Development of high temperature dispersion strengthening in rapidly quenched AlTiX alloys

J. F. Nie, A. Majumdar, B. C. Muddle

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A series of binary AlTi alloys and a range of AlTi based ternary alloys containing additions of Ce and Ni have been produced by chill-block melt spinning with a view to generating microstructures comprising a large volume fraction of finely and homogeneously dispersed, thermally stable, intermetallic particles. The microstructures and thermal stability of these alloys have been examined using transmission electron microscopy and the ageing response of an AlTiNi alloy monitored using microindentation hardness measurements. It has been established that high temperature (300-400 °C) precipitation strengthening can be achieved in alloys based on the AlTiNi system, through rapid solidification and postsolidification heat treatment, and that rapidly quenched AlTiNi alloys, with a weight ration Ti:Ni in the range (3:1)-(4:1), appear to have significant potential for applications involving elevated temperatures.

Original languageEnglish
Pages (from-to)619-624
Number of pages6
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Issue numberPART 1
Publication statusPublished - 1 May 1994

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