Metal/oxide interface roughness evolution mechanism of an FeMnSiCrNiCe shape memory stainless steel under high temperature oxidation

Author(s)

Rabelo, L. F. P. ^[1] ; Silva, R. ^[2] ; Della Rovere, C. A. ^[2] ; de Sousa Malafaia, A. M. ^[1]

Affiliation

^[1] Univ Fed Sao Joao del Rei, Dept Mech Engn, Praca Frei Orlando 170, BR-36307352 Sao Joao Del Rei, MG - Brazil

^[2] Univ Fed Sao Carlos, Dept Mat Engn, Munir Rachid Corros Lab, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

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

Abstract

Previous findings demonstrated roughness increase in the oxide/ferritic Mn-depleted zone interface in an austenitic FeMnSiCrNi shape memory stainless steel (SMSS) cyclic oxidized, generated by plastic deformation. The main aim here was to assess the causes of roughness evolution during cyclic oxidation of an FeMnSiCrNiCe SMSS at 950 degrees C. Thus, isothermal and cyclic oxidation tests were conducted, metal/oxide interface roughness was measured and the oxide layers characterized. The isothermal tests on the FeMnSiCrNiCe SMSS samples demonstrated increasing roughness, however less than after cyclic tests, allowing the identification of a more complete mechanism, where oxide growth and chemical effects also take place. (AU)

• FAPESP's process: 12/16113-6 - ELABORATION, CHARACTERIZATION AND CORROSION RESISTANCE OF SHAPE MEMORY STAINLESS STEELS
• Grantee: Carlos Alberto Della Rovere
• Support type: Scholarships in Brazil - Post-Doctorate