Microstructure Evolution of High Nb-TiAl Alloys with Different Al Contents under Low-Temperature with Stress

Yiyuan Chang; Shulin Dong; Yingdong Qu; Ruirun Chen; Guanglong Li; Shibing Liu

doi:10.1007/s11665-026-13444-7

Microstructure Evolution of High Nb-TiAl Alloys with Different Al Contents under Low-Temperature with Stress

Yiyuan Chang
, Shulin Dong^*
, Yingdong Qu
, Ruirun Chen
, Guanglong Li
, Shibing Liu^*

^*Corresponding author for this work

Shenyang University of Technology
Shenyang Aerospace University
Harbin Institute of Technology
Shenyang Research Institute of Foundry

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

1 Scopus citations

Abstract

In this study, the microstructure evolution of high Nb-TiAl based alloys with low Al (Ti-44Al-8Nb-0.1B), medium Al (Ti-47Al-8Nb-0.1B) and high Al (Ti-50Al-8Nb-0.1) under low-temperature heat treatment and low-temperature stress heat treatment is studied by changing the percentage of Al in high Nb-TiAl based alloys. The detailed research results show that during the heat treatment process of high Nb-TiAl, the proportion of γ phase in the alloy increases with the increase of the percentage of Al. Compared with Ti-44Al-8Nb-0.1B and Ti-50Al-8Nb-0.1B alloys, Ti-47Al-8Nb-0.1B alloy is easier to obtain (α₂ + γ) lamellar structure. In addition, compared with the stress-free low-temperature heat treatment, another variant needle-like γ phase of γ phase is found under the condition of low-temperature stress heat treatment.

Original language	English
Journal	Journal of Materials Engineering and Performance
DOIs	https://doi.org/10.1007/s11665-026-13444-7
State	Accepted/In press - 2026
Externally published	Yes

Keywords

Al content
TiAl
heat treatment
needle-like γ
stress

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10.1007/s11665-026-13444-7

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@article{826e0d30215d4bacb0581aa825cffcc8,

title = "Microstructure Evolution of High Nb-TiAl Alloys with Different Al Contents under Low-Temperature with Stress",

abstract = "In this study, the microstructure evolution of high Nb-TiAl based alloys with low Al (Ti-44Al-8Nb-0.1B), medium Al (Ti-47Al-8Nb-0.1B) and high Al (Ti-50Al-8Nb-0.1) under low-temperature heat treatment and low-temperature stress heat treatment is studied by changing the percentage of Al in high Nb-TiAl based alloys. The detailed research results show that during the heat treatment process of high Nb-TiAl, the proportion of γ phase in the alloy increases with the increase of the percentage of Al. Compared with Ti-44Al-8Nb-0.1B and Ti-50Al-8Nb-0.1B alloys, Ti-47Al-8Nb-0.1B alloy is easier to obtain (α2 + γ) lamellar structure. In addition, compared with the stress-free low-temperature heat treatment, another variant needle-like γ phase of γ phase is found under the condition of low-temperature stress heat treatment.",

keywords = "Al content, TiAl, heat treatment, needle-like γ, stress",

author = "Yiyuan Chang and Shulin Dong and Yingdong Qu and Ruirun Chen and Guanglong Li and Shibing Liu",

note = "Publisher Copyright: {\textcopyright} ASM International 2026.",

year = "2026",

doi = "10.1007/s11665-026-13444-7",

language = "英语",

journal = "Journal of Materials Engineering and Performance",

issn = "1059-9495",

publisher = "Springer New York",

}

TY - JOUR

T1 - Microstructure Evolution of High Nb-TiAl Alloys with Different Al Contents under Low-Temperature with Stress

AU - Chang, Yiyuan

AU - Dong, Shulin

AU - Qu, Yingdong

AU - Chen, Ruirun

AU - Li, Guanglong

AU - Liu, Shibing

N1 - Publisher Copyright: © ASM International 2026.

PY - 2026

Y1 - 2026

N2 - In this study, the microstructure evolution of high Nb-TiAl based alloys with low Al (Ti-44Al-8Nb-0.1B), medium Al (Ti-47Al-8Nb-0.1B) and high Al (Ti-50Al-8Nb-0.1) under low-temperature heat treatment and low-temperature stress heat treatment is studied by changing the percentage of Al in high Nb-TiAl based alloys. The detailed research results show that during the heat treatment process of high Nb-TiAl, the proportion of γ phase in the alloy increases with the increase of the percentage of Al. Compared with Ti-44Al-8Nb-0.1B and Ti-50Al-8Nb-0.1B alloys, Ti-47Al-8Nb-0.1B alloy is easier to obtain (α2 + γ) lamellar structure. In addition, compared with the stress-free low-temperature heat treatment, another variant needle-like γ phase of γ phase is found under the condition of low-temperature stress heat treatment.

AB - In this study, the microstructure evolution of high Nb-TiAl based alloys with low Al (Ti-44Al-8Nb-0.1B), medium Al (Ti-47Al-8Nb-0.1B) and high Al (Ti-50Al-8Nb-0.1) under low-temperature heat treatment and low-temperature stress heat treatment is studied by changing the percentage of Al in high Nb-TiAl based alloys. The detailed research results show that during the heat treatment process of high Nb-TiAl, the proportion of γ phase in the alloy increases with the increase of the percentage of Al. Compared with Ti-44Al-8Nb-0.1B and Ti-50Al-8Nb-0.1B alloys, Ti-47Al-8Nb-0.1B alloy is easier to obtain (α2 + γ) lamellar structure. In addition, compared with the stress-free low-temperature heat treatment, another variant needle-like γ phase of γ phase is found under the condition of low-temperature stress heat treatment.

KW - Al content

KW - TiAl

KW - heat treatment

KW - needle-like γ

KW - stress

UR - https://www.scopus.com/pages/publications/105030699102

U2 - 10.1007/s11665-026-13444-7

DO - 10.1007/s11665-026-13444-7

M3 - 文章

AN - SCOPUS:105030699102

SN - 1059-9495

JO - Journal of Materials Engineering and Performance

JF - Journal of Materials Engineering and Performance

ER -

Microstructure Evolution of High Nb-TiAl Alloys with Different Al Contents under Low-Temperature with Stress

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Keywords

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