期刊
ACTA MATERIALIA
卷 60, 期 3, 页码 1099-1115出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.10.047
关键词
Texture; Shear bands; Finite element analysis
资金
- National Natural Science Foundation of China [50725102, 51101030]
- Fundamental Research Funds for the Central Universities [N090302001, N090202001]
- Foundation for the Youth Teachers from the Ministry of Education of China [20090042120007]
- Alexander von Humboldt Stiftung (AvH, Alexander von Humboldt Foundation)
We present crystal plasticity finite element simulations of the texture evolution in a-brass polycrystals under plane strain compression. The novelty is a non-crystallographic shear band mechanism [Anand L, Su C. J Mech Phys Solids 2005;53:1362] that is incorporated into the constitutive model in addition to dislocation and twinning. Non-crystallographic deformation associated with shear banding leads to weaker copper and S texture components and to a stronger brass texture compared to simulations enabling slip and twinning only. The lattice rotation rates are reduced when shear banding occurs. This effect leads to a weaker copper component. Also, the initiation of shear banding promotes brass-type components. In summary the occurrence of non-crystallographic deformation through shear bands shifts face-centered-cubic deformation textures from the copper type to the brass type. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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