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Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel
The paper is focused on investigation of the high-strength AISI 4340 steel at various temperature and deformation conditions. The article is divided into two specific analyses. The first is to examine the dilatation behavior of the steel at eight different cooling rates, namely, 100, 10, 5, 1, 0.5,...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730636/ https://www.ncbi.nlm.nih.gov/pubmed/33297542 http://dx.doi.org/10.3390/ma13235585 |
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author | Eckert, Maros Krbata, Michal Barenyi, Igor Majerik, Jozef Dubec, Andrej Bokes, Michal |
author_facet | Eckert, Maros Krbata, Michal Barenyi, Igor Majerik, Jozef Dubec, Andrej Bokes, Michal |
author_sort | Eckert, Maros |
collection | PubMed |
description | The paper is focused on investigation of the high-strength AISI 4340 steel at various temperature and deformation conditions. The article is divided into two specific analyses. The first is to examine the dilatation behavior of the steel at eight different cooling rates, namely, 100, 10, 5, 1, 0.5, 0.1, 0.05 and 0.01 °C·s(−1). The mapping of the phase transformations due to varying cooling rates from the austenitizing temperature of 850 °C allows the construction of the CCT diagram for a given high-strength steel. These dilatation curves were also compared with the metallography of the selected samples for the proper construction of the CCT diagram. A further analysis of the high temperature deformation of high strength steel AISI 4340 was performed in the range of temperature 900–1200 °C, and the strain rate was in the range from 0.001 to 10 s(−1) with maximum value of the true strain 0.9. Changes in the microstructure were observed using light optical microscopy (LOM). The effect of hot deformation temperature on true stress, peak stress and true strain was investigated. The hardness of all deformed samples, depending on the temperature, the deformation rate and the peak stress σ(p) overall together related with hardness, has also been evaluated. |
format | Online Article Text |
id | pubmed-7730636 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-77306362020-12-12 Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel Eckert, Maros Krbata, Michal Barenyi, Igor Majerik, Jozef Dubec, Andrej Bokes, Michal Materials (Basel) Article The paper is focused on investigation of the high-strength AISI 4340 steel at various temperature and deformation conditions. The article is divided into two specific analyses. The first is to examine the dilatation behavior of the steel at eight different cooling rates, namely, 100, 10, 5, 1, 0.5, 0.1, 0.05 and 0.01 °C·s(−1). The mapping of the phase transformations due to varying cooling rates from the austenitizing temperature of 850 °C allows the construction of the CCT diagram for a given high-strength steel. These dilatation curves were also compared with the metallography of the selected samples for the proper construction of the CCT diagram. A further analysis of the high temperature deformation of high strength steel AISI 4340 was performed in the range of temperature 900–1200 °C, and the strain rate was in the range from 0.001 to 10 s(−1) with maximum value of the true strain 0.9. Changes in the microstructure were observed using light optical microscopy (LOM). The effect of hot deformation temperature on true stress, peak stress and true strain was investigated. The hardness of all deformed samples, depending on the temperature, the deformation rate and the peak stress σ(p) overall together related with hardness, has also been evaluated. MDPI 2020-12-07 /pmc/articles/PMC7730636/ /pubmed/33297542 http://dx.doi.org/10.3390/ma13235585 Text en © 2020 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 Eckert, Maros Krbata, Michal Barenyi, Igor Majerik, Jozef Dubec, Andrej Bokes, Michal Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title | Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title_full | Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title_fullStr | Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title_full_unstemmed | Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title_short | Effect of Selected Cooling and Deformation Parameters on the Structure and Properties of AISI 4340 Steel |
title_sort | effect of selected cooling and deformation parameters on the structure and properties of aisi 4340 steel |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7730636/ https://www.ncbi.nlm.nih.gov/pubmed/33297542 http://dx.doi.org/10.3390/ma13235585 |
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