期刊
ACTA MATERIALIA
卷 54, 期 19, 页码 5241-5249出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2006.06.054
关键词
metal matrix composites; friction stir processing; intermetallic compound
Aluminum reinforced with a large amount (up to similar to 50 vol.%) of nanometer-sized Al3Ti particles can be fabricated from Al-Ti elemental powder mixtures via frictior. stir processing (FSP). This technique combines the hot working nature of FSP and the exothermic reaction between aluminum and titanium. For the production of intermetallic reinforced in situ composites, FSP can provide (a) severe deformation to promote mixing and refining of the constituent phases in the material, (b) elevated temperature to facilitate the formation of intermetallic phase in situ, and (c) hot consolidation to form a fully dense solid. Due to the fine dispersion of Al3Ti particles, the aluminum matrix has a submicronieter-grained structure. As a result of the high Al3Ti content and very fine microstructure, the composites possess enhanced Young's modulus and strength. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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