Deformation mechanism maps for micro-grained, ultrafine-grained, and nano-grained materials

被引：30

作者：

Mohamed, Farghalli A. ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 03期

基金：

美国国家科学基金会;

关键词：

Coble creep; Deformation map; High-strain rate superplasticity; Micrograin superplasticity; Nanocrystalline materials; Triple-junction creep; SOLID-SOLUTION ALLOYS; STEADY-STATE CREEP; NANOCRYSTALLINE MATERIALS; SUPERPLASTIC FLOW; NANOSTRUCTURED MATERIALS; DISLOCATION CLIMB; BEHAVIOR; DIFFUSION; SIZE; METALS;

D O I：

10.1016/j.msea.2010.10.048

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

There are several deformation mechanisms that depend on grain size and are controlled by grain boundary diffusion. These mechanisms include: Coble creep, superplastic flow (micrograin superplastic flow and high-strain rate superplastic flow), and nanograin deformation. By combining the rate-controlling equations of these mechanisms and by making assumptions regarding triple-junction creep, a deformation map based on grain size was constructed. It is demonstrated that this map can account for the locations of experimental data representing three types of deformation behavior: micrograin superplasticity, high-strain rate superplasticity, and nanograin deformation. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1431 / 1435

页数：5

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