Title

Microstructure and mechanical properties of Al-Zr nanocomposite materials

Authors

Authors

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

Comments

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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

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