Nanosecond time-resolved thermo-acoustics in refractory metals undergoing laser pulse-induced phase transition: Finite difference modeling

Istvan A. Veres, Zhandos N. Utegulov, Arthur E. Every

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

    1 Citation (Scopus)

    Abstract

    The presented work investigates the metal-to-liquid phase transition induced by a nanosecond pulsed-laser. The generation and propagation of the elastic waves by the surface thermal source is described by the coupled heat conduction and elastic wave equations and solved using a numerical finite difference time domain (FDTD) technique. During laser-induced melting the molten mass loses its rigidity and the generation of the shear waves is significantly influenced by a shallow melt pool, while the propagation of longitudinal waves remains less influenced. Numerical simulations are carried out to investigate the possibility to detect laser-induced melting in tungsten by utilizing this effect. In particular, the arrival of the shear waves in the epicentral wave form is monitored to detect the presence of molten material.

    Original languageEnglish
    Title of host publicationIEEE International Ultrasonics Symposium, IUS
    PublisherIEEE Computer Society
    Pages2474-2477
    Number of pages4
    ISBN (Electronic)9781479970490
    DOIs
    Publication statusPublished - Oct 20 2014
    Event2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States
    Duration: Sep 3 2014Sep 6 2014

    Publication series

    NameIEEE International Ultrasonics Symposium, IUS
    ISSN (Print)1948-5719
    ISSN (Electronic)1948-5727

    Other

    Other2014 IEEE International Ultrasonics Symposium, IUS 2014
    CountryUnited States
    CityChicago
    Period9/3/149/6/14

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

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