Journal
METAL SCIENCE AND HEAT TREATMENT
Volume 64, Issue 3-4, Pages 137-145Publisher
SPRINGER
DOI: 10.1007/s11041-022-00774-1
Keywords
low-carbon steels; bainite; martensitic-austenitic component; microstructure; mechanical properties
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This research extends the understanding of the thermal and deformation stability of untransformed austenite in the martensitic-austenitic component of low-carbon steel bainitic structure, through experimental and theoretical studies. The analysis of compressive hydrostatic stresses during dilatation provides the relationships to determine the temperature at which martensitic transformation begins in the MA-component, as well as the level of deformation caused by strain-induced martensitic transformation.
Results of experimental and theoretical studies are used to extend understanding of thermal and deformation stability of untransformed austenite in the martensitic-austenitic (MA) component of low-carbon steel bainitic structure. Analysis of the effect of compressive hydrostatic stresses developing during dilatation on austenite stabilization makes it possible to obtain relationships for determining the temperature of the start of martensitic transformation in the MA-component as a function of its volume fraction in the steel structure in order to find the level of deformation due to strain-induced martensitic transformation.
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