Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure

Abstract Multi-principal element alloys represent a new paradigm in structural alloy design with superior mechanical properties and promising ballistic performance. Here, the mechanical response of Al0.3CoCrFeNi alloy, with unique bimodal microstructure, was evaluated at quasistatic, dynamic, and ba...

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Autores principales:	Saideep Muskeri, Bharat Gwalani, Shristy Jha, Anqi Yu, Philip A. Jannotti, Ravi Sankar Haridas, Brian E. Schuster, Jeffrey T. Lloyd, Rajiv S. Mishra, Sundeep Mukherjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6417293c005d400e9b12d8df95d3a1f2
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spelling	oai:doaj.org-article:6417293c005d400e9b12d8df95d3a1f22021-11-28T12:18:38ZExcellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure10.1038/s41598-021-02209-y2045-2322https://doaj.org/article/6417293c005d400e9b12d8df95d3a1f22021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02209-yhttps://doaj.org/toc/2045-2322Abstract Multi-principal element alloys represent a new paradigm in structural alloy design with superior mechanical properties and promising ballistic performance. Here, the mechanical response of Al0.3CoCrFeNi alloy, with unique bimodal microstructure, was evaluated at quasistatic, dynamic, and ballistic strain rates. The microstructure after quasistatic deformation was dominated by highly deformed grains. High density of deformation bands was observed at dynamic strain rates but there was no indication of adiabatic shear bands, cracks, or twinning. The ballistic response was evaluated by impacting a 12 mm thick plate with 6.35 mm WC projectiles at velocities ranging from 1066 to 1465 m/s. The deformed microstructure after ballistic impact was dominated by adiabatic shear bands, shear band induced cracks, microbands, and dynamic recrystallization. The superior ballistic response of this alloy compared with similar AlxCoCrFeNi alloys was attributed to its bimodal microstructure, nano-scale L12 precipitation, and grain boundary B2 precipitates. Deformation mechanisms at quasistatic and dynamic strain rates were primarily characterized by extensive dislocation slip and low density of stacking faults. Deformation mechanisms at ballistic strain rates were characterized by grain rotation, disordering of the L12 phase, and high density of stacking faults.Saideep MuskeriBharat GwalaniShristy JhaAnqi YuPhilip A. JannottiRavi Sankar HaridasBrian E. SchusterJeffrey T. LloydRajiv S. MishraSundeep MukherjeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Saideep Muskeri Bharat Gwalani Shristy Jha Anqi Yu Philip A. Jannotti Ravi Sankar Haridas Brian E. Schuster Jeffrey T. Lloyd Rajiv S. Mishra Sundeep Mukherjee Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
description	Abstract Multi-principal element alloys represent a new paradigm in structural alloy design with superior mechanical properties and promising ballistic performance. Here, the mechanical response of Al0.3CoCrFeNi alloy, with unique bimodal microstructure, was evaluated at quasistatic, dynamic, and ballistic strain rates. The microstructure after quasistatic deformation was dominated by highly deformed grains. High density of deformation bands was observed at dynamic strain rates but there was no indication of adiabatic shear bands, cracks, or twinning. The ballistic response was evaluated by impacting a 12 mm thick plate with 6.35 mm WC projectiles at velocities ranging from 1066 to 1465 m/s. The deformed microstructure after ballistic impact was dominated by adiabatic shear bands, shear band induced cracks, microbands, and dynamic recrystallization. The superior ballistic response of this alloy compared with similar AlxCoCrFeNi alloys was attributed to its bimodal microstructure, nano-scale L12 precipitation, and grain boundary B2 precipitates. Deformation mechanisms at quasistatic and dynamic strain rates were primarily characterized by extensive dislocation slip and low density of stacking faults. Deformation mechanisms at ballistic strain rates were characterized by grain rotation, disordering of the L12 phase, and high density of stacking faults.
format	article
author	Saideep Muskeri Bharat Gwalani Shristy Jha Anqi Yu Philip A. Jannotti Ravi Sankar Haridas Brian E. Schuster Jeffrey T. Lloyd Rajiv S. Mishra Sundeep Mukherjee
author_facet	Saideep Muskeri Bharat Gwalani Shristy Jha Anqi Yu Philip A. Jannotti Ravi Sankar Haridas Brian E. Schuster Jeffrey T. Lloyd Rajiv S. Mishra Sundeep Mukherjee
author_sort	Saideep Muskeri
title	Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
title_short	Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
title_full	Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
title_fullStr	Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
title_full_unstemmed	Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure
title_sort	excellent ballistic impact resistance of al0.3cocrfeni multi-principal element alloy with unique bimodal microstructure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6417293c005d400e9b12d8df95d3a1f2
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Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure

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