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Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures

Lightweight multiprincipal element alloys (MPEAs) are promising candidates for potential application as engineering materials due to their high strength and low density. In this work, lightweight Ti(70)Al(15)V(15) and Ti(80)Al(10)V(10) MPEAs were fabricated via vacuum arc melting. The phases of the...

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Autores principales: Lin, Gongxi, Guo, Ruipeng, Shi, Xiaohui, Han, Lina, Qiao, Junwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9778487/
https://www.ncbi.nlm.nih.gov/pubmed/36554182
http://dx.doi.org/10.3390/e24121777
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author Lin, Gongxi
Guo, Ruipeng
Shi, Xiaohui
Han, Lina
Qiao, Junwei
author_facet Lin, Gongxi
Guo, Ruipeng
Shi, Xiaohui
Han, Lina
Qiao, Junwei
author_sort Lin, Gongxi
collection PubMed
description Lightweight multiprincipal element alloys (MPEAs) are promising candidates for potential application as engineering materials due to their high strength and low density. In this work, lightweight Ti(70)Al(15)V(15) and Ti(80)Al(10)V(10) MPEAs were fabricated via vacuum arc melting. The phases of the Ti(70)Al(15)V(15) alloys consisted of a BCC phase and a small amount of B2 phase while the Ti(80)Al(10)V(10) alloys displayed a dual-phase structure with BCC and HCP phases. The different phase compositions led to differences in their mechanical properties. When the temperature changed from 298 K to 77 K, the strength of the alloys further increased and maintained a certain plasticity. This is attributed to the increasing lattice friction stress at cryogenic temperature. TEM observation demonstrated that dislocation played a crucial role in plastic deformation for both the Ti(70)Al(15)V(15) and Ti(80)Al(10)V(10) alloys. In addition, Ti(80)Al(10)V(10) exhibited significant work-hardening capabilities. By analyzing the strengthening mechanism of the alloys, the theoretical yield strength was calculated, and the results agreed with the experimental values. The present results provide new insight into developing lightweight MPEAs containing Ti and Al.
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spelling pubmed-97784872022-12-23 Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures Lin, Gongxi Guo, Ruipeng Shi, Xiaohui Han, Lina Qiao, Junwei Entropy (Basel) Article Lightweight multiprincipal element alloys (MPEAs) are promising candidates for potential application as engineering materials due to their high strength and low density. In this work, lightweight Ti(70)Al(15)V(15) and Ti(80)Al(10)V(10) MPEAs were fabricated via vacuum arc melting. The phases of the Ti(70)Al(15)V(15) alloys consisted of a BCC phase and a small amount of B2 phase while the Ti(80)Al(10)V(10) alloys displayed a dual-phase structure with BCC and HCP phases. The different phase compositions led to differences in their mechanical properties. When the temperature changed from 298 K to 77 K, the strength of the alloys further increased and maintained a certain plasticity. This is attributed to the increasing lattice friction stress at cryogenic temperature. TEM observation demonstrated that dislocation played a crucial role in plastic deformation for both the Ti(70)Al(15)V(15) and Ti(80)Al(10)V(10) alloys. In addition, Ti(80)Al(10)V(10) exhibited significant work-hardening capabilities. By analyzing the strengthening mechanism of the alloys, the theoretical yield strength was calculated, and the results agreed with the experimental values. The present results provide new insight into developing lightweight MPEAs containing Ti and Al. MDPI 2022-12-05 /pmc/articles/PMC9778487/ /pubmed/36554182 http://dx.doi.org/10.3390/e24121777 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
Lin, Gongxi
Guo, Ruipeng
Shi, Xiaohui
Han, Lina
Qiao, Junwei
Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title_full Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title_fullStr Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title_full_unstemmed Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title_short Lightweight Multiprincipal Element Alloys with Excellent Mechanical Properties at Room and Cryogenic Temperatures
title_sort lightweight multiprincipal element alloys with excellent mechanical properties at room and cryogenic temperatures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9778487/
https://www.ncbi.nlm.nih.gov/pubmed/36554182
http://dx.doi.org/10.3390/e24121777
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