Artículo
Effects of Strain Rate on the TRIP–TWIP Transition of an Austenitic Fe-18Mn-2Si-2Al Steel
Raposo, Marcio Daniel
; Martín, M.; Giordana, María Florencia
; Fuster, Valeria de Los Angeles
; Malarria, Jorge Alberto
Fecha de publicación:
09/2019
Editorial:
Springer
Revista:
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science
ISSN:
1073-5623
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A fully austenitic Fe-18Mn-2Si-2Al transformation-induced plasticity (TRIP) steel was tensile tested from quasi-static to low-dynamic regime at three different strain rates: 4.7 × 10−4, 1.3 × 10−1, and 8.3 × 100 s−1. Typical two-stage transformation mechanism, TRIP γ → ε → α′, was observed for samples tested at 4.7 × 10−4 s−1. At higher strain rates, the increase in temperature due to adiabatic plastic work shifts the stacking fault energy (SFE) towards a twinning-induced plasticity–SFE-range modifying the mechanical behavior of the alloy. This change on the deformation mechanism leads to a lower work hardening capacity and a higher elongation to rupture in samples tested at 1.3 × 10−1 and 8.3 × 100 s−1. In this context, the alloy maintains its energy absorption capability with a maximum reduction of 3.6 pct according to the Rm × A parameter. The Md temperature, experimentally determined in the present study, proved to be a useful tool for understanding the material’s behavior.
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Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
Raposo, Marcio Daniel; Martín, M.; Giordana, María Florencia; Fuster, Valeria de Los Angeles; Malarria, Jorge Alberto; Effects of Strain Rate on the TRIP–TWIP Transition of an Austenitic Fe-18Mn-2Si-2Al Steel; Springer; Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science; 50; 9; 9-2019; 4058-4066
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