A Constitutive Equation Coupling the Grain Size during the High Temperature Deformation of Ti-6.62Al-5.14Sn-1.82Zr Alloy

Abstract:

A constitutive equation has been established to describe the effect of grain size on the deformation behavior of Ti-6.62Al-5.14Sn-1.82Zr alloy during the high temperature. In this paper, firstly a steady flow stress model is proposed, and a function relating to the grain size is introduced to modify the steady flow stress model. Meanwhile, a microstructure model established by the fuzzy neural network method is applied to calculate the grain size of prior α phase during the high temperature deformation of Ti-6.62Al-5.14Sn-1.82Zr alloy. The calculated flow stress using the present constitutive equation shows a good agreement with the experimental flow stress of the Ti-6.62Al-5.14Sn-1.82Zr alloy. The relative maximum error was not more than 15%.

• Periodical: Materials Science Forum (Volumes 561-565)
• Pages: 155-158
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.561-565.155
• Online since: October 2007
• Authors: Jiao Luo, Miao Quan Li, Y.Q. Hu
• Keywords: Constitutive Equation, Fuzzy Neural Network (FNN), Grain Size, High Temperature Deformation, TiAl

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