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Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material

High-temperature tensile testing of AH36 material in a wide range of temperatures (1173–1573 K) and strain rates (10(−4)–10(−2) s(−1)) has been obtained by using a Gleeble system. These experimental stress-strain data have been adopted to develop the constitutive equation. The constitutive equation...

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Autores principales: Qin, Qin, Tian, Ming-Liang, Zhang, Peng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5507010/
https://www.ncbi.nlm.nih.gov/pubmed/28772767
http://dx.doi.org/10.3390/ma10040407
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author Qin, Qin
Tian, Ming-Liang
Zhang, Peng
author_facet Qin, Qin
Tian, Ming-Liang
Zhang, Peng
author_sort Qin, Qin
collection PubMed
description High-temperature tensile testing of AH36 material in a wide range of temperatures (1173–1573 K) and strain rates (10(−4)–10(−2) s(−1)) has been obtained by using a Gleeble system. These experimental stress-strain data have been adopted to develop the constitutive equation. The constitutive equation of AH36 material was suggested based on the modified Arrhenius-type equation and the modified Rossard equation respectively. The results indicate that the constitutive equation is strongly influenced by temperature and strain, especially strain. Moreover, there is a good agreement between the predicted data of the modified Arrhenius-type equation and the experimental results when the strain is greater than 0.02. There is also good agreement between the predicted data of the Rossard equation and the experimental results when the strain is less than 0.02. Therefore, a coupled equation where the modified Arrhenius-type equation and Rossard equation are combined has been proposed to describe the constitutive equation of AH36 material according to the different strain values in order to improve the accuracy. The correlation coefficient between the computed and experimental flow stress data was 0.998. The minimum value of the average absolute relative error shows the high accuracy of the coupled equation compared with the two modified equations.
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spelling pubmed-55070102017-07-28 Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material Qin, Qin Tian, Ming-Liang Zhang, Peng Materials (Basel) Article High-temperature tensile testing of AH36 material in a wide range of temperatures (1173–1573 K) and strain rates (10(−4)–10(−2) s(−1)) has been obtained by using a Gleeble system. These experimental stress-strain data have been adopted to develop the constitutive equation. The constitutive equation of AH36 material was suggested based on the modified Arrhenius-type equation and the modified Rossard equation respectively. The results indicate that the constitutive equation is strongly influenced by temperature and strain, especially strain. Moreover, there is a good agreement between the predicted data of the modified Arrhenius-type equation and the experimental results when the strain is greater than 0.02. There is also good agreement between the predicted data of the Rossard equation and the experimental results when the strain is less than 0.02. Therefore, a coupled equation where the modified Arrhenius-type equation and Rossard equation are combined has been proposed to describe the constitutive equation of AH36 material according to the different strain values in order to improve the accuracy. The correlation coefficient between the computed and experimental flow stress data was 0.998. The minimum value of the average absolute relative error shows the high accuracy of the coupled equation compared with the two modified equations. MDPI 2017-04-13 /pmc/articles/PMC5507010/ /pubmed/28772767 http://dx.doi.org/10.3390/ma10040407 Text en © 2017 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
Qin, Qin
Tian, Ming-Liang
Zhang, Peng
Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title_full Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title_fullStr Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title_full_unstemmed Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title_short Investigation of a Coupled Arrhenius-Type/Rossard Equation of AH36 Material
title_sort investigation of a coupled arrhenius-type/rossard equation of ah36 material
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5507010/
https://www.ncbi.nlm.nih.gov/pubmed/28772767
http://dx.doi.org/10.3390/ma10040407
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