期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 48, 期 -, 页码 72-91出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2013.02.006
关键词
Crystal plasticity; Layered composites; Rolling textures; Interface stability; Finite elements
资金
- Los Alamos National Laboratory Directed Research and Development (LDRD) Project [DR20110029]
- DOE [DE AC52 06NA25396]
It has recently been shown that a highly oriented microstructure develops during severe plastic rolling deformation of Cu/Nb (fcc/bcc) nanocomposites. The deformation textures significantly deviate from those expected when rolling Cu or Nb alone, and the Cu/Nb interfaces do not correspond to those with the lowest possible formation energies. Motivated by these experimental observations, we study the heterophase interface character (HIC) stability of specific Cu/Nb bicrystal configurations under rolling conditions using a finite element crystal plasticity model. In this work, the HIC stability refers to the stability of the 5-parameter character of the interface (the orientation relationship and the interface plane) under mechanical load. Specifically, we examine how slip activity and lattice reorientation are affected by the kinematic constraint imposed by the interface. Our results show that bicrystal stability is governed by the least stable crystal. (C) 2013 Elsevier Ltd. All rights reserved.
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