Grain boundary distribution and texture in ultrafine-grained copper produced by severe plastic deformation

被引：128
|
作者：
Mishin, OV
Gertsman, VY
Valiev, RZ
Gottstein, G
机构：
[1] RUSSIAN ACAD SCI, INST MET SUPERPLAST, UFA 450001, RUSSIA
[2] UNIV MANITOBA, DEPT MECH & IND ENGN, MET SCI LABS, WINNIPEG, MB R3T 5V6, CANADA
来源：
SCRIPTA MATERIALIA | 1996年 / 35卷 / 07期
关键词：
D O I：
10.1016/1359-6462(96)00222-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Microstructure, micro-and macrotexture and grain boundary distributions, which had been generated by severe plastic deformation (using the equi-channel angular technique) were studied. Grain refinement from 23 to 0.21 m accompanied by drastic changes of texture and GB distribution occurred during deformation. More than 90% of grain boundaries were found to be high-angle boundaries. The fractions of low-angle and twin boundaries were considerably lower than in the original state of the material. Generally, the GB distribution tended towards a random misorientation distribution. The formation of this type of microstructure can be explained by the concurrent action of dynamic recovery and a rotational mode of severe plastic deformation.
引用
收藏
页码：873 / 878
页数：6
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