晶粒间界局域无序化引起的滞弹性弛豫  

ANELASTIC RELAXATIONS ASSOCIATED WITH LOCAL DISORDERING IN GRAIN BOUNDARIES

作　　者：程波林[1] 葛庭燧[1] 

机构地区：[1]中国科学院固体物理研究所内耗与固体缺陷开放研究实验室

出　　处：《金属学报》1990年第5期A317-A322,共6页Acta Metallurgica Sinica

摘　　要：研究了高纯铝竹节晶界的弛豫行为。首次发现竹节晶界的弛豫强度与温度密切相关,它随着温度降低而显著减小,在约0.4Tm(Tm是熔点绝对温度)处变为零。这反映晶界结构在中温处出现局域无序化。本文结果与晶界发生局域无序现象的原子模拟图象一致。Internal friction and micro-creep measurements were performed withhigh-purity Al bamboo-crystal specimens. The relaxation strength was found to de-crease with the decrease of the temperature of measurement and became zero at about0.4T_m (T_m being melting temperature). This reflects the occurrence of local disorder-ing in the bamboo boundary region at this temperature. This result conformsto the picture of grain boundary disordering constructed by atomic simulationstudies.

关 键 词：金属 滞弹性 弛豫 晶粒 无序 界面 

分 类 号：TG111.7[金属学及工艺—物理冶金]