Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1449138 | Acta Materialia | 2009 | 8 Pages |
Abstract
Deformation twins are often observed to meet each other to form multi-fold twins in nanostructured face-centered cubic (fcc) metals. Here we propose two types of mechanism for the nucleation and growth of four different single and multiple twins. These mechanisms provide continuous generation of twinning partials for the growth of the twins after nucleation. A relatively high stress or high strain rate is needed to activate these mechanisms, making them more prevalent in nanocrystalline materials than in their coarse-grained counterparts. Experimental observations that support the proposed mechanisms are presented.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Y.T. Zhu, J. Narayan, J.P. Hirth, S. Mahajan, X.L. Wu, X.Z. Liao,