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The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel

The present study investigates the microstructure and mechanical properties of ultra-low carbon bainitic steel (UCBS) under different cold rolling reductions. When the rolling reduction ratios were increased to 80%, the microstructure was refined, and the lath width of the bainite decreased from 601...

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Autores principales: Wang, Zemin, Dong, Yu, Li, Jiajun, Chai, Feng, Wang, Lianbo, Liu, Qingdong, Fu, Bin, Liu, Min, Wang, Zhanyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9102471/
https://www.ncbi.nlm.nih.gov/pubmed/35591405
http://dx.doi.org/10.3390/ma15093070
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author Wang, Zemin
Dong, Yu
Li, Jiajun
Chai, Feng
Wang, Lianbo
Liu, Qingdong
Fu, Bin
Liu, Min
Wang, Zhanyong
author_facet Wang, Zemin
Dong, Yu
Li, Jiajun
Chai, Feng
Wang, Lianbo
Liu, Qingdong
Fu, Bin
Liu, Min
Wang, Zhanyong
author_sort Wang, Zemin
collection PubMed
description The present study investigates the microstructure and mechanical properties of ultra-low carbon bainitic steel (UCBS) under different cold rolling reductions. When the rolling reduction ratios were increased to 80%, the microstructure was refined, and the lath width of the bainite decreased from 601 nm to 252 nm. The ultimate tensile strength and yield strength increased from 812 MPa and 683 MPa to 1195 MPa and 1150 MPa, respectively, whereas the elongation decreased from 15.9% to 7.9%. In addition, the dislocation density increased from 8.3 × 10(13) m(−2) to 4.87 × 10(14) m(−2) and a stronger γ-fiber texture was obtained at the 80% cold rolling reduction ratio. The local stress distribution and kernel average misorientation were not uniform and became more severe with increased rolling reduction ratios. The strength increment of UCBS was primarily due to boundary strengthening and dislocation strengthening. The theoretical strength increment agreed well with the experimental measurements, which can be helpful for the design and production of UCBS for broad engineering applications.
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spelling pubmed-91024712022-05-14 The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel Wang, Zemin Dong, Yu Li, Jiajun Chai, Feng Wang, Lianbo Liu, Qingdong Fu, Bin Liu, Min Wang, Zhanyong Materials (Basel) Article The present study investigates the microstructure and mechanical properties of ultra-low carbon bainitic steel (UCBS) under different cold rolling reductions. When the rolling reduction ratios were increased to 80%, the microstructure was refined, and the lath width of the bainite decreased from 601 nm to 252 nm. The ultimate tensile strength and yield strength increased from 812 MPa and 683 MPa to 1195 MPa and 1150 MPa, respectively, whereas the elongation decreased from 15.9% to 7.9%. In addition, the dislocation density increased from 8.3 × 10(13) m(−2) to 4.87 × 10(14) m(−2) and a stronger γ-fiber texture was obtained at the 80% cold rolling reduction ratio. The local stress distribution and kernel average misorientation were not uniform and became more severe with increased rolling reduction ratios. The strength increment of UCBS was primarily due to boundary strengthening and dislocation strengthening. The theoretical strength increment agreed well with the experimental measurements, which can be helpful for the design and production of UCBS for broad engineering applications. MDPI 2022-04-23 /pmc/articles/PMC9102471/ /pubmed/35591405 http://dx.doi.org/10.3390/ma15093070 Text en © 2022 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
Wang, Zemin
Dong, Yu
Li, Jiajun
Chai, Feng
Wang, Lianbo
Liu, Qingdong
Fu, Bin
Liu, Min
Wang, Zhanyong
The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title_full The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title_fullStr The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title_full_unstemmed The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title_short The Role of Cold Rolling Reduction on the Microstructure and Mechanical Properties of Ultra-Low Carbon Bainitic Steel
title_sort role of cold rolling reduction on the microstructure and mechanical properties of ultra-low carbon bainitic steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9102471/
https://www.ncbi.nlm.nih.gov/pubmed/35591405
http://dx.doi.org/10.3390/ma15093070
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