Numerical modelling of directed energy deposition and experimental validation based on digital image correlation

Kovšca, Dejan (author), Starman, Bojan (author), Govekar, Edvard (author), Halilovič, Miroslav (author), Mole, Nikolaj (author)

This contribution presents a combined approach for in-situ experimental characterisation and numerical modelling of thermo-mechanical behaviour in directed energy deposition (DED). Full- field temperature and substrate deformation are measured simultaneously using infrared (IR) thermography and stereo digital image correlation (DIC) during laser-beam powder deposition on a thin substrate. The experimental data are used to calibrate thermal boundary conditions and to validate a macroscopic finite-element model. The validated framework is then applied to compare different deposition strategies, demonstrating the capability of the coupled measurements and simulations to capture transient thermal fields, deformation evolution and toolpath-dependent effects relevant for process optimisation.

• Language: English
• Keywords: digital image correlation, directed energy deposition, finite element method, laser cladding
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2026
• Number of pages: 11 str.
• Numbering: Vol. 1047
• PID: 20.500.12556/RUL-182252
• UDC: 621.7:004.9
• ISSN on article: 1662-9795
• DOI: 10.4028/p-m2Tkvy
• COBISS.SI-ID: 277051395
• Publication date in RUL: 05.05.2026

Record is a part of a journal

• Title: Key engineering materials
• Shortened title: Key eng. mater.
• Publisher: Trans Tech Publications
• ISSN: 1662-9795
• COBISS.SI-ID: 13565723

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: korelacija digitalnih slik, usmerjeno nanašanje materiala, metoda končnih elementov, lasersko navarjanje

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0263
• Name: Mehanika v tehniki

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: N2-0328
• Name: Vpliv temperaturnih razmer na mikrostrukturo in mehanske lastnosti aditivno izdelanih materialov