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.
Investigation made by authors into Electron–Backscatter–Diffraction (EBSD) technique and its application in dynamic deformation in Fe–Cr–Ni single crystal, 304 stainless steel and nanocopper is critical reviewed. The results are the following: (1) recrystallization occurring in the shear bands induced during high–strain rates is further clarified; (2) both either static/ dynamic recrystallization is firstly recognized in the shear bands, and this leads to an in–depth understanding of recrystallization mechanism;(3) a grain–boundary rotation model for recrystallization is proposed, and by which the calculation is in good agreement with experimental observation.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%