Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys
High entropy alloys (HEAs) are a relatively new class of solid solution alloys that contain multiple principal elements to take advantage of their high configurational entropy, sluggish diffusion, lattice distortion, and the cocktail effect. In recent development, work hardening mechanisms known as...
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ndltd-unt.edu-info-ark-67531-metadc15387372021-09-19T05:24:17Z Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys Macdonald, Neil High-Entropy Alloys HEA split-hopkinson SHPB strain-rate dynamic High entropy alloys (HEAs) are a relatively new class of solid solution alloys that contain multiple principal elements to take advantage of their high configurational entropy, sluggish diffusion, lattice distortion, and the cocktail effect. In recent development, work hardening mechanisms known as twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found active in Al0.3CoCrFeNi (molar fraction) and Fe50Mn30Co10Cr10 (at %) HEA compositions. Friction-stir processing was done to increase the mechanical properties and improve the microstructure of the alloys for the purpose of high strain rate performance. Quasi-static tensile tests as well as top-hat geometry Split-Hopkinson pressure bar tests were conducted to view the mechanical properties as well as view the microstructural evolution at dynamic strain rates. Overall, the Al0.3CoCrFeNi condition after friction-stir processing and heat treatment has proved to have the best mechanical properties, and selecting from the conditions in this study, Al0.3CoCrFeNi has better shear localization resistance. University of North Texas Mishra, Rajiv Mukherjee, Sundeep Williams, Jim 2019-08 Thesis or Dissertation viii, 42 pages Text local-cont-no: submission_1738 https://digital.library.unt.edu/ark:/67531/metadc1538737/ ark: ark:/67531/metadc1538737 English Use restricted to UNT Community Macdonald, Neil Copyright Copyright is held by the author, unless otherwise noted. All rights Reserved. |
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High-Entropy Alloys HEA split-hopkinson SHPB strain-rate dynamic |
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High-Entropy Alloys HEA split-hopkinson SHPB strain-rate dynamic Macdonald, Neil Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
description |
High entropy alloys (HEAs) are a relatively new class of solid solution alloys that contain multiple principal elements to take advantage of their high configurational entropy, sluggish diffusion, lattice distortion, and the cocktail effect. In recent development, work hardening mechanisms known as twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found active in Al0.3CoCrFeNi (molar fraction) and Fe50Mn30Co10Cr10 (at %) HEA compositions. Friction-stir processing was done to increase the mechanical properties and improve the microstructure of the alloys for the purpose of high strain rate performance. Quasi-static tensile tests as well as top-hat geometry Split-Hopkinson pressure bar tests were conducted to view the mechanical properties as well as view the microstructural evolution at dynamic strain rates. Overall, the Al0.3CoCrFeNi condition after friction-stir processing and heat treatment has proved to have the best mechanical properties, and selecting from the conditions in this study, Al0.3CoCrFeNi has better shear localization resistance. |
author2 |
Mishra, Rajiv |
author_facet |
Mishra, Rajiv Macdonald, Neil |
author |
Macdonald, Neil |
author_sort |
Macdonald, Neil |
title |
Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
title_short |
Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
title_full |
Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
title_fullStr |
Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
title_full_unstemmed |
Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys |
title_sort |
dynamic deformation and shear localization in friction-stir processed al0.3cocrfeni and fe50mn30co10cr10 high-entropy alloys |
publisher |
University of North Texas |
publishDate |
2019 |
url |
https://digital.library.unt.edu/ark:/67531/metadc1538737/ |
work_keys_str_mv |
AT macdonaldneil dynamicdeformationandshearlocalizationinfrictionstirprocessedal03cocrfeniandfe50mn30co10cr10highentropyalloys |
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1719482569395798016 |