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Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel

316LN stainless steel is a prospective structural material for the nuclear and medical instruments industries. Severe plastic deformation (SPD) combined with annealing possesses have been used to create materials with excellent mechanical properties. In the present work, a series of ultrafine-graine...

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Autores principales: Dong, Yuanyuan, Zhang, Zhe, Yang, Zhihai, Zheng, Ruixiao, Chen, Xu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746113/
https://www.ncbi.nlm.nih.gov/pubmed/35009329
http://dx.doi.org/10.3390/ma15010181
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author Dong, Yuanyuan
Zhang, Zhe
Yang, Zhihai
Zheng, Ruixiao
Chen, Xu
author_facet Dong, Yuanyuan
Zhang, Zhe
Yang, Zhihai
Zheng, Ruixiao
Chen, Xu
author_sort Dong, Yuanyuan
collection PubMed
description 316LN stainless steel is a prospective structural material for the nuclear and medical instruments industries. Severe plastic deformation (SPD) combined with annealing possesses have been used to create materials with excellent mechanical properties. In the present work, a series of ultrafine-grained (UFG) 316LN steels were produced by high-pressure torsion (HPT) and a subsequent annealing process. The effects of annealing temperature on grain recrystallization and precipitation were investigated. Recrystallized UFG 316LN steels can be achieved after annealing at high temperature. The σ phase generates, at grain boundaries, at an annealing temperature range of 750–850 °C. The dislocations induced by recrystallized grain boundaries and strain-induced nanotwins are beneficial for enhancing ductility. Moreover, microcracks are easy to nucleate at the σ phase and the γ-austenite interface, causing unexpected rapid fractures.
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spelling pubmed-87461132022-01-11 Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel Dong, Yuanyuan Zhang, Zhe Yang, Zhihai Zheng, Ruixiao Chen, Xu Materials (Basel) Article 316LN stainless steel is a prospective structural material for the nuclear and medical instruments industries. Severe plastic deformation (SPD) combined with annealing possesses have been used to create materials with excellent mechanical properties. In the present work, a series of ultrafine-grained (UFG) 316LN steels were produced by high-pressure torsion (HPT) and a subsequent annealing process. The effects of annealing temperature on grain recrystallization and precipitation were investigated. Recrystallized UFG 316LN steels can be achieved after annealing at high temperature. The σ phase generates, at grain boundaries, at an annealing temperature range of 750–850 °C. The dislocations induced by recrystallized grain boundaries and strain-induced nanotwins are beneficial for enhancing ductility. Moreover, microcracks are easy to nucleate at the σ phase and the γ-austenite interface, causing unexpected rapid fractures. MDPI 2021-12-27 /pmc/articles/PMC8746113/ /pubmed/35009329 http://dx.doi.org/10.3390/ma15010181 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Dong, Yuanyuan
Zhang, Zhe
Yang, Zhihai
Zheng, Ruixiao
Chen, Xu
Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title_full Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title_fullStr Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title_full_unstemmed Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title_short Effect of Annealing Temperature on the Microstructure and Mechanical Properties of High-Pressure Torsion-Produced 316LN Stainless Steel
title_sort effect of annealing temperature on the microstructure and mechanical properties of high-pressure torsion-produced 316ln stainless steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746113/
https://www.ncbi.nlm.nih.gov/pubmed/35009329
http://dx.doi.org/10.3390/ma15010181
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