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Effect of Deposition Strategy on Geometric Stability in Wire Arc Additive Manufacturing of Inconel 625

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Abstract:

Wire Arc Additive Manufacturing (WAAM) is a promising technology for producing large, high-performance metallic components, though process stability and geometric control remain critical challenges. The present work investigates the influence of deposition trajectory on the geometry, surface quality, and microhardness of wire arc additive manufactured Inconel 625 walls, produced by a Cold Metal Transfer (CMT) process. A conventional linear double-pass strategy is directly compared with a single-pass triangular weave trajectory under equivalent heat input per unit length, in order to isolate the effect of the torch path from other process variables. Single-layer and multi-layer walls were fabricated and characterized in terms of geometry, dimensional stability, surface waviness, and Vickers microhardness. The results show that the weave trajectory leads to improved geometric consistency, reduced variability, and significantly lower surface waviness compared to the linear strategy, while maintaining comparable mean wall width and microhardness. These findings demonstrate that appropriate trajectory design can enhance geometric stability and near-net-shape capability in WAAM-CMT without altering thermal input or material properties.

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Info:

Periodical:

Key Engineering Materials (Volume 1047)

Pages:

183-190

Online since:

April 2026

Authors:

Eleonora Viola*, Alessia Teresa Silvestri, Antonino Squillace

Keywords:

Cold Metal Transfer (CMT), Deposition Strategy, Inconel 625, Wire Arc Additive Manufacturing (WAAM)

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RIS, BibTeX

Permissions:

Creative Commons CC BY 4.0

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* - Corresponding Author

References

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