Determination of critical parameters for dynamic recrystallization in Ti-6Al-2Zr-1Mo-1V alloy

The true stress-strain curves of Ti-6Al-2Zr-1Mo-1V alloy were achieved by a series of isothermal compression tests with height reduction of 60% under the deformation temperatures of 1073-1323 K and the strain rates of 0.01-10s 1.The critical conditions for the onset of DRX were attained when the val...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2012-12, Vol.22 (S3), p.668-672
Main Authors: XIA, Yu-feng, LIU, Ying-ying, MAO, Yuan-ping, QUAN, Guo-zheng, ZHOU, Jie
Format: Article
Language:English
Subjects:
activation
activation energy
alloy
dynamic
dynamic recrystallization
energy
flow
flow stress
hardening
rate
recrystallization
strain
strain hardening rate
stress
Ti-6Al-2Zr-1Mo-1V
Ti–6Al–2Zr–1Mo–1V alloy
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Summary:The true stress-strain curves of Ti-6Al-2Zr-1Mo-1V alloy were achieved by a series of isothermal compression tests with height reduction of 60% under the deformation temperatures of 1073-1323 K and the strain rates of 0.01-10s 1.The critical conditions for the onset of DRX were attained when the value of d /d,where strain hardening rate d /d,reached the minimum which corresponds to an inflection of θ versus σ curve.Thus,two important potential parameters,critical strain and critical stress,were identified,and expressed as εc/εp=0.37-0.60,σc/σp=0.81-0.91.Furthermore,by the regression analysis for conventional hyperbolic sine equation,the main material parameters such as α,β,n,and DRX activation energy,Q,were calculated.In addition,the evolution of Q with strain rate and temperature was revealed as a 3D response surface.
ISSN:1003-6326
DOI:10.1016/S1003-6326(12)61783-X