Research progress on preparation methods and hot forming of TiAl alloy ingots

ZHANG Zhaoqun; TIAN Jing; ZHOU Feng; WANG Xin; CHEN Yuyong; JIANG Sida

doi:10.7513/j.issn.1004-7638.2026.04.002

Volume 47 Issue 4

Aug. 2026

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ZHANG Zhaoqun, TIAN Jing, ZHOU Feng, WANG Xin, CHEN Yuyong, JIANG Sida. Research progress on preparation methods and hot forming of TiAl alloy ingots[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 9-20, 42. doi: 10.7513/j.issn.1004-7638.2026.04.002

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ZHANG Zhaoqun, TIAN Jing, ZHOU Feng, WANG Xin, CHEN Yuyong, JIANG Sida. Research progress on preparation methods and hot forming of TiAl alloy ingots[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(4): 9-20, 42. doi: 10.7513/j.issn.1004-7638.2026.04.002

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Research progress on preparation methods and hot forming of TiAl alloy ingots

doi: 10.7513/j.issn.1004-7638.2026.04.002

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

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Received Date: 2026-03-10
Accepted Date: 2026-04-08
Rev Recd Date: 2026-04-08
Publish Date: 2026-08-31

Abstract

Abstract

TiAl alloys feature low density and high specific strength in the 600-900 ℃ temperature range and have been implemented in aero-engine components such as low pressure turbine blades. However, restricted by factors such as lacked room temperature ductility, a narrow hot working window, and strong sensitivity to solidification segregation and defects, the stable production of large scale ingots remains a key bottleneck for wider engineering application. This paper reviews the evolution of composition design in TiAl alloy systems and compares the characteristics, advantages, and limitations of typical ingot preparation routes including vacuum arc remelting, induction skull melting, vacuum induction melting, and plasma arc melting. Emphasis is placed on composition uniformity, inclusion and defect control at large ingot sizes, as well as the role of hybrid melting routes in improving quality stability. In addition, the critical roles of subsequent thermomechanical processing such as forging, extrusion, and rolling in densification, microstructure refinement, and property enhancement are summarized, providing references for process optimization and scalable manufacturing of large TiAl ingots.
- TiAl alloy,
- ingot preparation,
- hot working

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References(69)

References

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