Evaluation of In-Process Laser Heat Treatment on the Stress Conditions in Laser Metal Deposited Stellite® 21
G.L. Payne, I. Violatos, S. Fitzpatrick, D. Easton, J. Walkerdownload PDF
Abstract. Laser Metal Deposition with Powder (LMD-p) has been investigated as a means of Remanufacturing high value components, such as tooling, dies and moulds. However, the
LMD-p process is known to develop high levels of residual stresses within the builds, which may have an effect on the mechanical performance of the components. Heat treatment is a common method for stress relieving, however, large components or those undergoing ReManufacturing may not be suitable for conventional stress relieving heat treatments processes, such as those using a furnace. Therefore, localised and dynamic heat treatment using the laser installed on the
LMD-p apparatus has been investigated as means of providing stress relieving heat treatment. As such, research to understand the generation and distribution of stresses has been undertaken in conjunction with micro-structural analysis to provide a robust evaluation. A combination of Contour Method, XRD, Micro-Hardness and SEM imaging was used for analysis. Preliminary assessments have largely shown positive results as the specimen with in-process heat treatment has exhibited low and relatively uniform stress fields.
Additive Manufacturing, Laser Metal Deposition, Residual Stress, XRD, Contour Method, Micro-Hardness, Energy Density, Micro-Structural Analysis
Published online 9/11/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: G.L. Payne, I. Violatos, S. Fitzpatrick, D. Easton, J. Walker, ‘Evaluation of In-Process Laser Heat Treatment on the Stress Conditions in Laser Metal Deposited Stellite® 21’, Materials Research Proceedings, Vol. 6, pp 265-270, 2018
The article was published as article 42 of the book Residual Stresses 2018
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