STP1454: Ultrasonic Measurement Technique of Burning Metals in Normal and Reduced Gravity

    Chiffoleau, GJA
    Material Test Engineer, Wendell Hull and Associates, Las Cruces, NM

    Steinberg, TA
    Senior Lecturer, University of Queensland, Brisbane, QLD

    Veidt, M
    Senior Lecturer, University of Queensland, Brisbane, QLD

    Pages: 16    Published: Jan 2003


    Abstract

    The in situ real time measurement of the regression rate of a melting interface (RRMI) is performed by the ultrasonic measurement system reported here. The RRMI is the rate at which a solid/liquid interface (SLI) moves along a metallic rod while burning in an oxygen-enriched atmosphere and is an important flatnmability indicator. The ultrasonic transducer and associated equipment used to drive the transducer and record the echo signal is described, along with the process that transforms the acquired signals into a RRMI value. Test rods of various metals and geometric shapes were burned at several test conditions in different test facilities. The RRMI results with quantified errors are presented and reviewed. The effect of reduced gravity on burning metals is important to space-applications and RRMI results obtained in a reduced gravity environment are also presented.

    Keywords:

    metals flammability, regression rate of a melting interface, solid/liquid interface, guided wave ultrasonics, pulse-echo technique, reduced gravity


    Paper ID: STP11581S

    Committee/Subcommittee: G04

    DOI: 10.1520/STP11581S


    CrossRef ASTM International is a member of CrossRef.