．合金在８０℃时效１—２ｈ内出现明显的强化现象，随时间延长，强化效果变化不大．The aging behavior, dislocation array and mechanical properties of a 2091 alloy aging at low temperature(80℃)have been studied by using TEM、DSC AND Instron tensile testing machine. The results indicate that during aging the strength of the alloy was improved since the formation of GP zone,the precipitation of δ′phase,the formation of dislocation loops and reelable dislocations in the alloy.The strength was increased obviously after aging for ane to two hours,but it did not increase so much with further aging.

关 键 词：低温时效 GP区 析出相 时效硬化 铝锂合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]