EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS

EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS

Bibliographic Details
Main Author: Bryant, Nathan J.
Language:English
Published: Wright State University / OhioLINK 2015
Subjects:
Aerospace Materials
Metallurgy
Materials Science
CALPHAD
High Entropy Alloys
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=wright1433176902
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-wright14331769022021-08-03T06:31:26Z EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS Bryant, Nathan J. Aerospace Materials Metallurgy Materials Science CALPHAD High Entropy Alloys High entropy alloys (HEAs) are a recent area of research in materials science. Their namesake is because their high entropy of mixing due to multiple metallic elements in a near equimolar ratio. The high entropy of mixing is supposed to suppress unwanted, brittle, ordered intermetallic phases, and form a single, randomly mixed solid solution phase. This phenomena makes HEAs a good candidate for structural applications. However, this entropy of mixing may not be enough to suppress all intermetallic phases. For this reason, the CALculation of PHAse Diagrams (CALPHAD) approach is being explored to predict phase equilibrium in HEAs. This study seeks to experimentally validate the current CALPHAD approach when applied to HEAs. Five alloy compositions were characterized with SEM, EDS, and XRD in the as-cast condition and after equilibrium heat treatments of 500hr at 1000°C and 1000hr at 750°C. Phases detected in the experimental alloys were compared with the CALPHAD predicted equilibrium phases. When considerations are taken, the current CALPHAD approach is adequate in predicting phase equilibrium for HEAs. 2015-06-04 English text Wright State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=wright1433176902 http://rave.ohiolink.edu/etdc/view?acc_num=wright1433176902 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Aerospace Materials
Metallurgy
Materials Science
CALPHAD
High Entropy Alloys
spellingShingle Aerospace Materials
Metallurgy
Materials Science
CALPHAD
High Entropy Alloys
Bryant, Nathan J.
EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
author Bryant, Nathan J.
author_facet Bryant, Nathan J.
author_sort Bryant, Nathan J.
title EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
title_short EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
title_full EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
title_fullStr EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
title_full_unstemmed EXPERIMENTAL VALIDATION OF THE CALPHAD APPROACH APPLIED TO MULTI-PRINCIPLE ELEMENT ALLOYS
title_sort experimental validation of the calphad approach applied to multi-principle element alloys
publisher Wright State University / OhioLINK
publishDate 2015
url http://rave.ohiolink.edu/etdc/view?acc_num=wright1433176902
work_keys_str_mv AT bryantnathanj experimentalvalidationofthecalphadapproachappliedtomultiprincipleelementalloys
_version_ 1719438430592565248

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