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

Version 2 2024-06-04, 02:09
Version 1 2020-06-04, 16:10
journal contribution
posted on 2024-06-04, 02:09 authored by P Kumar, Peter HodgsonPeter Hodgson, Hossein BeladiHossein Beladi, ME Makhatha, AK Dutt
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.

History

Journal

Transactions of the Indian Institute of Metals

Volume

73

Pagination

1421-1431

Location

Berlin, Germany

ISSN

0972-2815

eISSN

0975-1645

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2020, The Indian Institute of Metals

Issue

6

Publisher

Springer

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