Initial transient phase and stability of annular laser beam direct wire deposition

Kotar, Matjaž (author), Fujishima, Makoto (author), Levy, Gideon N. (author), Govekar, Edvard (author)

In this paper the stability of the annular laser beam (ALB) direct wire-deposition process, which enables process symmetry and a well-defined ALB workpiece irradiation proportion (WIP) and related energy input onto the workpiece and the wire surface is considered. Various initial process phase strategies with respect to different initial wire-end positions and WIPs were analysed based on the process visualization and outcome, and the melt pool temperature. It was shown that in addition to a precise synchronization of the mutually time-dependent ALB power, wire and workpiece feeding velocity, the fastest and the most robust transition into a stable stationary process could be achieved with the initial position of the wire-end on the workpiece surface. Additionally, the WIP was shown to have a strong and nonlinear influence on the process stability.

• Language: English
• Keywords: additive manufacturing, lasers, wire
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2019
• Number of pages: Str. 233-236
• Numbering: Vol. 68, iss. 1
• PID: 20.500.12556/RUL-108519
• UDC: 621.791(045)
• ISSN on article: 0007-8506
• DOI: 10.1016/j.cirp.2019.04.118
• COBISS.SI-ID: 16601883
• Publication date in RUL: 05.07.2019

Record is a part of a journal

• Title: CIRP annals
• Shortened title: CIRP ann.
• Publisher: Technische Rundschau, Hallwag Verlag, Colibri, Elsevier
• ISSN: 0007-8506
• COBISS.SI-ID: 170267

Secondary language

• Language: Slovenian
• Keywords: dodajne tehnologije, laserji, žice

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0241
• Name: Raziskovalni program Sinergetika kompleksnih sistemov in procesov