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Effect of process parameters on mechanical properties of Inconel718 superalloy fabricated by directional energy deposition

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Abstract

Inconel718 maintains excellent mechanical properties at high temperatures of 700 ℃ and has a wide range of applications in aerospace, high-performance turbines, and other fields. However, the use of improper laser process parameters makes the Inconel718 obtained by the directional energy deposition method have poor performance and defects, and there are currently fewer studies on the regulation of the mechanical properties of the preparation of Inconel718 by directed energy deposition. In this paper, the influencing regulation of laser process parameters of laser power, scanning speed, hatch spacing, layer thickness, and forming direction on the microstructure and mechanical properties of Inconel718 prepared by directional energy deposition is investigated by single-factor test method. The mechanical properties of Inconel718 obtained by directional energy deposition and forge are compared. The results show that, among the five laser process parameters, the laser power and forming direction have significant effect on the mechanical properties of Inconel718 obtained by directional energy deposition, while the scanning speed, scanning spacing, and layer thickness have less influence on its mechanical properties. Compared with Inconel718 prepared by ordinary forge, the tensile strength of Inconel718 obtained by directed energy deposition is reduced by 7.64%, the hardness is increased by 23.55%, the impact strength is reduced by 17.6%, and the plasticity is reduced obviously. Good mechanical properties can be reached from the Inconel718 obtained by the directional energy deposition method.

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Funding

This project was supported by the National Natural Science Foundation of China (no. 51875319) and Shandong Natural Science Foundation of China (ZR2020ZD05).

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Authors and Affiliations

  1. Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061, People’s Republic of China

    Tianhao Jia, Bin Zou, Wenbo Liu, Ting Lei & Hongjian Ding

  2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Ministry of Education, Jinan, People’s Republic of China

    Tianhao Jia, Bin Zou, Wenbo Liu, Ting Lei & Hongjian Ding

  3. National Demonstration Center for Experimental Mechanical Engineering Education (Shandong University), 17923 Jing Shi Road, Jinan, 250061, People’s Republic of China

    Tianhao Jia, Bin Zou, Wenbo Liu, Ting Lei & Hongjian Ding

Authors
  1. Tianhao Jia
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  2. Bin Zou
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  3. Wenbo Liu
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  4. Ting Lei
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  5. Hongjian Ding
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Contributions

Tianhao Jia (first author): conceptualization, methodology, validation, formal analysis, investigation, and writing the original draft. Bin Zou (corresponding author): conceptualization, formal analysis, resources, and writing—review and editing. Wenbo Liu and Ting: formal analysis. The author’s contribution corresponds to their order. All authors read and approved the final manuscript.

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Correspondence to Bin Zou.

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No conflict of interest exists in the submission of this manuscript, and the manuscript is approved by all authors for publication. This study does not involve human participants and/or animal studies. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously and not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed.

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Jia, T., Zou, B., Liu, W. et al. Effect of process parameters on mechanical properties of Inconel718 superalloy fabricated by directional energy deposition. Int J Adv Manuf Technol 128, 2863–2883 (2023). https://doi.org/10.1007/s00170-023-10854-y

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  • DOI: https://doi.org/10.1007/s00170-023-10854-y

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