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Effect of pre-strain on creep behaviour and constitutive modelling of titanium alloy sheets

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Published under licence by IOP Publishing Ltd
, , Citation Yuan Chen et al 2018 J. Phys.: Conf. Ser. 1063 012121 DOI 10.1088/1742-6596/1063/1/012121

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lishuhui@sjtu.edu.cn

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1 State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China

2 Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240, China

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1742-6596/1063/1/012121

Abstract

This paper discusses the effect of pre-strain on the creep behaviour and constitutive modelling of titanium alloy Ti-3Al-5Mo-5V-8Cr sheets. A set of uniaxial tensile creep tests at different pre-strains and different stresses were carried out to analyse the creep behaviour of titanium alloy sheets. The results show that pre-strains have significant influence on the creep behaviour which was opposite to the effect of stress. And based on the experiment results, a modified Garofalo creep constitutive model was established which can illustrate the creep aging behaviour of titanium alloy Ti-3Al-5Mo-5V-8Cr sheet at 500°C under different stresses and different pre-strains very well.

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10.1088/1742-6596/1063/1/012121