Strain partitioning and texture evolution during cold rolling of AISI 201 austenitic stainless steel

Author(s)

Souza Filho, I. R. ; Zilnyk, K. D. ; Sandim, M. J. R. ; Bolmaro, R. E. ; Sandim, H. R. Z.

• Document type: Journal article
• Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 702, p. 161-172, AUG 15 2017.
• Web of Science Citations: 8

Abstract

Strain partitioning and texture evolution of AISI 201 austenitic stainless steel were investigated upon cold rolling up to a true strain of epsilon = 0.92. epsilon-martensite formation is the main work hardening mechanism at low strains (epsilon = 0.11). With increasing strain, the volume fraction of alpha'-martensite increases with a sigmoidal-like behavior. Remaining untransformed austenite is intensely fragmented by mechanical microtwins. The in-grain mis-orientation increases for all phases up epsilon = 0.51 and then levels off for further strain. Strain partitions evenly between austenite and alpha'-martensite during cold rolling. X-ray texture measurements revealed that austenite develops Goss, Brass and S texture components up to the largest investigated strain. The presence of Brass component at the highest deformation seems to be assisted by mechanical twinning. The texture components of alpha'-martensite belong to the alpha- and gamma-fibers. Texture evolution of epsilon-martensite was followed by electron back scatter diffraction data and results show that texture evolves up to epsilon = 0.51 and remains nearly unchanged at larger strains, similarly as observed for austenite and alpha'-martensite. (AU)

• FAPESP's process: 13/26506-8 - Study of microstructural evolution and its effects on magnetic and electric properties of two stainless steels (ODS-Eurofer and AISI 201)
• Grantee: Maria Jose Ramos Sandim
• Support Opportunities: Regular Research Grants