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    • Effects of as-built surface with varying number of contour passes on high-cycle fatigue behavior of additively manufactured nickel alloy 718

    Metadata Updated: September 30, 2023

    Abstract (from the manuscript): High cycle fatigue life of laser-powder bed fusion (L-PBF) parts depends on several factors; as-built surfaces, when present, are a particular concern. This work measures as-built L-PBF surfaces with X-ray computed tomography, and uses rotating beam fatigue (RBF) testing to measure high cycle fatigue life. Surfaces with different, but consistent, characteristics are achieved by build in vertical specimens and changing only the number of contour passes. In this way, specimens with three different levels of surface roughness are compared to standard polished specimens. The results from this show that surface roughness increases with decreasing number of contour passes, but the impact on fatigue lifetime is not trivially related. Electron microscopy and x-ray computed tomography images show multiple initiation points and complex surface topology, but that surface feature depth is not necessarily correlated to failure location. Two primary conclusions are that 1) for the case of as-built surfaces loaded in bending, one contour pass is sufficient to achieve peak as-built performance, and even zero contour passes was not statistically significantly different from two passes; 2) surface feature depth, even when measured using metal-penetrating imaging, is not strongly associated with failure location in our data. When assessing AM surfaces, more factors (e.g., grain orientation) may be required to mechanistically understand the performance implications.This dataset is comprised of four main types of data: 1. Build data, including CAD files and heat treatment logs. 2. Fatigue data, from RBF testing tabulated in the form of measured stresses and forces, and fatigue lives (cycle counts). 3. Fractography data, in the form of SEM and optical images of failure surfaces after RBF testings. 4. X-ray Computed Tomography data, comprising 3D images, associated image processing codes, and tabulated data describing the surface profiles and deepest surface notches for 6 specimens of particular interest.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

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    References

    https://doi.org/10.1016/j.ijfatigue.2023.107872

    Dates

    Metadata Created Date September 30, 2023
    Metadata Updated Date September 30, 2023

    Metadata Source

    Harvested from NIST

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 30, 2023
    Metadata Updated Date September 30, 2023
    Publisher National Institute of Standards and Technology
    Maintainer
    Identifier ark:/88434/mds2-3044
    Data First Published 2023-07-20
    Language en
    Data Last Modified 2023-07-06 00:00:00
    Category Manufacturing:Additive manufacturing, Materials:Metals, Materials:Materials characterization
    Public Access Level public
    Bureau Code 006:55
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id a0e6c0c6-48ce-4d8a-b0c0-87f2c8fd2b76
    Harvest Source Id 74e175d9-66b3-4323-ac98-e2a90eeb93c0
    Harvest Source Title NIST
    Homepage URL https://data.nist.gov/od/id/mds2-3044
    License https://www.nist.gov/open/license
    Program Code 006:045
    Related Documents https://doi.org/10.1016/j.ijfatigue.2023.107872
    Source Datajson Identifier True
    Source Hash 0b6746998b5a24efbb75033004ded077a21a5e9d0edce0cd85e5d96a760f6d55
    Source Schema Version 1.1

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