Microstructure And Texture Evolution During Cold-Rolling In The Fe-23Mn-3Si-3Al Alloy

Abstract

Fe–23wt.%Mn–3wt.%Si–3wt.%Al alloy was cast, homogenized at 1150ºC, hot-rolled at temperatures between 1200ºC and 900ºC and next cold-rolled from 5% up to 40% reductions in thickness. Microstructure and texture of this alloy, which has a low stacking fault energy, were defined after cold-rolling. Investigation of transmission electron microscopy and X-ray diffraction showed that mechanical twinning and martensitic transformations (γfcc→εhcp and γfcc→εhcp→α′bcc) took place during cold-rolling. The crystallographic Shoji-Nishiyama (S-N) {00.2}ε║{111}γ, ε ║ γ and Kurdjumov-Sachs (K-S) {111}γ║{101}α’, γ║α’ relations between martensite (ε, α’) and austenite (γ), were found in the coldrolled material.

Keywords

• Microstructure
• Texture
• Alloy
• TRIP-effect
• TWIP-effect