Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012091 | Transactions of Nonferrous Metals Society of China | 2017 | 12 Pages |
Abstract
Dominant phase during hot deformation in the two-phase region of Zr-2.5Nb-0.5Cu (ZNC) alloy was studied using activation energy calculation of individual phases. Thermo-mechanical compression tests were performed on a two-phase ZNC alloy in the temperature range of 700-925 °C and strain rate range of 10â2-10 sâ1. Flow stress data of the single phase were extrapolated in the two-phase range to calculate flow stress data of individual phases. Activation energies of individual phases were then calculated using calculated flow stress data in the two-phase range. Comparison of activation energies revealed that α phase is the dominant phase (deformation controlling phase) in the two-phase range. Constitutive equations were also developed on the basis of the deformation temperature range (or according to phases present) using a sine-hyperbolic type constitutive equation. The statistical analysis revealed that the constitutive equation developed for a particular phase showed good agreement with the experimental results in terms of correlation coefficient (R) and average absolute relative error (AARE).
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
K.K. SAXENA, S.K. JHA, V. PANCHOLI, G.P. CHAUDHARI, D. SRIVASTAVA, G.K. DEY, N. SAIBABA,