Optimization of Weld Parameters in Wire and Arc-Based Directed Energy Deposition of High Strength Low Alloy Steels

Van Thao Le; Dinh Si Mai; Van Thuc Dang; Duc Manh Dinh; Thi Hong Cao; Van Anh Nguyen

doi:10.46604/aiti.2023.10658

Authors

Van Thao Le Advanced Technology Center, Le Quy Don Technical University, Hanoi, Vietnam
Dinh Si Mai Advanced Technology Center, Le Quy Don Technical University, Hanoi, Vietnam
Van Thuc Dang Advanced Technology Center, Le Quy Don Technical University, Hanoi, Vietnam
Duc Manh Dinh Advanced Technology Center, Le Quy Don Technical University, Hanoi, Vietnam
Thi Hong Cao Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
Van Anh Nguyen Welding Engineering and Laser Processing Centre, Cranfield University, Bedford, UK

DOI:

https://doi.org/10.46604/aiti.2023.10658

Keywords:

WADED, HSLA steel, weld bead, optimal variables

Abstract

This paper aims to investigate the fabrication of high strength low alloy (HSLA) steels by wire and arc-based directed energy deposition (WADED). Firstly, the relationship between the process variables (including the travel speed-V, the current-C, and the voltage-U) and the geometrical characteristics of weld beads (including the bead height (BH), bead width (BW), and melting pool length (MPL)) was investigated. Secondly, the optimal process variables were identified using the desirability approach. The results indicate that voltage-U has the highest impact on BW and MPL, meanwhile the travel speed-V is the most impacting factor on BH. The optimal variables for the WADED process of HSAL steels are V = 0.3 m/min, C = 160 A, and U = 19 V. The component fabricated with the optimal variables is fully dense without spatters and defects, confirming the efficiency of the WADED process for HSLA steels.

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