Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys

Abstract The behavior of γ–β/β0 phase transition in TiAl alloy doped with β stabilizers (V, Cr, Mn) are studied by using the first principles method. It is found that alloying addition as well as anharmonic lattice vibration and disordered atomic occupation contributes to enhance the stability of cu...

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Autores principales:	Lin Zhu, Hui-Chun Xue, Shu-Xin Yao, Lin Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/02466ebe2c5440a2aa639b95fe434818
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spelling	oai:doaj.org-article:02466ebe2c5440a2aa639b95fe4348182021-12-02T15:38:10ZTransition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys10.1038/s41598-021-89273-62045-2322https://doaj.org/article/02466ebe2c5440a2aa639b95fe4348182021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89273-6https://doaj.org/toc/2045-2322Abstract The behavior of γ–β/β0 phase transition in TiAl alloy doped with β stabilizers (V, Cr, Mn) are studied by using the first principles method. It is found that alloying addition as well as anharmonic lattice vibration and disordered atomic occupation contributes to enhance the stability of cubic structure and accordingly introduce the disordered β phase into the high-temperature microstructure. The formation of low-temperature β0 phase originates from not only the stabilization of cubic structure but also the destabilization of tetragonal structure. In particular, the latter is the main reason for the premature precipitation of the hard-brittle β0 phase in the room-temperature microstructure at low nominal doping concentrations. We also find a special doping region in which the γ and the β phases are stable, while the β0 phase is unstable. The existence of this region provides an opportunity for the regulation of the contents of β and β0 phases.Lin ZhuHui-Chun XueShu-Xin YaoLin LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lin Zhu Hui-Chun Xue Shu-Xin Yao Lin Li Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
description	Abstract The behavior of γ–β/β0 phase transition in TiAl alloy doped with β stabilizers (V, Cr, Mn) are studied by using the first principles method. It is found that alloying addition as well as anharmonic lattice vibration and disordered atomic occupation contributes to enhance the stability of cubic structure and accordingly introduce the disordered β phase into the high-temperature microstructure. The formation of low-temperature β0 phase originates from not only the stabilization of cubic structure but also the destabilization of tetragonal structure. In particular, the latter is the main reason for the premature precipitation of the hard-brittle β0 phase in the room-temperature microstructure at low nominal doping concentrations. We also find a special doping region in which the γ and the β phases are stable, while the β0 phase is unstable. The existence of this region provides an opportunity for the regulation of the contents of β and β0 phases.
format	article
author	Lin Zhu Hui-Chun Xue Shu-Xin Yao Lin Li
author_facet	Lin Zhu Hui-Chun Xue Shu-Xin Yao Lin Li
author_sort	Lin Zhu
title	Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
title_short	Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
title_full	Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
title_fullStr	Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
title_full_unstemmed	Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys
title_sort	transition behaviors of γ–β0/β in v-, cr-, mn-doped tial alloys
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/02466ebe2c5440a2aa639b95fe434818
work_keys_str_mv	AT linzhu transitionbehaviorsofgb0binvcrmndopedtialalloys AT huichunxue transitionbehaviorsofgb0binvcrmndopedtialalloys AT shuxinyao transitionbehaviorsofgb0binvcrmndopedtialalloys AT linli transitionbehaviorsofgb0binvcrmndopedtialalloys
_version_	1718386151692173312

Transition behaviors of γ–β0/β in V-, Cr-, Mn-doped TiAl alloys

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