Formation, microstructure and mechanical properties of Al-Fe base quasicrystalline alloys

被引：47

作者：

Kimura, HM ^{[1
]}

Sasamori, K ^{[1
]}

Inoue, A ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 294卷

关键词：

aluminum-base alloy; quasicrystalline particle; powder metallurgy; mechanical property; elevated temperature strength;

D O I：

10.1016/S0921-5093(00)01192-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An icosahedral (I) phase in coexistence with Al-phase was formed in the size fraction range up to 125 mum of atomized Al93Fe3Cr2Ti2 powder. The decomposition temperature of the I-phase is about 790 K. As per energy dispersive X-ray spectroscopy analysis, the constituent composition of the I-phase is Al84.2Fe7.0Cr6.3Ti2.5. It is found that the Al84.2Fe7.0Cr6.3Ti2.5 alloy forms a mostly single I-phase in the melt-spun state. Bulk I-alloys in a rod form were produced by extrusion of the atomized powders at 673 K and an extrusion ratio of 10. The extruded Al93Fe3Cr2Ti2 alloys have good mechanical properties, i.e., sigma (0.2) of 550 MPa, sigma (UTS) of 660 MPa and epsilon (p) Of 4.5% at room temperature and sigma (0.2) of 330 MPa, sigma (UTS) of 350 MPa and epsilon (p) Of 1.5% at 573 K. The I-based Al93Fe3Cr2Ti2 alloy is expected to be useful as a new type of high-elevated temperature strength material. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：168 / 172

页数：5

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