DOUBLE MECHANICAL ALLOYING OF AL-5WT-PERCENT-FE-4WT-PERCENT-MN

被引：14

作者：

LEBRUN, P

FROYEN, L

DELAEY, L

机构：

[1] Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, B-3001 Leuven

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1992年 / 157卷 / 01期

关键词：

D O I：

10.1016/0921-5093(92)90101-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanical alloying process has been applied to a blend of Al, Fe and Mn powders, in order to produce an Al alloy stabilized by inert dispersions and strengthened by a high volume fraction of intermetallics. The microstructure obtained after a first grinding operation consists of unreacted Fe and Mn particles embedded in a fine grained Al matrix. Intermetallics are formed during heat treatment of the milled powders and are refined in a subsequent mechanical alloying stage. During heat treatment of the powders a metastable Al6Fe intermetallic phase is formed. This phase is stabilized by Mn replacing part of the Fe which results in an Al6(Fe,Mn) intermetallic. In the alloy studied in detail (Al-5wt.%Fe-4wt%Mn), the intermetallic has the composition Al12FeMn. Some Al6Mn also forms around large Mn particles, slowing down diffusion of Mn towards the Al6Fe particles. Mechanical properties are evaluated and the E modulus is shown to be a function of the volume fraction of intermetallics.

引用

页码：79 / 88

页数：10

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