Al-Al3Ti nanocomposites produced in situ by friction stir processing

被引：359

作者：

Hsu, C. J. ^{[1
]}

Chang, C. Y. ^{[1
]}

Kao, P. W. ^{[1
]}

Ho, N. J. ^{[1
]}

Chang, C. P. ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Inst Mat Sci & Engn, Kaohsiung 804, Taiwan

来源：

ACTA MATERIALIA | 2006年 / 54卷 / 19期

关键词：

metal matrix composites; friction stir processing; intermetallic compound;

D O I：

10.1016/j.actamat.2006.06.054

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

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.

引用

页码：5241 / 5249

页数：9

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