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nial超塑性变形的正电子寿命研究

Keywords: nial,超塑性,正电子寿命,晶界结构

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Abstract:

?研究了b2型多晶nial的晶界结构对缺陷态正电子寿命的影响,并结合正电子谱探讨了热挤压及超塑性变形过程后的晶界结构.热挤压后的nial合金具有完全的再结晶组织,而超塑性变形过程中的动态回复和再结晶是一种不完全再结晶过程,所得到晶界仍属于亚晶界或小角度晶界范畴,再结晶晶界在超塑性变形过程中不发生滑动.

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