Title: Study on the influence of the dendritic microstructure on the turning of Wire and Arc Additive Manufacturing Inconel 718

Authors: Gustavo Quadra Vieira dos Santos; Youhei Kujirai; Jun'ichi Kaneko; Takeyuki Abe

Addresses: Graduate School of Science and Engineering, Saitama University, 338-8570, 255 Shimookubo, Sakura-ku, Saitama-shi, Japan ' Graduate School of Science and Engineering, Saitama University, 338-8570, 255 Shimookubo, Sakura-ku, Saitama-shi, Japan ' Graduate School of Science and Engineering, Saitama University, 338-8570, 255 Shimookubo, Sakura-ku, Saitama-shi, Japan ' Graduate School of Science and Engineering, Saitama University, 338-8570, 255 Shimookubo, Sakura-ku, Saitama-shi, Japan

Abstract: In this research, the machinability of Wire and Arc Additive Manufacturing (WAAM) Inconel 718 is investigated. This evaluation is performed by comparing the turning process of the WAAM Inconel 718 and AMS5662 samples. Aiming to understand if there are changes in the machinability between those materials, data of cutting forces, surface roughness, and tool wear were compared. For the sample preparation, both types of materials were cut into round samples to be machined. After realising that the results for machining differ between samples, the focus was given to understanding the reason behind those differences, especially for the cutting forces. The peculiar microstructure of the WAAM Inconel 718, composed of columnar dendrites as opposed to the equiaxial grains from the AMS5662, was presented as the main reason for the differences in the results, linking the instabilities of the cutting forces with the machining of the dendritic microstructure.

Keywords: additive manufacturing; machining; turning; cutting forces; microstructure; wear; surface quality.

DOI: 10.1504/IJAT.2024.140962

International Journal of Abrasive Technology, 2024 Vol.12 No.3, pp.203 - 220

Published online: 04 Sep 2024 *

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