Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 304, Issue -, Pages 68-72Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(00)01449-0
Keywords
aluminium alloys; glassy matrix; crystals; devitrification microhardness
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The origins of the mechanical properties of partially or fully devitrified alloys are discussed with particular reference to hardness and wear resistance. Quantitative evidence. is presented that nanophase composites, consisting of a dispersion of nanometre-scale crystallites in a glassy matrix, show a novel hardening mechanism based on solute enrichment of the glassy matrix. The importance of microstructural stale is considered, particularly for wear resistance. Focusing on aluminium alloys, the novel nanophase composites and the glassy alloys from which they are derived are compared with conventional high-strength alloys. (C) 2001 Published by Elsevier Science B.V.
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