The kinetics of pressure-induced alpha-omega transformation in Ti

Singh, AK and Mohan, M and Divakar, C (1982) The kinetics of pressure-induced alpha-omega transformation in Ti. Journal of Applied Physics, 53 . pp. 1221-1223. ISSN 0021-8979

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The kinetics of the high-pressure transformation of the alpha (hcp) phase of titanium to the hexagonal omega phase is measured as a function of pressure with a view towards predicting the kinetics under very high pressures. Changes in electrical resistance were used to monitor the extent of the alpha-omega transformation as a function of time at specimen pressures between 6 and 9 GPa. The time dependence of the fractional omega phase concentration is found to obey an exponential law characteristic of a nucleation and growth process. The pressure dependence of the transformation rate implies that the transformation should occur under shock loading conditions at a pressure of 19 GPa, in contrast to experimentally observed values of 35 GPa.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics
Uncontrolled Keywords: Close packed lattices;Hexagonal cells;Phase transformations; Pressure effects;Reaction kinetics;Titanium;Electrical resistance;High pressure; Monitors;Nucleation;Shock loads; Time dependence
Subjects: CHEMISTRY AND MATERIALS > Metals and Metallic Materials
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Ms. Alphones Mary
Date Deposited: 17 Nov 2005
Last Modified: 24 May 2010 09:39

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