Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloy
type: Dataset
description: The direct metal deposition (DMD) laser technique is a free-form metal deposition process, which allowsgenerating a prototype or small series of near net-shape structures. Despite numerous advantages, oneof the most critical issues of the technique is that produced pieces have a deleterious surface finish whichrequires post machining steps. Following recent investigations where the use of laser pulses instead of acontinuous regime was successful to obtain smoother DMD structures, this paper relates investigationson the influence of a pulsed laser regime on the surface finish induced by DMD on a widely used titaniumalloy (Ti64). Findings confirm that using high mean powers improves surface finish but also indicate aspecific effect of the laser operating mode: using a quasi-continuous pulsed mode instead of fully-cw laserheating is an efficient way for surface finish improvement. For similar average powers, the use of a pulsedmode with large duty cycles is clearly shown to provide smoothening effects. The formation of larger andstable melt pools having less pronounced lateral curvatures, and the reduction of thermal gradients andMarangoni flow in the external side of the fusion zone were assumed to be the main reasons for surfacefinish improvement. Additional results indicate that combining the benefits from a pulsed regime and auniform laser irradiation does not provide further reduction of surface roughness.
issued: 2026-05-05T14:09:13.921495
language: en
modified: 2026-05-05T14:09:13.921500
contact point: Organization
  fn: CCSD
keyword: deposition
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: laser
keyword: manufacturing
keyword: physmecamemaphysics-physicsmechanics-physicsmechanics-of-materials-physicsclass-ph
keyword: physmecasolidphysics-physicsmechanics-physicssolid-mechanics-physicsclass-ph
keyword: spimecamemaengineering-sciences-physicsmechanics-physicsmed-phmechanics-of-materials-phy
keyword: spimecasolidengineering-sciences-physicsmechanics-physicsmed-phsolid-mechanics-physicsc
keyword: surface
keyword: titanium
landing page: 0924-0136

Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloy
type: Distribution
format: HTML
issued: 2026-05-05T14:09:13.927457
modified: 2026-05-05T14:09:13.909162
access URL: https://hal.science/hal-00980579

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type: Agent