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Bulk nanocrystalline ω-Zr by high-pressure torsion

AuthorsPérez Prado, María Teresa; Gimazov, A. A.; Ruano, Oscar Antonio; Kassner, M. E.; Zhilyaev, A. P.
High-pressure torsion
Phase transformation
Omega phase
Issue Date2008
CitationScripta Materialia 58 (3) : 219-222 (2008)
AbstractPure nanocrystalline Zr with a grain size of 30 nm and a microhardness of 400 HV has been fabricated by high-pressure torsion (HPT) at room temperature using a pressure of 6 GPa and five revolutions in 5 min. Complete transformation and significant refinement from the initial coarse-grained α-phase to the high-pressure ω-phase occurs during processing. The omega nanocrystalline phase is stable at room temperature and atmospheric pressure. The shear strain applied enhances the transformation kinetics.
Publisher version (URL)http://dx.doi.org/10.1016/j.scriptamat.2007.09.043
Appears in Collections:(CENIM) Artículos
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