Additive manufacture (AM) is utilized for rocket engine component production. Witness marks are visible lines across the surface of an AM part that result from variation in build process. Witness marks have been used as justification to scrap a part with little to no evidence. The probability of witness mark occurrence is relatively high and greatly increases AM part production costs and schedule risks. The objective of this study was to quantify the impact of witness marks generated by intentional build pauses and characterize functional characteristics of the AM components. CT, μ-CT, metallographic, and mechanical test results indicate that witness marks are a surface phenomenon that do not propagate into the bulk of a part and had no statistically significant change on microstructure or properties in AlSi10Mg.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Characterizing Effects of Potential Build Induced Artifacts in L-PBF Components


    Contributors:

    Conference:

    AIAA Propulsion & Energy Forum ; 2020 ; Virtual, US


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Characterizing Effects of Potential Build Induced Artifacts in L-PBF Components

    Mireles, Omar / Tilson, William / Rodriguez, Omar et al. | AIAA | 2020


    CHARACTERIZING EFFECTS OF POTENTIAL BUILD INDUCED ARTIFACTS IN L-PBF COMPONENTS

    Mireles, Omar / Tilson, William / Rodriguez, Omar et al. | TIBKAT | 2020


    Components - new-build or rebuild?

    Luczak, Marybeth | IuD Bahn | 2000


    Artifacts

    Harris, Samantha | NTRS | 2009


    Vehicle assemblies with loose layered build components

    GLICKMAN DAVID BRIAN / LAKATOS STEVE MICHAEL / JOHNSON KEVIN BERINGTON et al. | European Patent Office | 2022

    Free access