Evolution of microstructures and homogeneity in superplastic deformation

被引：2
作者：
Bai, BZ [1 ]
Padmanabhan, KA [1 ]
机构：
[1] INDIAN INST TECHNOL, DEPT MET ENGN, MET FORMING LAB, MAT TESTING FACIL, MADRAS 600036, TAMIL NADU, INDIA
来源：
SUPERPLASTICITY IN ADVANCED MATERIALS - ICSAM-97 | 1997年 / 243-2卷
关键词：
superplastic flow; microstructural evolution; non-random phase distribution; coarse grained material equiaxed grains; Zener-Hollomon parameter; equilibrium grain size; grain refinement; grain coarsening;
D O I：
10.4028/www.scientific.net/MSF.243-245.191
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Superplastic deformation of materials having coarse, non-equiaxed and/or non-randomly distributed phases causes microstructural evolution involving grain refinement, transformation to an equiaxed grain shape and/or randomization of phase distribution. It is suggested that the ''equilibrium'' grain size that will evolve following superplastic now is determined mainly by the Zener-Hollomon parameter, Z (= epsilon exp (Q/RT); epsilon is the strain rate, T is the absolute temperature of deformation, Q is the activation energy for flow and R is the gas constant). Experimental support for this view is provided.
引用
收藏
页码：191 / 196
页数：6
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