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Journal of Materials Science

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25-03-2020 | Metals & corrosion

Annealing behavior in a high-pressure torsion-processed Fe–9Cr steel

Authors: Jiaqi Duan, Haiming Wen, Caizhi Zhou, Xiaoqing He, Rinat Islamgaliev, Ruslan Valiev

Published in: Journal of Materials Science | Issue 18/2020

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Abstract

A Fe–9Cr steel containing second-phase particles was processed by ten rotations of high-pressure torsion (HPT) to produce a microstructure consisting of pancake-shaped nanoscaled grains with dominantly high-angle boundaries. Annealing was carried out on the HPT-processed Fe–9Cr steel from 500 to 700 °C up to 48 h. During the annealing, grains grew in a continuous manner. During high-temperature annealing (above 600 °C), a higher fraction of low-angle boundaries was observed when texture J became the dominant texture component. The annealing behavior of the HPT-processed Fe–9Cr steel was compared to that of the equal-channel angular pressing (ECAP)-processed Fe–9Cr steel. It was found ECAP Fe–9Cr showed a different grain growth mode, i.e., discontinuous growth, and a higher degree of thermal stability. Our studies provide insights into how the annealing behavior is affected by the microstructure and texture evolution.

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Title: Annealing behavior in a high-pressure torsion-processed Fe–9Cr steel
Authors: Jiaqi Duan
Haiming Wen
Caizhi Zhou
Xiaoqing He
Rinat Islamgaliev
Ruslan Valiev
Publication date: 25-03-2020
Publisher: Springer US
Published in: Journal of Materials Science / Issue 18/2020
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-020-04560-3

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