Journal
INTERMETALLICS
Volume 19, Issue 10, Pages 1567-1572Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2011.05.031
Keywords
Intermetallics; Twinning; Martensitic structure; ab-initio calculations; Phase stability
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Funding
- Czech Science Foundation [P108/10/P412]
- Ministry of Education, Youth and Sports of the Czech Republic [2E08017]
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Although experimental observations determine the martensite structure of NiTi as monoclinic (B19'), ab-initio calculations show that, after a full optimization of the lattice, the ideal martensite structure relaxes into orthorhombic B33 one. This paper presents a first principles investigation of the structure of (100) compound twins in martensite. The results obtained by means of two different computational codes show that the optimized structure of twin cells is very close to that of B19' martensite. This indicates that twinning can significantly contribute to mechanisms stabilizing the B19' structure in real martensite samples. (C) 2011 Elsevier Ltd. All rights reserved.
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