Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment

Hanlei Zhang; Hongchao Kou; Jieren Yang; Dong Huang; Hai Nan; Jinshan Li

doi:10.1016/j.msea.2014.09.104

Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment

Hanlei Zhang
, Hongchao Kou
, Jieren Yang
, Dong Huang
, Hai Nan
, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Beijing Institute of Aeronautical Materials

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed β_H. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation β_H→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30% higher than that of the as-cast alloy.

Original language	English
Pages (from-to)	274-280
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	619
DOIs	https://doi.org/10.1016/j.msea.2014.09.104
State	Published - 1 Dec 2014

Keywords

Hydrogen
Mechanical characterization
Microstructure
Phase transformation
Recrystallization
Titanium alloys

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10.1016/j.msea.2014.09.104

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@article{0ac960d2940541e58911270bdf44b13c,

title = "Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment",

abstract = "In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed βH. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation βH→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30\% higher than that of the as-cast alloy.",

keywords = "Hydrogen, Mechanical characterization, Microstructure, Phase transformation, Recrystallization, Titanium alloys",

author = "Hanlei Zhang and Hongchao Kou and Jieren Yang and Dong Huang and Hai Nan and Jinshan Li",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

month = dec,

day = "1",

doi = "10.1016/j.msea.2014.09.104",

language = "英语",

volume = "619",

pages = "274--280",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

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TY - JOUR

T1 - Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment

AU - Zhang, Hanlei

AU - Kou, Hongchao

AU - Yang, Jieren

AU - Huang, Dong

AU - Nan, Hai

AU - Li, Jinshan

PY - 2014/12/1

Y1 - 2014/12/1

N2 - In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed βH. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation βH→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30% higher than that of the as-cast alloy.

AB - In the current work, Ti-6.5Al-2Zr-Mo-V alloy is processed with hydrogenation, solution-aging and dehydrogenation, that is, thermo hydrogen treatment (THT). Microstructure evolution and phase transformation during THT are investigated. Results show that after aging the microstructure consists of primary α needle, fine acicular eutectoid product and undecomposed βH. At the end of dehydrogenation, the microstructure is composed of fine, fragmented β pieces. Recrystal α grain also occurs in some of the dehydrogenated samples. The fragmented β pieces form by phase transformation βH→α+β+H ↑, and the recrystallization occurs via δ→α+H ↑. Tensile results show that the strength of Ti-6.5Al-2Zr-Mo-V alloy after THT increases remarkably, which is about 30% higher than that of the as-cast alloy.

KW - Hydrogen

KW - Mechanical characterization

KW - Microstructure

KW - Phase transformation

KW - Recrystallization

KW - Titanium alloys

UR - https://www.scopus.com/pages/publications/84908395638

U2 - 10.1016/j.msea.2014.09.104

DO - 10.1016/j.msea.2014.09.104

M3 - 文章

AN - SCOPUS:84908395638

SN - 0921-5093

VL - 619

SP - 274

EP - 280

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Microstructure evolution and tensile properties of Ti-6.5Al-2Zr-Mo-V alloy processed with thermo hydrogen treatment

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Keywords

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