A novel method to modify the microstructure and mechanical properties of direct energy deposited α + β titanium alloy

Jingwei Yuan; Xu Cheng; Fang Cheng; Zhuo Li; Shijie Qi

doi:10.1016/j.matlet.2023.135237

A novel method to modify the microstructure and mechanical properties of direct energy deposited α + β titanium alloy

Jingwei Yuan
, Xu Cheng
, Fang Cheng
, Zhuo Li^*
, Shijie Qi

^*Corresponding author for this work

School of Materials Science and Engineering

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

3 Scopus citations

Abstract

This study employs multiple subcritical β/α transformation temperature annealing (MSA) heat treatments in order to eliminate the detrimental effects of continuous grain boundaries α phase (α_GB) and the grain boundary Widmanstätten α phase (α_WGB) on the mechanical properties of Ti-6.0Al-2.5Nb-2.2Zr-1.2Mo alloy fabricated through direct energy deposition (DED) technique. The width of the α lath increase with the increase in the number of heat treatments, while the aspect ratio decreases. The α_GBs start to discontinue after once heat treatment and fully disappear after three times heat treatment. At this point, α_WGB discontinued. After six times heat treatment, the strength and plasticity of Ti-6321 alloy were improved. This method effectively enhances the comprehensive mechanical properties of dual-phase titanium alloys.

Original language	English
Article number	135237
Journal	Materials Letters
Volume	353
DOIs	https://doi.org/10.1016/j.matlet.2023.135237
State	Published - 15 Dec 2023

Keywords

Additive manufacturing
Metals and alloys
Microstructure

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10.1016/j.matlet.2023.135237

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@article{d9740e198e2b4d989ee2bf4f6fca348f,

title = "A novel method to modify the microstructure and mechanical properties of direct energy deposited α + β titanium alloy",

abstract = "This study employs multiple subcritical β/α transformation temperature annealing (MSA) heat treatments in order to eliminate the detrimental effects of continuous grain boundaries α phase (αGB) and the grain boundary Widmanst{\"a}tten α phase (αWGB) on the mechanical properties of Ti-6.0Al-2.5Nb-2.2Zr-1.2Mo alloy fabricated through direct energy deposition (DED) technique. The width of the α lath increase with the increase in the number of heat treatments, while the aspect ratio decreases. The αGBs start to discontinue after once heat treatment and fully disappear after three times heat treatment. At this point, αWGB discontinued. After six times heat treatment, the strength and plasticity of Ti-6321 alloy were improved. This method effectively enhances the comprehensive mechanical properties of dual-phase titanium alloys.",

keywords = "Additive manufacturing, Metals and alloys, Microstructure",

author = "Jingwei Yuan and Xu Cheng and Fang Cheng and Zhuo Li and Shijie Qi",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2023.135237",

language = "英语",

volume = "353",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A novel method to modify the microstructure and mechanical properties of direct energy deposited α + β titanium alloy

AU - Yuan, Jingwei

AU - Cheng, Xu

AU - Cheng, Fang

AU - Li, Zhuo

AU - Qi, Shijie

PY - 2023/12/15

Y1 - 2023/12/15

N2 - This study employs multiple subcritical β/α transformation temperature annealing (MSA) heat treatments in order to eliminate the detrimental effects of continuous grain boundaries α phase (αGB) and the grain boundary Widmanstätten α phase (αWGB) on the mechanical properties of Ti-6.0Al-2.5Nb-2.2Zr-1.2Mo alloy fabricated through direct energy deposition (DED) technique. The width of the α lath increase with the increase in the number of heat treatments, while the aspect ratio decreases. The αGBs start to discontinue after once heat treatment and fully disappear after three times heat treatment. At this point, αWGB discontinued. After six times heat treatment, the strength and plasticity of Ti-6321 alloy were improved. This method effectively enhances the comprehensive mechanical properties of dual-phase titanium alloys.

AB - This study employs multiple subcritical β/α transformation temperature annealing (MSA) heat treatments in order to eliminate the detrimental effects of continuous grain boundaries α phase (αGB) and the grain boundary Widmanstätten α phase (αWGB) on the mechanical properties of Ti-6.0Al-2.5Nb-2.2Zr-1.2Mo alloy fabricated through direct energy deposition (DED) technique. The width of the α lath increase with the increase in the number of heat treatments, while the aspect ratio decreases. The αGBs start to discontinue after once heat treatment and fully disappear after three times heat treatment. At this point, αWGB discontinued. After six times heat treatment, the strength and plasticity of Ti-6321 alloy were improved. This method effectively enhances the comprehensive mechanical properties of dual-phase titanium alloys.

KW - Additive manufacturing

KW - Metals and alloys

KW - Microstructure

UR - https://www.scopus.com/pages/publications/85172860989

U2 - 10.1016/j.matlet.2023.135237

DO - 10.1016/j.matlet.2023.135237

M3 - 文章

AN - SCOPUS:85172860989

SN - 0167-577X

VL - 353

JO - Materials Letters

JF - Materials Letters

M1 - 135237

ER -

A novel method to modify the microstructure and mechanical properties of direct energy deposited α + β titanium alloy

Abstract

Keywords

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