The Effect of Pressure on Martensitic Phase Transformations

Abstract:

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Stability of the crystal structure is determined by the competition between attractive and repulsive interatomic forces. Using many-body exponential potentials it can be shown that the bcc structure corresponding to austenitic phases is more stable for low values of the q-parameter characterising the attractive forces for a fixed value of the p-parameter describing the repulsive forces. The structural stability can be changed with the acting pressure that may alter the martensitic transformations from the bcc-austenite to a close-packed structure. The effect of pressure is examined in a generic model employing many-body potentials and the results are compared with ab initio calculations for zirconium representing a monoatomic material with displacive phase transformation.

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Periodical:

Edited by:

Pietro Vincenzini, Stefano Besseghini, Shuichi Miyazaki, Eckhard Quandt and Minoru Taya

Pages:

13-18

DOI:

10.4028/www.scientific.net/AST.78.13

Citation:

V. Paidar et al., "The Effect of Pressure on Martensitic Phase Transformations", Advances in Science and Technology, Vol. 78, pp. 13-18, 2013

Online since:

September 2012

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$35.00

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