Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys

K. V. Rajulapati, R. O. Scattergood, K. L. Murty, Z. Horita, T. G. Langdon, C. C. Koch

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)

    Abstract

    The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using high-pressure torsion (HPT). Hardness measurements were made to determine the effects on mechanical properties. Based on existing models, the hardening effect of W particles in HC samples was attributed to Orowan-particle strengthening. Composite-type strengthening due to large W particles appeared to be negligible. Both the compressive strain and shear strain in high pressure torsion added to the strengthening effects without producing a change in the grain size.

    Original languageEnglish
    Pages (from-to)2528-2534
    Number of pages7
    JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    Volume39
    Issue number10
    DOIs
    Publication statusPublished - Oct 2008

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys

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