Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy

In this study, the effects of spinodal decomposition on the microstructures and mechanical properties of a TiZrNbTa alloy are investigated. The as-cast TiZrNbTa alloy possesses dual phases of TiZr-rich inter-dendrite (ID) and NbTa-rich dendrite (DR) domains, both of which have a body-centered cubic...

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Main Authors:	Tai-You Liu, Jacob C. Huang, Wen-Shuo Chuang, Hung-Sheng Chou, Jui-Yu Wei, Chih-Yeh Chao, Yu-Chin Liao, Jason S.C. Jang
Format:	Article
Language:	English
Published:	MDPI AG 2019-10-01
Series:	Materials
Subjects:	high entropy alloy spinodal decomposition strengthening precipitate
Online Access:	https://www.mdpi.com/1996-1944/12/21/3508

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spelling	doaj-482c08268df9417baa723fe429cab7252020-11-25T02:33:14ZengMDPI AGMaterials1996-19442019-10-011221350810.3390/ma12213508ma12213508Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy AlloyTai-You Liu0Jacob C. Huang1Wen-Shuo Chuang2Hung-Sheng Chou3Jui-Yu Wei4Chih-Yeh Chao5Yu-Chin Liao6Jason S.C. Jang7Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, TaiwanDepartment of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, TaiwanDepartment of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, TaiwanDepartment of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, TaiwanDepartment of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, TaiwanDepartment of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 912, TaiwanDepartment of Mechanical Engineering, National Central University, Taoyuan 320, TaiwanDepartment of Mechanical Engineering, National Central University, Taoyuan 320, TaiwanIn this study, the effects of spinodal decomposition on the microstructures and mechanical properties of a TiZrNbTa alloy are investigated. The as-cast TiZrNbTa alloy possesses dual phases of TiZr-rich inter-dendrite (ID) and NbTa-rich dendrite (DR) domains, both of which have a body-centered cubic (BCC) structure. In the DRs of the as-cast alloy, the α and ω precipitates are found to be uniformly distributed. After homogenization at 1100 °C for 24 h followed by water quenching, spinodal decomposition occurs and an interconnected structure with a wavelength of 20 nm is formed. The α and ω precipitates remained in the structure. Such a fine spinodal structure strengthens the alloy effectively. Detailed strengthening calculations were conducted in order to estimate the strengthening contributions from the α and ω precipitates, as well as the spinodal decomposition microstructure.https://www.mdpi.com/1996-1944/12/21/3508high entropy alloyspinodal decompositionstrengtheningprecipitate
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Tai-You Liu Jacob C. Huang Wen-Shuo Chuang Hung-Sheng Chou Jui-Yu Wei Chih-Yeh Chao Yu-Chin Liao Jason S.C. Jang
spellingShingle	Tai-You Liu Jacob C. Huang Wen-Shuo Chuang Hung-Sheng Chou Jui-Yu Wei Chih-Yeh Chao Yu-Chin Liao Jason S.C. Jang Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy Materials high entropy alloy spinodal decomposition strengthening precipitate
author_facet	Tai-You Liu Jacob C. Huang Wen-Shuo Chuang Hung-Sheng Chou Jui-Yu Wei Chih-Yeh Chao Yu-Chin Liao Jason S.C. Jang
author_sort	Tai-You Liu
title	Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy
title_short	Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy
title_full	Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy
title_fullStr	Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy
title_full_unstemmed	Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy
title_sort	spinodal decomposition and mechanical response of a tizrnbta high-entropy alloy
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2019-10-01
description	In this study, the effects of spinodal decomposition on the microstructures and mechanical properties of a TiZrNbTa alloy are investigated. The as-cast TiZrNbTa alloy possesses dual phases of TiZr-rich inter-dendrite (ID) and NbTa-rich dendrite (DR) domains, both of which have a body-centered cubic (BCC) structure. In the DRs of the as-cast alloy, the α and ω precipitates are found to be uniformly distributed. After homogenization at 1100 °C for 24 h followed by water quenching, spinodal decomposition occurs and an interconnected structure with a wavelength of 20 nm is formed. The α and ω precipitates remained in the structure. Such a fine spinodal structure strengthens the alloy effectively. Detailed strengthening calculations were conducted in order to estimate the strengthening contributions from the α and ω precipitates, as well as the spinodal decomposition microstructure.
topic	high entropy alloy spinodal decomposition strengthening precipitate
url	https://www.mdpi.com/1996-1944/12/21/3508
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Spinodal Decomposition and Mechanical Response of a TiZrNbTa High-Entropy Alloy

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