Research on Constitutive Model of TRIP600 Based on Rheological Theory

doi:10.3901/JME.2016.10.075

Abstract

Abstract: Transformation induced plasticity(TRIP) steels are prone to crack during forming process, mainly because of the transformation of retained austenite to martensite, causing discordance between external force and deformation. The mechanical behavior of TRIP steels has conventional elastic and plastic deformation, as well as time-dependent viscous properties. So it is necessary to consider the effect of time to their deformation behavior during constitutive model building. The rheological model can be used in TRIP steels not only to reveal the soft and hard phase properties accurately and reasonably by combination of different components but also to indicate the TRIP effect during deformation process by change and combination of coefficients of components. Rheological constitutive models for TRIP600 are researched and discussed based on rheological theory, and finally the uniform constitutive equations under creep and stress relaxation condition are built.

Key words: constitutive equation, creep, elastic-viscoplastic, relaxation, rheology, TRIP effect

CLC Number:

TG113

SUN Jiquan, YIN Yanjun, NIU Chuang, TENG Shengyang. Research on Constitutive Model of TRIP600 Based on Rheological Theory[J]. Journal of Mechanical Engineering, 2016, 52(10): 75-83.

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