Homogenization behavior of IN 718 superalloy prepared by electron beam layered solidification technology

Longhai Zhao; Yi Tan; Yilin Wang; Xiaogang You; Kai Chang; Xinpeng Zhuang; Pengting Li; Yebing Hu

Journal of Materials Research and Technology (Jul 2021)

Homogenization behavior of IN 718 superalloy prepared by electron beam layered solidification technology

Longhai Zhao,
Yi Tan,
Yilin Wang,
Xiaogang You,
Kai Chang,
Xinpeng Zhuang,
Pengting Li,
Yebing Hu

Affiliations

Longhai Zhao: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Yi Tan: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China; Corresponding author.
Yilin Wang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Xiaogang You: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Kai Chang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Xinpeng Zhuang: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Pengting Li: Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian, 116023, China
Yebing Hu: Engineering Training Center of Dalian University of Technology, Dalian, 116024, China

Journal volume & issue: Vol. 13
pp. 1567 – 1575

Abstract

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The homogenization behavior of IN 718 superalloy prepared by electron beam layered solidification has been investigated at 1150 °C. The set temperature was accurately corrected as 1149 °C by a compound method. The effect of homogenization treatment on the microstructure and microsegregation evolution was discussed by two models. A further discussion about Nb diffusion was conducted. The results show that the microsegregation was eliminated after the ingot was homogenized for 8 h at 1150 °C. Meanwhile, DNb and DTi is calculated approximately as 3.8 × 10−11 cm2/s and 4.0 × 10−11 cm2/s, respectively. The completion time of homogenization at a certain temperature depends on the degree of segregation, the distance between the secondary dendrite arms and the content of Nb. Additionally, it seems like that the DNb in IN 718 alloy decreases with the decrease of its concentration at the same temperature.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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