Characterization of Surface Integrity in Post-processed Ti-5Al-5Mo-5V-3Cr Parts Fabricated via Laser Powder Bed Fusion

Publication Date

1-1-2025

Document Type

Conference Proceeding

Publication Title

Minerals Metals and Materials Series

DOI

10.1007/978-3-031-80748-0_129

First Page

1461

Last Page

1471

Abstract

The Ti-5Al-5Mo-5V-3Cr alloy (Ti-5553) is a near-β titanium alloy known for its remarkable combination of strength, toughness, and lightweight properties, making it an ideal choice for producing intricate structural components via additive manufacturing (AM) techniques. Despite the advantages of AM, post-machining, such as drilling, is required to achieve tight tolerances and smooth surface finishes in critical parts like load-bearing fuselage components and landing gear in aircraft. However, the unique machinability characteristics of AM-produced parts pose challenges in the manufacturing process. In this study, Ti-5553 samples were fabricated using laser powder bed fusion (LPBF), and holes were machined under varying drilling parameters. The machined surfaces and subsurfaces were characterized in terms of microstructure, surface defects, morphology, and roughness. This research highlights the manufacturability of LPBF-built Ti-5553 parts and elucidates the effect of drilling parameters on surface integrity, contributing to the optimization of manufacturing processes.

Keywords

Drilling, Laser powder bed fusion, Machinability, Surface integrity, Surface microstructure, Ti-5553

Department

Aviation and Technology

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