Computational investigation of superalloy persistent slip bands formation

Jianfeng Huang, Zhonglai Wang, Yuanxin Luo, Yun Li, Erfu Yang, Yi Chen

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Persistent slip bands (PSB) is the important and typical microstructure generated during fatigue crack initiation. Intensive works have been done to investigate the mechanisms of the formation of persistent slip bands in the past decade. In this paper, a molecular dynamics (MD) simulation associated with embedded atom model (EAM) is applied on the PSBs formation in nickel-base superalloys with different microstructure and temperature under tensile-tensile loadings. Simulation results show that PSBs formed within the γ phase by massive dislocations pile-up and propagation which can penetrate the grain. Also, the temperature will affect the material fatigue performance and blur PSBs appearance. The simulation results are in strong agreement with the experimental test results published before.
    Original languageEnglish
    Title of host publication2015 21st International Conference on Automation and Computing: Automation, Computing and Manufacturing for New Economic Growth, ICAC 2015
    Place of PublicationNew York
    PublisherIEEE
    ISBN (Electronic)978-0-9926-8011-4
    ISBN (Print)9780992680107
    DOIs
    Publication statusPublished - 2 Nov 2015

    Keywords

    • Persistent slip bands
    • PSB
    • fatigue
    • strain
    • load modeling
    • stress
    • FCC
    • Nickel
    • lattices
    • Molecular Dynamics
    • Comput ational Simulation
    • Superalloys
    • Persistent Slip Bands

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