Deformation analysis on F138 austenitic stainless steel: ECAE and rolling

Author(s):Show less -

De Vincentis, N. S. ; Avalos, M. C. ; Kliauga, A. M. ; Sordi, V. L. ; Schell, N. ; Brokmeier, H-G ; Bolmaro, R. E. ; Beausir, B ; Bouaziz, O ; Bouzy, E ; Grosdidier, T ; Toth, LS

• Document type: Journal article
• Source: 9TH WORLD CONGRESS ON COMPUTATIONAL MECHANICS AND 4TH ASIAN PACIFIC CONGRESS ON COMPUTATIONAL MECHANICS; v. 63, p. 11-pg., 2014-01-01.

Abstract

Twinning is an alternative mechanism to achieve ultra-fine grain structures through severe plastic deformation. The properties induced in a plastically deformed material are highly dependent on the degree of deformation, accumulated deformation energy and details on grain sizes and microstructure, which are on the scale of some tens of nanometers; therefore it is very important to understand misorientation distributions and dislocation arrays developed in the samples. In this work an F138 austenitic stainless steel was solution heat treated, deformed by Equal Channel Angular Extrusion (ECAE) at room temperature up to four passes, and rolled up to 70% thickness reduction at room temperature. The microstructure evolution was analyzed by x-ray diffraction and domain sizes calculated by Convolutional Multiple Whole Profile (CMWP) model, the misorientation boundaries were measured by electron backscattered diffraction (EBSD), and transmission electron microscopy. Mechanical behavior was tested by tensile tests. (AU)

• FAPESP's process: 11/02009-0 - Study of texture and mechanical properties of metallic alloys deformed by shear: equal chanel angular extrusion and assymetric rolling
• Grantee: Andrea Madeira Kliauga
• Support Opportunities: Research Grants - Young Investigators Grants