Microstructural influences on the decomposition of an Al-containing ferritic stainless steel

H. G. Read*, H. Murakami

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


The behaviour of as-received and recrystallised (homogenised) MA 956, a Cr-rich ferritic stainless steel, aged at 475 °C for up to 588 h has been investigated. The convolution of recovery and phase separation results in aged as-received material contrasting with hardening due to phase separation only in homogenised material. Atom probe microanalysis of the decomposition products reveals that Al does not partition significantly to the Fe-rich phase, as calculated by phase diagram modelling. The wavelength of the decomposition is found to be significantly larger in aged as-received material compared to aged homogenised material. The spinodal decomposition of the MA 956 supersaturated solid solution is possibly a paraequilibrium transformation with respect to Al. The behaviour of Al is discussed in terms of competing chemical and stress gradients in the nanophase material and the influence of a such a structure on its thermodynamic description.

Original languageEnglish
Pages (from-to)334-342
Number of pages9
JournalApplied Surface Science
Publication statusPublished - 1996 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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