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. Walker
download PDFAbstract. 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.
Keywords
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
DOI: https://dx.doi.org/10.21741/9781945291890-42
The article was published as article 42 of the book Residual Stresses 2018
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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