Microstructure and mechanical properties of Al-Zr nanocomposite materials

    Authors

    B. Srinivasarao; C. Suryanarayana; K. Oh-ishi;K. Hono

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.

    Keywords

    Aluminum alloy; Nanocrystal; Nanocomposites; Mechanical alloying; Spark; plasma sintering; HIGH-STRENGTH; MG ALLOY; POWDER-METALLURGY; HIGH-PRESSURE; TI ALLOY; BEHAVIOR; CONSOLIDATION; EXTRUSION; DUCTILITY; SC; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

    Abstract

    Three different processing routes were explored to develop Al-Zr nanocomposite alloys using mechanical alloying and spark plasma sintering methods. Depending on the route of milling adopted, the powder in the as-milled condition consisted of either a solid solution of Zr in Al or a mixture of Al-solid solution and Al(3)Zr (L1(2)) phases. The alloys after sintering consisted of Al and Al(3)Zr (L1(2)) with grain sizes of less than 100 nm. These nanocomposite alloys exhibited a high compressive strength of 1 GPa with 10% plasticity. The high strength observed in these alloys was explained on the basis of the retention of nanometer sized grains and also the fine dispersion of the L1(2) phase. On the other hand, the good amount of plasticity was explained to be due to excellent bonding between the powder particles and the presence of coarse At grains in the matrix. (C) 2009 Elsevier B.V. All rights reserved.

    Journal Title

    Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

    Volume

    518

    Issue/Number

    1-2

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    100

    Last Page

    107

    WOS Identifier

    WOS:000268532300016

    ISSN

    0921-5093

    Share

    COinS