Martensitic transformation induced by quenching or by plastic deformation
| Autor: | C. Dagbert, Jacques Galland, L. Hyspecka, I. Félix-Henry |
|---|---|
| Přispěvatelé: | Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Dept Mat Engn, Technical University of Ostrava [Ostrava] (VSB), Ministère de l'Environnement, direction de la Nature et des Paysages |
| Rok vydání: | 2003 |
| Předmět: |
Austenite
Quenching Materials science ALLOYS Metallurgy Alloy TRIP STEELS General Physics and Astronomy [CHIM.MATE]Chemical Sciences/Material chemistry engineering.material Plasticity 01 natural sciences 010305 fluids & plasmas Diffusionless transformation Martensite 0103 physical sciences Ultimate tensile strength AUSTENITE engineering Deformation (engineering) |
| Zdroj: | Journal de Physique IV Proceedings Journal de Physique IV Proceedings, EDP Sciences, 2003, 112, pp.457-460. ⟨10.1051/jp4:2003924⟩ |
| ISSN: | 1155-4339 1764-7177 |
| DOI: | 10.1051/jp4:2003924 |
| Popis: | International audience; Nowadays the possibility to use the TRIP effect (Transformation Induced Plasticity) is stated not only for the high alloy steels but also for the low alloy steels. This effect is connected with the martensitic transformation, but not necessarily the strain induced martensitic transformation induced by deformation provokes the TRIP effect: decisive factors are the chemical composition, the stability of the austenite, its grain size, the particles geometry and their distribution, and also the temperature, amplitude and rate of deformation during the mechanical loading. The change of energy is compared between the creation of the quench and strain induced martensite with and without the TRIP effect. The molar enthalpy released during the creation of quench induced martensite in the continually cooled austenite of the alloy Fe-23.87wt %Ni-0.39wt %C, was calculated from DSC (differential scanning calorimeter) measurements. For this same material, the consumed work during tensile tests was determined at different temperatures. The temperatures interval was between M-s and M-d. At each temperature, a volume fraction of strain induced martensite was created and the TRIP effect could occur, that is both extraordinary great elongation at high ultimate tensile strength and nearly no local deformation (no creation of a neck). This paper concludes with a discussion on the preferences and lacks in the use of TRIP effect in low alloy steels. |
| Databáze: | OpenAIRE |
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