[en] The mechanisms effectively responsible for the enhancement of the work-hardening capabilities of multiphase steels assisted by transformation-induced plasticity are highlighted. Different microstructures, some containing a proportion of retained austenite with various mechanical stabilities, are studied. The dislocation density generated within ferrite by the mechanically induced martensitic transformation of retained austenite is shown to scale with the incremental work-hardening exponent. The acoustic emission generated during tensile straining was also measured. The acoustic emission was revealed to result mainly from dislocation motion, especially from the motion of the additional dislocation density generated in intercritical ferrite by the strain-induced martensitic transformation.
Disciplines :
Materials science & engineering
Author, co-author :
Jacques, Pascal J.; Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés
Furnémont, Quentin; Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés
Mertens, Anne ; Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés
Delannay, Francis; Université Catholique de Louvain - UCL > Département des Sciences des Matériaux et des Procédés
Language :
English
Title :
On the sources of work hardening in multiphase steels assisted by transformation-induced plasticity
Publication date :
2001
Journal title :
Philosophical Magazine. A. Physics of Condensed Matter. Defects and Mechanical Properties
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