温轧态２２１４铝合金在超塑性变形过程中，由于动态回复和动态再结晶的作用，使晶内位错密度在一定程度上保持平衡．超塑性变形的主要机制为晶界滑动；晶内位错滑移和扩散蠕变作为重要的协调机制，促进了晶界滑动的顺利进行．该合金的超塑性变形机制符合位错协调晶界滑动模型．
During the superplastic deformation of warm-rolled aluminium alloy 2214,the dislocation density in the grain remains equilibration to some extent because of the effect of dynamic recovery and recrystallization. The dominant deformation mechanism is grain-boundary sliding.The dislocation sliding in grain and diffusion creep, as two kinds of important coordination mechanism,promote the development of grain-boundary sliding.The superplastic deformation mechanism accords with the model of dislocation coordinating grain-boundary sliding.
参考文献
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| [4] | LiuQ,YaoM．ScrMetatll,1995 |
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