Strain effects on the thermal stability of rod eutectics

A. M. Mayes*, M. Olvera de la Cruz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Strain effects are included in the thermal stability analysis of rod eutectic structures. The growth rate or decay of a radial perturbation of a given wavelength along the rod axis is analyzed. When no strain effects are included, the perturbation grows for wave vectors (kR0) < 1, where R0 is the unperturbed rod radius. Introducing strain effects in a coherent interface strongly affects the rod stability. When f{hook} R0, where f{hook} is the surface stress, is very small, the instability for (kR0) < 1 is enhanced. For larger values of f{hook} R0, however, the strain effects stabilize the rods. The critical wave vector, (kR0)cr, below which instabilities occur, decreases as f{hook} R0 increases. There is a limiting value of f{hook} R0 above which the rod structure is stable against all fluctuations, including those of infinite wavelength.

Original languageEnglish (US)
Pages (from-to)615-620
Number of pages6
JournalActa Metallurgica
Volume37
Issue number2
DOIs
StatePublished - Feb 1989

ASJC Scopus subject areas

  • Engineering(all)

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