Strain-induced structural phase transition of a Ni lattice through dissolving Ta solute atoms
Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 63, Issue: 21
2001
- 7Citations
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Article Description
The structural phase transition of a single-crystal Ni lattice upon dissolving Ta solute atoms is investigated by means of molecular-dynamics simulations with a realistic n-body Ni-Ta potential. It is found that when the solute concentration is within 9–19 at. % of Ta, the accumulated strain results in a martensitic phase transition, i.e., face-centered-cubic (fcc) Ni transforms into a face-centered-orthorhombic-(fco) like structure through shearing, and that when the solute concentration is over 21 at. % of Ta, the Ni lattice collapses and turns into an amorphous state. Comparatively, for the case of an initial hcp Ni lattice, the same martensitic and amorphization transitions also take place. The former hcp-fco transition, however, is mainly through atomic rearrangement as well as readjustment of lattice parameters, and the resultant state is almost perfect single crystal with no shearing bands. Besides, the above structural transitions are frequently in association with a dramatic softening in shear elastic moduli. © 2001 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0034896841&origin=inward; http://dx.doi.org/10.1103/physrevb.63.212102; https://link.aps.org/doi/10.1103/PhysRevB.63.212102; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.63.212102/fulltext; http://link.aps.org/article/10.1103/PhysRevB.63.212102
American Physical Society (APS)
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