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背散射电子衍射在高应变率变形结构研究中的应用

Keywords: 材料科学基础学科,ebsd,高应变率,亚结构,剪切带,动态再结晶

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Abstract:

?本文是作者对背散射电子衍射技术在高应变率态载荷下诱发的几种晶体(包括fe----cr----ni单晶、304不锈钢和纳米铜)变形结构演化的最新研究结果,以及对相关研究进展的简要评述.具体内容包括:(1)进一步辨认剪切带中再结晶现象,澄清长期来学者们对该问题看法上的分歧;(2)采用meyers等提出的结构演化模型对再结晶予以合理的解释;(3)在实验基础上,根据位错动力学理论,对局部化过程中再结晶的晶粒生长予以定量描述,其结果与实验事实吻合.

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