volume 86, issue 10, P1151-1160 2015
DOI: 10.1002/srin.201400585
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Abstract: The impact toughness of 0.2% C-1.5% Si-(1.5-5.0)% Mn (mass%) transformationinduced plasticity (TRIP)-aided steels with bainitic ferrite and/or martensite structure matrices produced by isothermal transformation process is investigated for automotive body applications. The highest impact toughness, highest Charpy impact absorbed value (CIAV) at 298 K (130 J cm À2 ), and lowest ductile-brittle transformation temperature (DBTT, 203 K) is achieved in 1.5% Mn steel subjected to an isothermal transformation process…

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