The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy

Investigations of the plastic deformation mechanisms of Ni-W-based heavy alloys varying with increasing temperatures are very important for the development of hot forming processes and applications at elevated temperatures. In this study, the continuous variation of strength and plasticity of a nove...

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Autores principales:	Guoliang Xie, Wenli Xue, Yilei Fu, Kai Feng, Rui Wang, Lei Zheng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	heavy alloy Ni-W-based alloy high-temperature mechanical properties microstructure strengthening mechanisms Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/bc4d8e4718444b2f93e19fc8d0fb479a
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spelling	oai:doaj.org-article:bc4d8e4718444b2f93e19fc8d0fb479a2021-11-25T18:21:42ZThe Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy10.3390/met111117552075-4701https://doaj.org/article/bc4d8e4718444b2f93e19fc8d0fb479a2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1755https://doaj.org/toc/2075-4701Investigations of the plastic deformation mechanisms of Ni-W-based heavy alloys varying with increasing temperatures are very important for the development of hot forming processes and applications at elevated temperatures. In this study, the continuous variation of strength and plasticity of a novel Ni-W-based heavy alloy with increasing temperatures was investigated. The tensile strength of a Ni48W35Co17 sample at 600 °C was 471 MPa, which was 47% lower than that at 100 °C. A variation in an abnormal decrease in elongations at temperatures from 400 °C to 800 °C was found in this alloy. The elongation rate of the sample tensile at 600 °C was 19%, which was 73% lower than that at 100 °C. A microstructural analysis revealed that the number of twins in the sample tensile at a temperature higher than 600 °C increased considerably compared with the sample tensile at lower temperatures, indicating that the dislocation slips were suppressed during the high-temperature stretching process. The precipitates of the NiW phase were found in the 600 °C tensile sample, which was not clearly observed in the 400 °C tensile sample, suggesting that dislocation slips were affected by the formation of these precipitates. Moreover, the orientation relationship between the matrix and NiW phase was (200)Ni//(240)NiW and [001]Ni//[001]NiW. The tiny precipitated phase was the main reason for the plasticity decrease of the alloy with the temperature increase.Guoliang XieWenli XueYilei FuKai FengRui WangLei ZhengMDPI AGarticleheavy alloyNi-W-based alloyhigh-temperature mechanical propertiesmicrostructurestrengthening mechanismsMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1755, p 1755 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heavy alloy Ni-W-based alloy high-temperature mechanical properties microstructure strengthening mechanisms Mining engineering. Metallurgy TN1-997
spellingShingle	heavy alloy Ni-W-based alloy high-temperature mechanical properties microstructure strengthening mechanisms Mining engineering. Metallurgy TN1-997 Guoliang Xie Wenli Xue Yilei Fu Kai Feng Rui Wang Lei Zheng The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
description	Investigations of the plastic deformation mechanisms of Ni-W-based heavy alloys varying with increasing temperatures are very important for the development of hot forming processes and applications at elevated temperatures. In this study, the continuous variation of strength and plasticity of a novel Ni-W-based heavy alloy with increasing temperatures was investigated. The tensile strength of a Ni48W35Co17 sample at 600 °C was 471 MPa, which was 47% lower than that at 100 °C. A variation in an abnormal decrease in elongations at temperatures from 400 °C to 800 °C was found in this alloy. The elongation rate of the sample tensile at 600 °C was 19%, which was 73% lower than that at 100 °C. A microstructural analysis revealed that the number of twins in the sample tensile at a temperature higher than 600 °C increased considerably compared with the sample tensile at lower temperatures, indicating that the dislocation slips were suppressed during the high-temperature stretching process. The precipitates of the NiW phase were found in the 600 °C tensile sample, which was not clearly observed in the 400 °C tensile sample, suggesting that dislocation slips were affected by the formation of these precipitates. Moreover, the orientation relationship between the matrix and NiW phase was (200)Ni//(240)NiW and [001]Ni//[001]NiW. The tiny precipitated phase was the main reason for the plasticity decrease of the alloy with the temperature increase.
format	article
author	Guoliang Xie Wenli Xue Yilei Fu Kai Feng Rui Wang Lei Zheng
author_facet	Guoliang Xie Wenli Xue Yilei Fu Kai Feng Rui Wang Lei Zheng
author_sort	Guoliang Xie
title	The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
title_short	The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
title_full	The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
title_fullStr	The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
title_full_unstemmed	The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy
title_sort	deformation behaviors and mechanism of the high-temperature mechanical properties of a ni48w35co17 alloy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/bc4d8e4718444b2f93e19fc8d0fb479a
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The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy

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