Investigation of Significant Factors on Deformation with Powder Bed Fusion System
Powder bed fusion (PBF) is one of the most popular techniques in additive manufacturing (AM). The PBF technique of selective laser melting (SLM) consolidates powder layer by layer using a laser as the energy source. This technique ensures the processes capability of fabricating components with internal and external complex geometries, which could be challenging to make with conventional manufacturing methods. However, the cyclic heating and cooling inherent in this process give rise to the buildup of residual stresses, which can distort or completely deform the part. In this work, a screening build with nine factors was designed to investigate the effects of component size, support structure, and energy input on the build completion and average distortion induced by the inherent residual stress. Experimental results indicated that support hatch spacing, part thickness, and support contact spacing played dominant roles in the final quality (i.e. resultant deformation) of the built parts. The identified significant factors from this study can be carefully selected to increase the success rates of single builds and improve the qualities (i.e. geometric accuracy) of the final products.
T. Pan et al., "Investigation of Significant Factors on Deformation with Powder Bed Fusion System," Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, vol. 235, no. 5, pp. 902-911, SAGE Publications, Apr 2021.
The definitive version is available at https://doi.org/10.1177/0954405420970088
Mechanical and Aerospace Engineering
Keywords and Phrases
deformation; distortion; residual stress; Selective laser melting; support structures
International Standard Serial Number (ISSN)
Article - Journal
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01 Apr 2021