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Title: Lattice variations of Ti-6Al-4V alloy with hydrogen content

Abstract

Effect of hydrogen content on the lattice parameter of Ti-6Al-4V alloy has been investigated by X-ray diffraction. The experimental results show that the solution of hydrogen in the Ti-6Al-4V alloy affects significantly on the lattice parameters of {alpha}, {beta} and {delta} phases, especially the {beta} phase. Furthermore, the critical hydrogen content of {delta} hydride formation for Ti-6Al-4V alloy is 0.385 wt.%. When the hydrogen content is lower than the critical hydrogen content, the {delta} hydride cannot precipitate and the lattice parameter ({alpha}) of {beta} phase linearly increases with the increasing of hydrogen content. When the hydrogen content is higher than the critical hydrogen content, the {delta} hydride precipitates and the lattice parameter ({alpha}) of {beta} phase varies inconspicuously with hydrogen content. In addition, the effects of lattice variations and {delta} hydride formation on microstructure are discussed. The {alpha}/{beta} interfaces of lamellar transformed {beta} phase become fuzzy with the increasing of hydrogen content because of the lattice expansion of {beta} phase. Compared with that of the Ti-6Al-4V alloy at low hydrogen content ({<=} 0.385 wt.%), the contrasts of primary {alpha} phase and transformed {beta} phase of Ti-6Al-4V alloy at high hydrogen content ({>=} 0.385 wt.%) were completely reversed due to themore » formation of {delta} hydride. - Research Highlights: {yields} A novel method for determining {delta} hydride in Ti-6Al-4V alloy is presented. {yields} The critical hydrogen content of {delta} hydride formation is 0.385 wt.%. {yields} The lattice parameter of {beta} phase can be expressed as follows: a=0.323(1+9.9x10{sup -2}C{sub H}) . {yields} Precipitation of {delta} hydride has a significant influence on the microstructure. {yields} The {alpha}/{beta} interfaces of transformed {beta} phase became fuzzy in the hydrogenated alloy.« less

Authors:
;
Publication Date:
OSTI Identifier:
22066371
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 62; Journal Issue: 7; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; CONCENTRATION RATIO; HYDRIDES; HYDROGEN; INTERFACES; LATTICE PARAMETERS; MICROSTRUCTURE; PRECIPITATION; TITANIUM BASE ALLOYS; VANADIUM ALLOYS; VARIATIONS; X-RAY DIFFRACTION

Citation Formats

Zhu Tangkui, E-mail: zhutangkui@sohu.com, and Li, Miaoquan, E-mail: honeymli@nwpu.edu.cn. Lattice variations of Ti-6Al-4V alloy with hydrogen content. United States: N. p., 2011. Web. doi:10.1016/J.MATCHAR.2011.04.019.
Zhu Tangkui, E-mail: zhutangkui@sohu.com, & Li, Miaoquan, E-mail: honeymli@nwpu.edu.cn. Lattice variations of Ti-6Al-4V alloy with hydrogen content. United States. doi:10.1016/J.MATCHAR.2011.04.019.
Zhu Tangkui, E-mail: zhutangkui@sohu.com, and Li, Miaoquan, E-mail: honeymli@nwpu.edu.cn. Fri . "Lattice variations of Ti-6Al-4V alloy with hydrogen content". United States. doi:10.1016/J.MATCHAR.2011.04.019.
@article{osti_22066371,
title = {Lattice variations of Ti-6Al-4V alloy with hydrogen content},
author = {Zhu Tangkui, E-mail: zhutangkui@sohu.com and Li, Miaoquan, E-mail: honeymli@nwpu.edu.cn},
abstractNote = {Effect of hydrogen content on the lattice parameter of Ti-6Al-4V alloy has been investigated by X-ray diffraction. The experimental results show that the solution of hydrogen in the Ti-6Al-4V alloy affects significantly on the lattice parameters of {alpha}, {beta} and {delta} phases, especially the {beta} phase. Furthermore, the critical hydrogen content of {delta} hydride formation for Ti-6Al-4V alloy is 0.385 wt.%. When the hydrogen content is lower than the critical hydrogen content, the {delta} hydride cannot precipitate and the lattice parameter ({alpha}) of {beta} phase linearly increases with the increasing of hydrogen content. When the hydrogen content is higher than the critical hydrogen content, the {delta} hydride precipitates and the lattice parameter ({alpha}) of {beta} phase varies inconspicuously with hydrogen content. In addition, the effects of lattice variations and {delta} hydride formation on microstructure are discussed. The {alpha}/{beta} interfaces of lamellar transformed {beta} phase become fuzzy with the increasing of hydrogen content because of the lattice expansion of {beta} phase. Compared with that of the Ti-6Al-4V alloy at low hydrogen content ({<=} 0.385 wt.%), the contrasts of primary {alpha} phase and transformed {beta} phase of Ti-6Al-4V alloy at high hydrogen content ({>=} 0.385 wt.%) were completely reversed due to the formation of {delta} hydride. - Research Highlights: {yields} A novel method for determining {delta} hydride in Ti-6Al-4V alloy is presented. {yields} The critical hydrogen content of {delta} hydride formation is 0.385 wt.%. {yields} The lattice parameter of {beta} phase can be expressed as follows: a=0.323(1+9.9x10{sup -2}C{sub H}) . {yields} Precipitation of {delta} hydride has a significant influence on the microstructure. {yields} The {alpha}/{beta} interfaces of transformed {beta} phase became fuzzy in the hydrogenated alloy.},
doi = {10.1016/J.MATCHAR.2011.04.019},
journal = {Materials Characterization},
issn = {1044-5803},
number = 7,
volume = 62,
place = {United States},
year = {2011},
month = {7}
}