Microstructure and the thermal stability of rapidly solidified aluminum-rare earth alloys

A. Ruder, D. Eliezer

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

The effect of rapid solidification by the melt spinning process on the Al-4Er and Al-4La alloys has been studied. Compared to the normally solidified master alloy, rapid solidification processing promotes the formation of an eutectic with suppressed, relatively refined microstructures. Varying relative proportions of microstructures occupy the ribbons longitudinal transverse cross sections; a featureless zone at the contact surface, a columnar zone in the middle and an equiaxed-grain zone with degenerate dendrites at the fres surface. The presence of finely dispersed, coherent Al3Er secondary equilibrium phase near the contact surface is evident, as well as the formation of a spherical, metastable L11La3 secondary phase in the near contact zone of the Al-4La alloy. The ribbons microhardness remains fairly stable after isochronal heating up to 300°C and retains, at further elevated temperatures, higher mean values than the master alloy.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalIsrael Journal of Technology
Volume24
Issue number1 -2,pt A
StatePublished - 1 Dec 1988
EventFourth Israel Materials Engineering Conference - I.M.E.C. IV - Beer Sheva, Isr
Duration: 7 Dec 19888 Dec 1988

ASJC Scopus subject areas

  • Engineering (all)

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