@article{LUO2026, 
author = {Qian LUO and Jiabin ZUO and Zhiyu SUN and Haitao HU and Xianfei DING and Hai NAN and Zhijun JI},
title = {Effect of hot isostatic pressing process on microstructure and tensile properties of as-cast Ti-24Al-15Nb-1Mo alloy},
year = {2026},
journal = {Journal of Aeronautical Materials},
volume = {46},
number = {10},
pages = {107-115},
keywords = {Ti-24Al-15Nb-1Mo alloy, hot isostatic pressing, casting defect, microstructure, room-temperature plasticity},
url = {https://www.sciopen.com/article/10.11868/j.issn.1005-5053.2026.000075},
doi = {10.11868/j.issn.1005-5053.2026.000075},
abstract = {To address the internal defects and low room-temperature ductility of cast Ti-24Al-15Nb-1Mo alloy, the effects of hot isostatic pressing (HIP) process parameters (temperature, pressure, and holding time) on its microstructure and room-temperature ductility are investigated. An orthogonal experimental design is adopted. The alloy specimens melted and cast in a vacuum consumable skull furnace are subjected to HIP treatment with different process parameters. X-ray transmission is used to characterize the closure of porosity. Combined with scanning electron microscopy and X-ray diffraction, the phase constitution and distribution are analyzed, and room-temperature tensile property tests are carried out. The results show that under HIP treatments with different process parameters, casting defects including porosity and shrinkage cavities below ϕ1-4 mm in the as-cast Ti-24Al-15Nb-1Mo alloy are completely eliminated. Range analysis indicates that temperature exerts the most significant effect on the room-temperature ductility of the alloy, followed by pressure, while holding time has the weakest effect. After HIP treatment at 1000 ℃ under 130 MPa for 2 h, the room-temperature tensile strength of the alloy increases to 887 MPa, which is 15% higher than that of the as-cast alloy; the elongation rises to 2.95%, 4.9 times that of the as-cast alloy. Therefore, HIP markedly improves the room-temperature ductility of the alloy via defect healing and synergistic microstructure optimization.}
}