Insights into high-temperature oxidation of Fe-Mn-Si-Cr-Ni shape memory stainless steels and its relationship to alloy chemical composition

Author(s)

Silva, R. ^[1] ; Vacchi, G. S. ^[1] ; Santos, I. G. R. ^[1] ; de Sousa Malafaia, A. M. ^[2] ; Kugelmeier, C. L. ^[1] ; Mendes Filho, A. A. ^[3] ; Pascal, C. ^[4] ; Sordi, V. L. ^[1] ; Rovere, C. A. D. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Mat Engn, Munir Rachid Corros Lab, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Fed Univ Scio Joao Del Rei, Dept Mech Engn, Praca Frei Orlando 170, BR-36307352 Sao Joao Del Rei, MG - Brazil

^[3] Fed Univ ABC, Engn Modeling & Appl Social Sci Ctr CECS, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[4] Univ Grenoble Alpes, CNRS, Grenoble DIP, SIMaP, F-38000 Grenoble - France

• Document type: Journal article
• Source: Corrosion Science; v. 163, FEB 2020.
• Web of Science Citations: 0

Abstract

The relationship between alloy chemical composition and oxidation behavior of austenitic Fe-Mn-Si-Cr-Ni shape memory stainless steels (SMSSs) during exposure at 800 degrees C in air was investigated. Although high Si and Cr additions are beneficial for both the shape memory effect and oxidation resistance, the increase of these ferrite stabilizer elements in Fe-Mn-Si-Cr-Ni SMSSs makes the oxidation-induced ferrite stable at the early stages of the oxidation exposure, which in turn allows a faster diffusion of Mn, controlling the kinetics of oxidation. Our results suggested that the austenite stability should be maintained during the oxidation process for higher performance of these materials. (AU)

• FAPESP's process: 18/20467-4 - High temperature oxidation behavior of a Fe-Mn-Si-Cr-Ni-Ce shape memory stainless steel
• Grantee: Caique Augusto Teixeira Alberto
• Support Opportunities: Scholarships in Brazil - Scientific Initiation