Paper Title:
Effect of Micro-Elasticity on Grain Growth and Texture Evolution: A Phase Field Study
  Abstract

In this presentation, a novel phase field grain growth model combined with a micro-elasticity effect including elastic anisotropy and inhomogeity is presented to demonstrate the effect of micro-elasticity on grain growth and texture evolution. We report on texture evolution and abnormal grain growth induced by external elastic load from the viewpoint of micro-elasticity and first demonstrate that the previous mechanism (macroscopic viewpoint) on the effect of external elastic load on grain growth does not work in strain-controlled system. In contrast to the macro-elastic descriptions, strong localization of strain energy density and inhomogeneous distribution even inside grains are observed. Moreover, elastically soft grains with a higher strain energy density grow at the expense of the elastically hard grains to reduce the total strain energy. It is observed that strong <100>//ND fiber texture was developed in poly-crystalline Cu with initial random texture by biaxial external strain while <111>//ND fiber texture evolved in biaxial external stress condition. Even, grain growth of <100>//ND textured grains is occurred as abnormal grain growth when <100>//ND textured grains are surrounded by <111>//ND fiber textured grains.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1590-1593
DOI
10.4028/www.scientific.net/MSF.654-656.1590
Citation
D. U. Kim, S. G. Kim, W. T. Kim, J. H. Cho, H. N. Han, P. R. Cha, "Effect of Micro-Elasticity on Grain Growth and Texture Evolution: A Phase Field Study", Materials Science Forum, Vols. 654-656, pp. 1590-1593, 2010
Online since
June 2010
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