EBSD Investigation to Study the Restoration Mechanism and Substructural Characteristics of 23Cr–6Ni–3Mo Duplex Stainless Steel During Post-deformation Annealing (original) (raw)

Transactions of the Indian Institute of Metals

Abstract

In the present study, microstructural analysis of post-deformation annealed sample has been carried out for 23Cr–6Ni–3Mo duplex stainless steel. It was observed that the restoration mechanism and substructural characteristics were different for austenite and ferrite during post-deformation annealing. In the initial stage of post-deformation annealing, the restoration mechanism of austenite envisaged meta-dynamic recrystallization (MDRX), while the dominating mechanism of softer ferrite showed static recovery (SRV) with a minimal of static recrystallization (SRX). In the intermediate stage, the austenite showed SRX followed by coarsening of meta-dynamically recrystallized grains, and ferrite revealed mostly SRV. The last stage of post-deformation annealing showed the disintegration of substructures in both austenite and ferrite. The microstructure after 20 min of post-deformation annealing displayed coarse subgrains. Finer austenite subgrains were observed as compared to ferrite subgrains after the post-deformation annealing of 20 min. High-resolution EBSD was used to study substructural characteristics of microstructure, and post-processing of microstructural results was made by HKL Channel 5 software. Misorientation angle distribution, subgrain size as well as restoration mechanism corresponding to both austenite and ferrite were determined over intensive sample area.

Mamookho Makhatha hasn't uploaded this paper.

Let Mamookho know you want this paper to be uploaded.

Ask for this paper to be uploaded.