Microstructure evolution and grain refinement mechanism of 316LN steel

The hot compression behavior of 316LN stainless steel for the supporting system in a magnet confinement fusion reactor was isothermally compressed at 1,050℃ and 0.1 s . Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The res...

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Published inHigh temperature materials and processes Vol. 43; no. 1; pp. id. 44 - 38
Main Authors Zhang, Li, Ren, Jie, Zheng, Zhichao, Guan, Lanfang, Liu, Chengzhi, Liu, Yanlian, Cheng, Shengwei, Su, Zexing, Yang, Fei
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 01.01.2024
Walter de Gruyter GmbH
Subjects
Austenitic stainless steels
Dynamic recrystallization
Electron back scatter
Fusion reactors
Grain boundaries
Grain refinement
hot compression
Hot pressing
Microstructure
Plastic deformation
texture evolution
twinning
Online AccessGet full text
ISSN2191-0324
0334-6455
2191-0324
DOI10.1515/htmp-2024-0038

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Abstract The hot compression behavior of 316LN stainless steel for the supporting system in a magnet confinement fusion reactor was isothermally compressed at 1,050℃ and 0.1 s . Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The results showed that the necklace structure is eventually formed by increasing compression strain due to dynamic recrystallization (DRX). The proportion of low-angle grain boundaries first increases and then decreases. The dominant DRX mechanism of 316LN is discontinuous DRX, which is characterized by the grain boundary bulging. Besides, twinning is found to be induced to accommodate the plastic strain, helping the development of DRX.
AbstractList The hot compression behavior of 316LN stainless steel for the supporting system in a magnet confinement fusion reactor was isothermally compressed at 1,050℃ and 0.1 s −1 . Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The results showed that the necklace structure is eventually formed by increasing compression strain due to dynamic recrystallization (DRX). The proportion of low-angle grain boundaries first increases and then decreases. The dominant DRX mechanism of 316LN is discontinuous DRX, which is characterized by the grain boundary bulging. Besides, twinning is found to be induced to accommodate the plastic strain, helping the development of DRX.
The hot compression behavior of 316LN stainless steel for the supporting system in a magnet confinement fusion reactor was isothermally compressed at 1,050℃ and 0.1 s−1. Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The results showed that the necklace structure is eventually formed by increasing compression strain due to dynamic recrystallization (DRX). The proportion of low-angle grain boundaries first increases and then decreases. The dominant DRX mechanism of 316LN is discontinuous DRX, which is characterized by the grain boundary bulging. Besides, twinning is found to be induced to accommodate the plastic strain, helping the development of DRX.
The hot compression behavior of 316LN stainless steel for the supporting system in a magnet confinement fusion reactor was isothermally compressed at 1,050℃ and 0.1 s . Electron backscatter diffraction was used to study the microstructure and texture evolution during the deformation process. The results showed that the necklace structure is eventually formed by increasing compression strain due to dynamic recrystallization (DRX). The proportion of low-angle grain boundaries first increases and then decreases. The dominant DRX mechanism of 316LN is discontinuous DRX, which is characterized by the grain boundary bulging. Besides, twinning is found to be induced to accommodate the plastic strain, helping the development of DRX.
Author Ren, Jie
Liu, Yanlian
Su, Zexing
Zhang, Li
Zheng, Zhichao
Guan, Lanfang
Liu, Chengzhi
Yang, Fei
Cheng, Shengwei
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SubjectTerms Austenitic stainless steels
Dynamic recrystallization
Electron back scatter
Fusion reactors
Grain boundaries
Grain refinement
hot compression
Hot pressing
Microstructure
Plastic deformation
texture evolution
twinning
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Title Microstructure evolution and grain refinement mechanism of 316LN steel
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