Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying
Refractory high-entropy alloy (RHEA) is one of the most promising materials for use in high-temperature structural materials. In this study, the WMoNbTaV coatings on 304 stainless steel substrates has been prepared by mechanical alloying (MA). Effects of V addition and subsequent heat treatment on p...
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doaj-c273e895167a431aaff04f57b88ecdcc2021-02-25T00:04:04ZengMDPI AGCoatings2079-64122021-02-011126526510.3390/coatings11030265Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical AlloyingChun-Liang Chen0Sutrisna1Department of Materials Science & Engineering, National Dong Hwa University, Shou-Feng, Hualien 97401, TaiwanDepartment of Materials Science & Engineering, National Dong Hwa University, Shou-Feng, Hualien 97401, TaiwanRefractory high-entropy alloy (RHEA) is one of the most promising materials for use in high-temperature structural materials. In this study, the WMoNbTaV coatings on 304 stainless steel substrates has been prepared by mechanical alloying (MA). Effects of V addition and subsequent heat treatment on properties of the WMoNbTaV coatings were investigated. The results show that the RHEA coatings with nanocrystalline body-centered cubic (BCC) solid-solution phase were generated by the mechanical alloying process. The presence of the V element promotes a uniform microstructure and homogeneous distribution of composition in the RHEA coatings due to improving alloying efficiency, resulting in an increase of hardness. After the annealing treatment of the RHEA coatings, microstructure homogeneity was further enhanced; however, the high affinity of Ta for oxygen causes the formation of Ta-rich oxides. Annealing also removes strain hardening generated by high-energy ball milling and thus decreases the hardness of the RHEA coating and alters microstructure evolution and mechanical properties.https://www.mdpi.com/2079-6412/11/3/265refractory high-entropy alloycoatingmechanical alloyingheat treatment |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chun-Liang Chen Sutrisna |
spellingShingle |
Chun-Liang Chen Sutrisna Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying Coatings refractory high-entropy alloy coating mechanical alloying heat treatment |
author_facet |
Chun-Liang Chen Sutrisna |
author_sort |
Chun-Liang Chen |
title |
Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying |
title_short |
Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying |
title_full |
Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying |
title_fullStr |
Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying |
title_full_unstemmed |
Influence of V and Heat Treatment on Characteristics of WMoNbTaV Refractory High-Entropy Alloy Coatings by Mechanical Alloying |
title_sort |
influence of v and heat treatment on characteristics of wmonbtav refractory high-entropy alloy coatings by mechanical alloying |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2021-02-01 |
description |
Refractory high-entropy alloy (RHEA) is one of the most promising materials for use in high-temperature structural materials. In this study, the WMoNbTaV coatings on 304 stainless steel substrates has been prepared by mechanical alloying (MA). Effects of V addition and subsequent heat treatment on properties of the WMoNbTaV coatings were investigated. The results show that the RHEA coatings with nanocrystalline body-centered cubic (BCC) solid-solution phase were generated by the mechanical alloying process. The presence of the V element promotes a uniform microstructure and homogeneous distribution of composition in the RHEA coatings due to improving alloying efficiency, resulting in an increase of hardness. After the annealing treatment of the RHEA coatings, microstructure homogeneity was further enhanced; however, the high affinity of Ta for oxygen causes the formation of Ta-rich oxides. Annealing also removes strain hardening generated by high-energy ball milling and thus decreases the hardness of the RHEA coating and alters microstructure evolution and mechanical properties. |
topic |
refractory high-entropy alloy coating mechanical alloying heat treatment |
url |
https://www.mdpi.com/2079-6412/11/3/265 |
work_keys_str_mv |
AT chunliangchen influenceofvandheattreatmentoncharacteristicsofwmonbtavrefractoryhighentropyalloycoatingsbymechanicalalloying AT sutrisna influenceofvandheattreatmentoncharacteristicsofwmonbtavrefractoryhighentropyalloycoatingsbymechanicalalloying |
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