Study on High Temperature Deformation Characteristics of BTi-62421S

Hui Fang Zhang; Zhi Min Zhang; Xing Zhang; Bao Cheng Li; Hong Hai Ma

doi:10.4028/www.scientific.net/MSF.704-705.141

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HomeMaterials Science ForumMaterials Science Forum Vols. 704-705Study on High Temperature Deformation...

Study on High Temperature Deformation Characteristics of BTi-62421S

Abstract:

In the paper, the high-temperature compression test of BTi-62421S alloy was carried out in the temperature range from 850°C to 1050°C, strain rate range from 0.01 s^-1 to 30 s^-1, and the deformation of 70%. The results show that the flow stress of BTi-62421S alloy significantly increased with the decreasing of the temperature and the increasing of the strain rate. By calculating the activation energy of deformation and analyzing the stress-strain curve, it can be seen that the softening mechanism of hot deformation of BTi-62421S alloy is different near the （α+β）/β phase transforming temperature. The softening mechanism of hot deformation is mainly dynamic recrystallization in （α+β） area and it is mainly dynamic recovery above β phase transforming temperature. According to hyperbolic sine model, the alloy’s constitutive equation is established. Key word: BTi-62421S alloy; high temperature figuration; constitutive equation

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Materials Science Forum (Volumes 704-705)

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141-146

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https://doi.org/10.4028/www.scientific.net/MSF.704-705.141

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December 2011

Authors:

Hui Fang Zhang, Zhi Min Zhang, Xing Zhang, Bao Cheng Li, Hong Hai Ma

Keywords:

BTi-62421S Alloy, Constitutive Equation, High Temperature Figuration

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