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Influence of Strain State on the Kinetics of Martensitic Transformation Induced Plasticity (TRIP) in AISI 304 Stainless Steel
Author(s) -
Mansourinejad Mostafa,
Ketabchi Mostafa
Publication year - 2018
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201700359
Subject(s) - materials science , martensite , diffusionless transformation , volume fraction , ferrite (magnet) , plasticity , strain (injury) , metallurgy , trip steel , kinetics , plane stress , composite material , thermodynamics , microstructure , finite element method , medicine , physics , quantum mechanics
The influence of strain state on the kinetics of martensitic phase transformation in stainless steel 304 is investigated. The methodology involves stretching various specimens with different widths over a hemispherical punch. The specimens are stretched to various depths by controlling the punch traveling in order to achieve different strain levels. The volume fraction of strain induced martensite is then measured using ferrite scope and plotted versus strain for different strain states. The results show that the martensitic transformation curve has the lowest value for plane strain condition among strain states used for determination of forming limit diagram. There are a close proximity between the two sets of the experimental data and those of the modified Olson‐Cohen and Santacreu's models.