Influence of Al Additions on the Microstructure and Mechanical Properties of a C and Si-Free High-Mn Steel

Autor(es)

Otani, Lucas ^[1] ; Vidilli, Andre ^[1] ; Coury, Francisco ^[2] ; Kiminami, Claudio ^[2] ; Botta, Walter ^[2] ; Zepon, Guilherme ^[2] ; Bolfarini, Claudemiro ^[2]

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Grad Program Mat Sci & Engn PPGCEM, Rodovia Washington Luis, Km 235, Sao Carlos 13565905, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, RodoviaWashington Luis, Km 235, Sao Carlos 13565905, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: METALS; v. 10, n. 3 MAR 2020.
• Citações Web of Science: 0

Resumo

The lightweight Fe-Mn-Al-C steels have drawn considerable attention from the literature due to their outstanding combination of high ductility and specific strength. Although the mechanical behavior of such steels has been extensively studied, the effect of Al when no C and Si are added has not been investigated in detail. For this reason, the main objective of this work was to study the microstructural evolution and mechanical behavior of carbon and silicon-free high-Mn steels with different aluminum contents. Alloys with 0, 2.5, and 5 wt. % Al were processed by spray forming to ensure high homogeneity and a fully austenitic microstructure. Cold rolling and annealing were performed to obtain a fine grain-sized material. The mechanical properties were similar regardless of the Al content, especially the work hardening rate. Deformation twinning and strain-induced phase transformation were not observed for any of the compositions. Additionally, a dislocation cell-like structure was observed for all of the alloys indicating that the Al additions did not change considerably the dislocation behavior, even though it considerably changed the estimated Stacking Fault Energy (SFE) value for all the alloys studied in this work. (AU)

• Processo FAPESP: 17/14805-1 - Efeito da adição de Al e C nas propriedades mecânicas de aços de baixa densidade conformados por spray
• Beneficiário: Lucas Barcelos Otani
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
• Beneficiário: Claudio Shyinti Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Temático