Annealing Behavior in a High-Pressure Torsion-Processed Fe—9Cr Steel

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.

Department(s)

Materials Science and Engineering

Comments

This research is financially supported by US Department of Energy, Office of Nuclear Energy, through the NEET-NSUF (Nuclear Energy Enabling Technology-Nuclear Science User Facility) program (Award Number DE-NE0008524). R. Islamgaliev is grateful to the RSF Project No 19-19-00496. R.

Keywords and Phrases

Annealing; Grain Growth; Pressing (Forming); Textures; Torsional Stress, Annealing Behavior; High Angle Boundaries; High Pressure Torsions; High-Temperature Annealing; Low Angle Boundaries; Second Phase Particles; Texture Components; Texture Evolutions, Equal Channel Angular Pressing

International Standard Serial Number (ISSN)

0022-2461; 1573-4803

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2020 Springer, All rights reserved.

Publication Date

01 Jun 2020

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