Flow stress model considering the transformation-induced plasticity effect and the inelastic strain recovery behavior

Hai-yan Yu, Li Bao

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    Cite this article as:

    Hai-yan Yu, and Li Bao, Flow stress model considering the transformation-induced plasticity effect and the inelastic strain recovery behavior, Int. J. Miner. Metall. Mater., 18(2011), No. 2, pp.185-191. https://dx.doi.org/10.1007/s12613-011-0420-2
    Hai-yan Yu, and Li Bao, Flow stress model considering the transformation-induced plasticity effect and the inelastic strain recovery behavior, Int. J. Miner. Metall. Mater., 18(2011), No. 2, pp.185-191. https://dx.doi.org/10.1007/s12613-011-0420-2
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    Flow stress model considering the transformation-induced plasticity effect and the inelastic strain recovery behavior

    • School of Automotive Engineering, Tongji University, Shanghai, 200092, China

    基金项目: 

    This work was financially supported by the National Natural Science Foundation of China (No.50705067) and the Ph.D. Programs Foundation of the Ministry of Education of China (No.20070247013).

      通信作者:

      Hai-yan Yu E-mail: yuhaiyan@tongji.edu.cn

    中文摘要

    On the basis of continuum mechanics and the Mori-Tanaka mean field theory, a micro-mechanical flow stress model that considered both the transformation-induced plasticity (TRIP) effect and the inelastic strain recovery behavior of TRIP multiphase steels was presented. The relation between the volume fraction of constituent phases and plastic strain was introduced to characterize the transformation-induced plasticity effect of TRIP steels. Loading-unloading-reloading uniaxial tension tests of TRIP600 steel were carried out and the strain recovery behavior after unloading was analyzed. From the experimental data, an empirical elastic modulus expression is extracted to characterize the inelastic strain recovery. A comparison of the predicted flow stress with the experimental data shows a good agreement. The mechanism of the transformation-induced plasticity effect and the inelastic recovery effect acting on the flow stress is also discussed in detail.

     

    Flow stress model considering the transformation-induced plasticity effect and the inelastic strain recovery behavior

    Author Affilications

      • School of Automotive Engineering, Tongji University, Shanghai, 200092, China

    • Funds: 

      This work was financially supported by the National Natural Science Foundation of China (No.50705067) and the Ph.D. Programs Foundation of the Ministry of Education of China (No.20070247013).

    • Received: 18 March 2010; Revised: 01 April 2010; Accepted: 24 April 2010;
    On the basis of continuum mechanics and the Mori-Tanaka mean field theory, a micro-mechanical flow stress model that considered both the transformation-induced plasticity (TRIP) effect and the inelastic strain recovery behavior of TRIP multiphase steels was presented. The relation between the volume fraction of constituent phases and plastic strain was introduced to characterize the transformation-induced plasticity effect of TRIP steels. Loading-unloading-reloading uniaxial tension tests of TRIP600 steel were carried out and the strain recovery behavior after unloading was analyzed. From the experimental data, an empirical elastic modulus expression is extracted to characterize the inelastic strain recovery. A comparison of the predicted flow stress with the experimental data shows a good agreement. The mechanism of the transformation-induced plasticity effect and the inelastic recovery effect acting on the flow stress is also discussed in detail.

     

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