Abstract
The correlations of the work-hardening exponent,n, with quenching temperature, martensite volume-fraction (MVF) and solute concentration in ferrite are discussed and derived for dual-phase steel. The flow stress of dual-phase steel at low strain is suggested to be expressed by the combination of the terms due to plastic deformation in ferrite and elastic deformation of martensite. Previous experimental results are compared with the behaviour suggested by this theoretical work. In addition, an expression for the work hardening exponents at moderate strains and at the onset of necking are also theoretically suggested.
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Wan, C.M., Yie, S.N., Jahn, M.T. et al. Studies on the stress-strain relations of dual-phase steels. J Mater Sci 16, 2682–2688 (1981). https://doi.org/10.1007/BF00552950
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DOI: https://doi.org/10.1007/BF00552950