Effects of cryogenic treatments on phase transformations, microstructure and mechanical properties of near βTi alloy

Bo Song; Wenlong Xiao; Junshuai Wang; Chaoli Ma; Lian Zhou

doi:10.1016/j.jallcom.2021.160495

Effects of cryogenic treatments on phase transformations, microstructure and mechanical properties of near βTi alloy

Bo Song, Wenlong Xiao, Junshuai Wang, Chaoli Ma, Lian Zhou

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

18 Scopus citations

Abstract

The influences of cryogenic treatments, i.e. liquid nitrogen quenching (LNQ) and water quenching followed with liquid nitrogen immersion (WQ-L) on phase transformations, microstructural development and mechanical properties during aging treatment have been studied in near βTi-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy. The results showed that cryogenic treatments produced more O′ and ω-embryos in comparison with water quenching (WQ). After aging treatment, the LNQ sample and WQ-L sample formed finer and higher number density of α precipitates within β grains, which is attributed to the increase of O′ domains provides more potent nucleation sites for α. Tensile tests indicated that the cryogenic treatments improved tensile strength without trading-off ductility obviously. The ultimate tensile strength of aged LNQ and WQ-L sample was increased by 142 MPa and 62 MPa, respectively.

Original language	English
Article number	160495
Journal	Journal of Alloys and Compounds
Volume	879
DOIs	https://doi.org/10.1016/j.jallcom.2021.160495
State	Published - 25 Oct 2021
Externally published	Yes

Keywords

Cryogenic treatment
Mechanical properties
Microstructures
Phase transformations
Titanium alloy

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10.1016/j.jallcom.2021.160495

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title = "Effects of cryogenic treatments on phase transformations, microstructure and mechanical properties of near βTi alloy",

abstract = "The influences of cryogenic treatments, i.e. liquid nitrogen quenching (LNQ) and water quenching followed with liquid nitrogen immersion (WQ-L) on phase transformations, microstructural development and mechanical properties during aging treatment have been studied in near βTi-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy. The results showed that cryogenic treatments produced more O′ and ω-embryos in comparison with water quenching (WQ). After aging treatment, the LNQ sample and WQ-L sample formed finer and higher number density of α precipitates within β grains, which is attributed to the increase of O′ domains provides more potent nucleation sites for α. Tensile tests indicated that the cryogenic treatments improved tensile strength without trading-off ductility obviously. The ultimate tensile strength of aged LNQ and WQ-L sample was increased by 142 MPa and 62 MPa, respectively.",

keywords = "Cryogenic treatment, Mechanical properties, Microstructures, Phase transformations, Titanium alloy",

author = "Bo Song and Wenlong Xiao and Junshuai Wang and Chaoli Ma and Lian Zhou",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = oct,

day = "25",

doi = "10.1016/j.jallcom.2021.160495",

language = "英语",

volume = "879",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effects of cryogenic treatments on phase transformations, microstructure and mechanical properties of near βTi alloy

AU - Song, Bo

AU - Xiao, Wenlong

AU - Wang, Junshuai

AU - Ma, Chaoli

AU - Zhou, Lian

PY - 2021/10/25

Y1 - 2021/10/25

N2 - The influences of cryogenic treatments, i.e. liquid nitrogen quenching (LNQ) and water quenching followed with liquid nitrogen immersion (WQ-L) on phase transformations, microstructural development and mechanical properties during aging treatment have been studied in near βTi-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy. The results showed that cryogenic treatments produced more O′ and ω-embryos in comparison with water quenching (WQ). After aging treatment, the LNQ sample and WQ-L sample formed finer and higher number density of α precipitates within β grains, which is attributed to the increase of O′ domains provides more potent nucleation sites for α. Tensile tests indicated that the cryogenic treatments improved tensile strength without trading-off ductility obviously. The ultimate tensile strength of aged LNQ and WQ-L sample was increased by 142 MPa and 62 MPa, respectively.

AB - The influences of cryogenic treatments, i.e. liquid nitrogen quenching (LNQ) and water quenching followed with liquid nitrogen immersion (WQ-L) on phase transformations, microstructural development and mechanical properties during aging treatment have been studied in near βTi-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy. The results showed that cryogenic treatments produced more O′ and ω-embryos in comparison with water quenching (WQ). After aging treatment, the LNQ sample and WQ-L sample formed finer and higher number density of α precipitates within β grains, which is attributed to the increase of O′ domains provides more potent nucleation sites for α. Tensile tests indicated that the cryogenic treatments improved tensile strength without trading-off ductility obviously. The ultimate tensile strength of aged LNQ and WQ-L sample was increased by 142 MPa and 62 MPa, respectively.

KW - Cryogenic treatment

KW - Mechanical properties

KW - Microstructures

KW - Phase transformations

KW - Titanium alloy

UR - http://www.scopus.com/inward/record.url?scp=85106556996&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2021.160495

DO - 10.1016/j.jallcom.2021.160495

M3 - 文章

AN - SCOPUS:85106556996

SN - 0925-8388

VL - 879

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 160495

ER -

Effects of cryogenic treatments on phase transformations, microstructure and mechanical properties of near βTi alloy

Abstract

Keywords

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