An investigation of grain boundaries in submicrometer-grained Al-Mg solid solution alloys using high-resolution electron microscopy

被引:319
作者
Horita, Z
Smith, DJ
Furukawa, M
Nemoto, M
Valiev, RZ
Langdon, TG
机构
[1] ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287
[2] ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287
[3] FUKUOKA UNIV EDUC,DEPT TECHNOL,FUKUOKA 81141,JAPAN
[4] RUSSIAN ACAD SCI,INST MET SUPERPLAST PROBLEMS,UFA 450001,RUSSIA
[5] UNIV SO CALIF,DEPT MAT SCI,LOS ANGELES,CA 90089
[6] UNIV SO CALIF,DEPT MECH ENGN,LOS ANGELES,CA 90089
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1996.0239
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
High-resolution electron microscopy was used to examine the structural features of grain boundaries in Al-1.5% Mg and Al-3% Mg solid solution alloys produced with submicrometer grain sizes using an intense plastic straining technique, The grain boundaries were mostly curved or wavy along their length, and some portions were corrugated with regular or irregular arrangements of facets and steps, During exposure to high-energy electrons, grain boundary migration occurred to reduce the number of facets and thus to reduce the total boundary energy. The observed features demonstrate conclusively that the grain boundaries in these submicrometer-grained materials are in a high-energy nonequilibrium configuration.
引用
收藏
页码:1880 / 1890
页数:11
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