STP889

    Microindentation Hardness Measurements on Metal Powder Particles

    Published: Jan 1985


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    Abstract

    The National Bureau of Standards has undertaken a rather extensive metal processing program whereby metal powders will be produced by the inert gas atomization process. Powder particle sizes are expected to range from about 10 to 100 μm in diameter. Part of the overall program is the determination of the mechanical properties of the individual powder particles in the as-produced condition. Conventional microindentation hardness is one of the techniques that is planned to be employed for the characterization of mechanical properties. In order to determine the applicability of this technique to very small particles, commercially available and experimental powders ranging in size from 3 to 165 μm have been mounted in various metallographic mounting media as well as in an electrodeposited metal mounting medium in order to evaluate the effects of the properties of the mounting materials on the measured hardness values. The effects of different applied loads and variations in particle size are also evaluated.

    Keywords:

    metal alloy powder, metal powder, microindentation hardness, rapid solidification, Vickers microindentation hardness, microindentation hardness testing


    Author Information:

    Shives, TR
    Metallurgist and physical science technician, National Bureau of Standards, Gaithersburg, MD

    Smith, LC
    Metallurgist and physical science technician, National Bureau of Standards, Gaithersburg, MD


    Paper ID: STP32962S

    Committee/Subcommittee: E04.05

    DOI: 10.1520/STP32962S


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