Effect of Inconel 625 on Microstructure and Mechanical Properties of Gas Tungsten Arc Welded Inconel-713LC Superalloy Joints

Abstract:

This study investigates how the use of Inconel filler metal 625 affects the microstructure and mechanical properties of gas tungsten arc welded joints of an IN-713LC nickel-based superalloy. Due to their difference in composition, obvious weld beads could be found by X-ray detection. In addition, it was found that the γ' strengthening phase was absent and carbide was present between the matrix and the weld bead during gas tungsten arc welding. These carbides are strongly related to the formation of cracking and weld shrinkage during solidification. The absence of the γ' strengthening phase and the presence of weld shrinkage and cracking led to a decrease in the hardness, tensile strength, and elongation of the welded pieces.

• Periodical: Advanced Materials Research (Volume 1156)
• Pages: 10-16
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1156.10
• Online since: December 2019
• Authors: Yu Chih Tzeng, Chih Ting Wu*
• Keywords: GTAW, IN-713LC Nickel-Based Superalloy, Inconel Filler Metal 625

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