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    On optimization of surface roughness of selective laser melted stainless steel parts: A statistical study

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    Authors
    Alrbaey, K.
    Wimpenny, D.
    Tosi, R.
    Manning, W.
    Moroz, A.
    Affiliation
    De Montfort Univerisity
    MTC Coventry
    Issue Date
    2014-04-22
    
    Metadata
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    Abstract
    In this work, the effects of re-melting parameters for postprocessing the surface texture of Additively Manufactured parts using a statistical approach are investigated. This paper focuses on improving the final surface texture of stainless steel (316L) parts, built using a Renishaw SLM 125 machine. This machine employs a fiber laser to fuse fine powder on a layer-by-layer basis to generate three-dimensional parts. The samples were produced using varying angles of inclination in order to generate range of surface roughness between 8 and 20 µm. Laser re-melting (LR) as post-processing was performed in order to investigate surface roughness through optimization of parameters. The re-melting process was carried out using a custom-made hybrid laser re-cladding machine, which uses a 200 W fiber laser. Optimized processing parameters were based on statistical analysis within a Design of Experiment framework, from which a model was then constructed. The results indicate that the best obtainable final surface roughness is about 1.4 µm ± 10%. This figure was obtained when laser power of about 180 W was used, to give energy density between 2200 and 2700 J/cm2 for the re-melting process. Overall, the obtained results indicate LR as a post-build process has the capacity to improve surface finishing of SLM components up to 80%, compared with the initial manufactured surface.
    Citation
    Alrbaey, K., Wimpenny, D., Tosi, R., Manning, W. and Moroz, A., (2014). 'On optimization of surface roughness of selective laser melted stainless steel parts: a statistical study'. Journal of Materials Engineering and Performance, 23(6), pp. 2139-2148.
    Publisher
    Springer Science and Business Media LLC
    Journal
    Journal of Materials Engineering and Performance
    URI
    http://hdl.handle.net/10545/624534
    DOI
    10.1007/s11665-014-0993-9
    Additional Links
    http://hdl.handle.net/2086/10074
    https://link.springer.com/article/10.1007%2Fs11665-014-0993-9
    Type
    Article
    Language
    en
    ISSN
    1059-9495
    EISSN
    1544-1024
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11665-014-0993-9
    Scopus Count
    Collections
    Department of Mechanical Engineering & the Built Environment

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