GRAIN SHAPE EFFECT IN SUPERPLASTIC DEFORMATION

被引：0
|
作者：
CUI Jianzhong MA Longxiang Northeast University of Technology
机构：
来源：
Acta Metallurgica Sinica(English Letters) | 1989年 / 07期
关键词：
superplastic deformation; thermomechanical treatment(TMT); grain shape; grain boundary sliding; region transition;
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学科分类号：
摘要：
The method controlling grain shape in TMT processing and the effect of grain shape on char-acteristic parameters in superplastic deformation were discussed.The accommodation velocityof grahl boundary sliding,which is the dominant mechanism in superplastic deformation,andthe contribution of each mechanism to the total strain,as influenced by grain shape,were ana-lyzed.Grain shape has been shown to be an essential structural factor for superplasticity.Thenan analysis was made about the effect of grain shape on the region transition strain rate sothat a new concept,critical aspect for superplasticity,was worked out.These predictions werecompared with the measured results in an Al-Zn-Mg alloy.
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页码：61 / 67
页数：7
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