3D analysis of thermal and stress evolution during laser cladding of bioactive glass coatings

Krzyzanowski, Michal and Bajda, S. and Liu, Yijun and Triantaphyllou, A. and Rainforth, W. Mark and Glendenning, M. (2016) 3D analysis of thermal and stress evolution during laser cladding of bioactive glass coatings. Journal of the Mechanical Behavior of Biomedical Materials, 59. pp. 404-417. ISSN 1751-6161

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Abstract

Thermal and strain-stress transient fields during laser cladding of bioactive glass coatings on the Ti6Al4V alloy basement were numerically calculated and analysed. Conditions leading to micro-cracking susceptibility of the coating have been investigated using the finite element based modelling supported by experimental results of microscopic investigation of the sample coatings. Consecutive temperature and stress peaks are developed within the cladded material as a result of the laser beam moving along the complex trajectory, which can lead to micro-cracking. The preheated to 500oC base plate allowed for decrease of the laser power and lowering of the cooling speed between the consecutive temperature peaks contributing in such way to achievement of lower cracking susceptibility. The cooling rate during cladding of the second and the third layer was lower than during cladding of the first one, in such way, contributing towards improvement of cracking resistance of the subsequent layers due to progressive accumulation of heat over the process.

Item Type: Article
Uncontrolled Keywords: Thermal andstresstransient analysis Additive manufacturing Finite elementmodelling Laser cladding Bioactive glasscoatings
Subjects: H100 General Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Systems Engineering
UoA Collections > UoA15: General Engineering
Depositing User: $ Ian McDonald
Date Deposited: 15 Dec 2016 11:19
Last Modified: 28 Nov 2017 15:52
URI: http://www.open-access.bcu.ac.uk/id/eprint/3710

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