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Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding

The dynamic recrystallization behavior of 42CrMo steel during the pre-stress hardening grinding (PSHG) process was investigated at temperatures ranging from 850–1150 °C and pre-stress from 0 MPa to 167 MPa. A coupled grain size model considering different grinding conditions was constructed to resea...

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Detalles Bibliográficos
Autores principales: Wang, Yushi, Xiu, Shichao, Zhang, Shengnan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803868/
https://www.ncbi.nlm.nih.gov/pubmed/31557822
http://dx.doi.org/10.3390/ma12193124
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author Wang, Yushi
Xiu, Shichao
Zhang, Shengnan
author_facet Wang, Yushi
Xiu, Shichao
Zhang, Shengnan
author_sort Wang, Yushi
collection PubMed
description The dynamic recrystallization behavior of 42CrMo steel during the pre-stress hardening grinding (PSHG) process was investigated at temperatures ranging from 850–1150 °C and pre-stress from 0 MPa to 167 MPa. A coupled grain size model considering different grinding conditions was constructed to research the grinding process. Microstructure analyses showed that the hardening layer exhibits the typical features of dynamic recrystallization (DRX), and the evolution process of microstructure and grain size can be predicted properly by the model. The volume fraction of DRX grains increases with increasing pre-stress and grinding temperature. The critical condition for DRX grains occurring is that with a grinding depth of 150 µm, pre-stress is larger than 67 MPa, while most of the DRX grains occurred when pre-stress is larger than 100 MPa. Furthermore, the relationship between pre-stress and flow stress has been derived. The result shows that flow stress shows a linearly increasing trend, with the increase of pre-stress at the stage of lower strain.
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spelling pubmed-68038682019-11-18 Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding Wang, Yushi Xiu, Shichao Zhang, Shengnan Materials (Basel) Article The dynamic recrystallization behavior of 42CrMo steel during the pre-stress hardening grinding (PSHG) process was investigated at temperatures ranging from 850–1150 °C and pre-stress from 0 MPa to 167 MPa. A coupled grain size model considering different grinding conditions was constructed to research the grinding process. Microstructure analyses showed that the hardening layer exhibits the typical features of dynamic recrystallization (DRX), and the evolution process of microstructure and grain size can be predicted properly by the model. The volume fraction of DRX grains increases with increasing pre-stress and grinding temperature. The critical condition for DRX grains occurring is that with a grinding depth of 150 µm, pre-stress is larger than 67 MPa, while most of the DRX grains occurred when pre-stress is larger than 100 MPa. Furthermore, the relationship between pre-stress and flow stress has been derived. The result shows that flow stress shows a linearly increasing trend, with the increase of pre-stress at the stage of lower strain. MDPI 2019-09-25 /pmc/articles/PMC6803868/ /pubmed/31557822 http://dx.doi.org/10.3390/ma12193124 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
Wang, Yushi
Xiu, Shichao
Zhang, Shengnan
Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title_full Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title_fullStr Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title_full_unstemmed Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title_short Controlling Grain Sizes of 42CrMo Steel by Pre-Stress Hardening Grinding
title_sort controlling grain sizes of 42crmo steel by pre-stress hardening grinding
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803868/
https://www.ncbi.nlm.nih.gov/pubmed/31557822
http://dx.doi.org/10.3390/ma12193124
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