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Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion

In this work, commercial AISI 304 stainless steel rods were subjected to cyclic forward/reverse torsion (CFRT) treatments at low-speed and high-speed torsion at room temperature. Microstructures in the core and surface layers of the CFRT-treated samples were systematically characterized. Results sho...

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Detalles Bibliográficos
Autores principales: Zhang, Zhimin, Dong, Qingshan, Song, Bo, He, Hong, Chai, Linjiang, Guo, Ning, Wang, Bingshu, Yao, Zhongwen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384765/
https://www.ncbi.nlm.nih.gov/pubmed/30736410
http://dx.doi.org/10.3390/ma12030506
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author Zhang, Zhimin
Dong, Qingshan
Song, Bo
He, Hong
Chai, Linjiang
Guo, Ning
Wang, Bingshu
Yao, Zhongwen
author_facet Zhang, Zhimin
Dong, Qingshan
Song, Bo
He, Hong
Chai, Linjiang
Guo, Ning
Wang, Bingshu
Yao, Zhongwen
author_sort Zhang, Zhimin
collection PubMed
description In this work, commercial AISI 304 stainless steel rods were subjected to cyclic forward/reverse torsion (CFRT) treatments at low-speed and high-speed torsion at room temperature. Microstructures in the core and surface layers of the CFRT-treated samples were systematically characterized. Results show that the CFRT treatment can introduce martensite phase on the surface of the rods via strain-induced martensitic transformation. High-speed twisting is more effective in inducing martensite in the surface layer compared to low-speed twisting. During the stretching process, the overall strain-hardening behavior of the gradient material is related to the content of its gradient defects. Higher gradient martensite content results in a higher surface hardness of the material, but less overall tensile properties. The effect of twisting speed on torsion behavior and the strain-hardening mechanisms in tensile of the gradient structured steels was also addressed.
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spelling pubmed-63847652019-02-23 Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion Zhang, Zhimin Dong, Qingshan Song, Bo He, Hong Chai, Linjiang Guo, Ning Wang, Bingshu Yao, Zhongwen Materials (Basel) Article In this work, commercial AISI 304 stainless steel rods were subjected to cyclic forward/reverse torsion (CFRT) treatments at low-speed and high-speed torsion at room temperature. Microstructures in the core and surface layers of the CFRT-treated samples were systematically characterized. Results show that the CFRT treatment can introduce martensite phase on the surface of the rods via strain-induced martensitic transformation. High-speed twisting is more effective in inducing martensite in the surface layer compared to low-speed twisting. During the stretching process, the overall strain-hardening behavior of the gradient material is related to the content of its gradient defects. Higher gradient martensite content results in a higher surface hardness of the material, but less overall tensile properties. The effect of twisting speed on torsion behavior and the strain-hardening mechanisms in tensile of the gradient structured steels was also addressed. MDPI 2019-02-07 /pmc/articles/PMC6384765/ /pubmed/30736410 http://dx.doi.org/10.3390/ma12030506 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Zhimin
Dong, Qingshan
Song, Bo
He, Hong
Chai, Linjiang
Guo, Ning
Wang, Bingshu
Yao, Zhongwen
Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title_full Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title_fullStr Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title_full_unstemmed Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title_short Effect of Shear Strain Rate on Microstructure and Properties of Austenitic Steel Processed by Cyclic Forward/Reverse Torsion
title_sort effect of shear strain rate on microstructure and properties of austenitic steel processed by cyclic forward/reverse torsion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384765/
https://www.ncbi.nlm.nih.gov/pubmed/30736410
http://dx.doi.org/10.3390/ma12030506
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