Micromechanical model for fatigue limit of metal AM parts and materials

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Fatigue remains a challenge especially for high end metal AM parts and materials. From a design perspective, the fatigue limit of an AM solution can be improved upon by optimizing the manufacturing process for a certain material and part. In addition, improved accuracy of design methodologies aids in capturing the features critical for fatigue and quantifies their significance to desired part lifetime as well as providing a basis for their avoidance. In current work we present an overall concept merging thermomechanical process and powder bed solidification modeling to micromechanical analysis of fatigue of the resulting material microstructure. Material features critical to fatigue, particularly surface roughness, internal defects such as porosity and cracks and on the other hand inclusions, can be assessed directly on the basis of AM part microstructure with respect to the resulting fatigue limit. Case analyses consist of maraging steel and nickel alloys. The overall scheme provides a basis for optimization of metal AM solutions against fatigue and multiscale modeling founded basis for fatigue design.

    Original languageEnglish
    Title of host publicationEuro PM 2018 Congress and Exhibition
    PublisherEuropean Powder Metallurgy Association (EPMA)
    ISBN (Electronic)978-1-8990-7250-7
    Publication statusPublished - 2018
    MoE publication typeA4 Article in a conference publication
    EventEuro PM2018 Congress & Exhibition - Bilbao, Spain
    Duration: 14 Oct 201818 Oct 2018
    https://www.europm2018.com/ (Event site)
    https://www.epma.com/publications/euro-pm-proceedings/product/euro-pm2018-proceedings-usb (Proceedings)


    ConferenceEuro PM2018 Congress & Exhibition
    Internet address


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