Microstructure and Mechanical Properties of Laser Remanufactured Ti2AlC Modified Inconel 718 Alloy

doi:10.3901/JME.2025.12.153

Abstract

Abstract: On-site laser remanufacturing of damaged Inconel 718 components presents significant economic benefits. However, the use of commercial Inconel 718 alloy powder for laser repair results in notable mechanical property disparities between the substrate and the repaired region. Modifying the composition is an effective approach to address this issue. Laser repair experiments were conducted on damaged Inconel 718 alloy substrates using composite powder containing Ti₂AlC, focusing on comparing the mechanical properties of repaired specimens under different beam diameter configurations. The results indicate that adding 10 vol.% Ti₂AlC suppresses the formation of detrimental Laves phase during non-equilibrium solidification of Inconel 718 while promoting the formation of carbides and strengthening phase γ'. Under the configuration of a 3 mm beam diameter, the addition of Ti₂AlC increases yield strength, tensile strength, and hardness by 17.0%, 11.1%, and 46.3% respectively compared to the non-additive case. When further reducing the beam diameter to 0.8 mm, yield strength, tensile strength, and hardness increase by 80.0%, 72.6%, and 59.2% respectively. The proposed method of utilizing Ti₂AlC-modified Inconel 718 alloy provides a new solution for the high-quality repair of damaged Inconel 718 components.

Key words: laser remanufacturing, Inconel 718, Ti₂AlC, compositional modification, mechanical properties

CLC Number:

TG146

KONG Yu, PENG Kaiyuan, HUANG Haihong. Microstructure and Mechanical Properties of Laser Remanufactured Ti₂AlC Modified Inconel 718 Alloy[J]. Journal of Mechanical Engineering, 2025, 61(12): 153-163.

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Microstructure and Mechanical Properties of Laser Remanufactured Ti₂AlC Modified Inconel 718 Alloy

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