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Impact of electromagnetic stirring on the gas metal arc welding of an MAR-M247 superalloy

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Abstract

In this paper, the impact of electromagnetic stirring (EMS) on the gas metal arc welding (GTAW) of an MAR-M247 superalloy was investigated. Results revealed that, without electromagnetic stirring, it was easy for carbides in the heat-affected zone (HAZ) of the weld bead to liquefy during welding, leading to weld bead cracks. Electromagnetic stirring refined the grains in the HAZ and the weld bead, leading to grain strengthening and subsequently resulting in the effective improvement in the hardness of the weld bead. In addition, electromagnetic stirring significantly facilitated the formation of the weld bead by the removal of large inclusions which in turn effectively improved crack resistance of the joint. It also accelerated the floating up of gas holes thereby reducing the generation of porosity.

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Authors and Affiliations

  1. Department of Power Vehicle and Systems Engineering, Chung-Cheng Institute of Technology, National Defense University, Taoyuan, 33551, Taiwan

    Tzeng Yu-Chih

  2. Department of Naval Architecture and Ocean Engineering, Nation Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan

    Cheng-Yu Lu

  3. Department of Systems and Naval Mechatronic Engineering, National Cheng-Kung University, Tainan City, 70101, Taiwan

    Ren-Yu Chen

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TYC: conceptualization, methodology, investigation, supervision, funding acquisition, validation, writing—review and editing. LCY: conceptualization, investigation, and validation. All authors equally contributed the overall manuscript. CRY: conceptualization, investigation, methodology, writing—original draft, writing—review and editing.

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Correspondence to Ren-Yu Chen.

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Yu-Chih, T., Lu, CY. & Chen, RY. Impact of electromagnetic stirring on the gas metal arc welding of an MAR-M247 superalloy. Int J Adv Manuf Technol 119, 343–355 (2022). https://doi.org/10.1007/s00170-021-08236-3

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