Using ball indentation to determine the mechanical properties of an Al-7475 alloy processed by high-pressure torsion

Patil, DC and Kori, SA and Venkateswarlu, K and Das, G and Alhajeri, SN and Langdon, TG (2012) Using ball indentation to determine the mechanical properties of an Al-7475 alloy processed by high-pressure torsion. Journal of Materials Science . pp. 1-7. ISSN 0022-2461

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    Abstract

    A commercial Al-7475 alloy with an initial grain size of *40 lm was processed by high-pressure torsion (HPT) for up to 2 turns at room temperature under a pressure of 6.0 GPa. The mechanical properties of the processed materials were evaluated by the ball-indentation technique to give information on the yield strength and the ultimate tensile strength. Following HPT, microhardness measurements revealed a steady increase in the hardness values from the centers of the samples towards the edges. After 2 turns, the ultimate tensile strength was *1050 MPa at the edge of the disk and the measured grain size was*70 nm. The results demonstrate the potential for using HPT to achieve excellent grain refinement in the Al-7475 alloy.

    Item Type: Journal Article
    Additional Information: Copyright to this article belongs to M/s. Springer-Verlag
    Uncontrolled Keywords: Al-7475 alloy;High-pressure torsion;Transmission electron microscopy
    Subjects: AERONAUTICS > Aeronautics (General)
    CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Other, Other, Materials Science Division , Other, Other, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 13 Feb 2013 16:29
    Last Modified: 13 Feb 2013 16:29
    URI: http://nal-ir.nal.res.in/id/eprint/11471

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