Effect of heat treatment on the microstructure and mechanical properties of Ti<sub>2</sub>AlNb alloys

MU Yiqiang; XU Rui; CHENG Chao; YU shuai; LIU yujing; XU Qinsi; ZHAO Zibo

doi:10.7513/j.issn.1004-7638.2026.04.005

Volume 47 Issue 4

Aug. 2026

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MU Yiqiang, XU Rui, CHENG Chao, YU shuai, LIU yujing, XU Qinsi, ZHAO Zibo. Effect of heat treatment on the microstructure and mechanical properties of Ti2AlNb alloys[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 43-50, 65. doi: 10.7513/j.issn.1004-7638.2026.04.005

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MU Yiqiang, XU Rui, CHENG Chao, YU shuai, LIU yujing, XU Qinsi, ZHAO Zibo. Effect of heat treatment on the microstructure and mechanical properties of Ti₂AlNb alloys[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 43-50, 65. doi: 10.7513/j.issn.1004-7638.2026.04.005

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Effect of heat treatment on the microstructure and mechanical properties of Ti₂AlNb alloys

doi: 10.7513/j.issn.1004-7638.2026.04.005

MU Yiqiang^{1, 2
,},
XU Rui¹,
CHENG Chao^{3
,
,},
YU shuai^{2, 4},
LIU yujing³,
XU Qinsi¹,
ZHAO Zibo^{3, 5}

1.
Civil Aviation College, Shenyang Aerospace University, Shenyang 110136, Liaoning, China
2.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
3.
Yuhua Institute of Advanced Materials, Baoji Xigong Ti Alloy Products Co., Ltd., Baoji 721300, Shaanxi, China
4.
University of Science and Technology of China, School of Materials Science and Engineering, Shenyang 110016, Liaoning, China
5.
Qinchuangyuan (Baoji) Institute of Industrial Innovation Co., Ltd., Baoji 721000, Shaanxi China

More Information

Received Date: 2026-01-29
Accepted Date: 2026-03-09
Rev Recd Date: 2026-02-26
Publish Date: 2026-08-31

Abstract

Abstract

This study proposed a duplex solution and aging heat treatment strategy. The volume fraction of the α₂ phase was tailored by controlling the primary solution-treatment temperature, while localized recrystallization was simultaneously suppressed. The secondary solution treatment promoted the precipitation of coarse lamellar O phase along subgrain boundaries, thereby improving the plastic deformability of the alloy. Subsequent aging induced a high density of fine acicular O-phase precipitates, which further enhanced the alloy strength. Through this heat-treatment route, a trimodal microstructure consisting of equiaxed α₂ grains and dual-scale lamellar O phases was obtained. The treated alloy exhibited a room-temperature elongation of 7.5% and a tensile strength of 837 MPa at 750 ℃, demonstrating a synergistic improvement in strength and ductility.
- Ti₂AlNb alloy,
- heat treatment,
- microstructure,
- mechanical properties

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References(21)

References

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