Journal of Materials Engineering

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Microstructure evolution behavior of gradient composition alloy between TC25G and TiAl4822 prepared by laser rapid melting

Yang WANG, Xianzhe RAN, Lei SU, Dezhibo KONG, Xu CHENG, Zhuo LI, Dong LIU

Journal of Materials Engineering, 2025, 53(3): 95-104. DOI: 10.11868/j.issn.1001-4381.2023.000291

Fig.7 Schematic diagrams of solidification structure formation of laser melting （1-x）TC25G-xTiAl4822 alloy （a）90%TC25G-10%TiAl4822；（b）70%TC25G-30%TiAl4822；（c）50%TC25G-50%TiAl4822；（d）30%TC25G-70%TiAl4822；（e）10%TC25G-90%TiAl4822

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Table 1 Element content of rotating electrode atomized titanium based pre-alloyed powder （mass fraction/%）
Table 2 Alloy ingot composition and number （mass fraction/%）
Fig.1 Schematic diagram of laser rapid melting（a） and macroscopic morphologies of 11 groups of mixed powder laser rapid melting alloy ingots（b）
Fig.2 Macrostructures of laser melting TC25G-TiAl4822 gradient composition alloy ingots
Fig.3 XRD patterns of laser melting TC25G-TiAl4822 gradient composition alloy ingots（a）0^#-5^#；（b）6^#-10^#
Fig.4 SEM images of laser melting TC25G-TiAl4822 gradient composition alloy
Fig.5 TEM morphologies of laser melting TC25G-TiAl4822 gradient composition alloy
Table 3 EDX results of the white and gray phases
Fig.6 Vickers hardness change of laser melting TC25G-TiAl4822 gradient composition alloy

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