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

H. G. Read, Hideyuki Murakami

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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
Volume94-95
DOIs
Publication statusPublished - 1996 Mar 1
Externally publishedYes

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Stainless Steel
Ferritic steel
Stainless steel
Decomposition
Phase separation
Spinodal decomposition
Microanalysis
Convolution
Nanostructured materials
Phase diagrams
Hardening
Solid solutions
Thermodynamics
Recovery
Wavelength
Atoms
MA 956

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Microstructural influences on the decomposition of an Al-containing ferritic stainless steel. / Read, H. G.; Murakami, Hideyuki.

In: Applied Surface Science, Vol. 94-95, 01.03.1996, p. 334-342.

Research output: Contribution to journalArticle

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