TY - JOUR
T1 - Microstructural influences on the decomposition of an Al-containing ferritic stainless steel
AU - Read, H. G.
AU - Murakami, H.
N1 - Funding Information:
H.G.R. would like to thank Dr. H. Harada at the National Research Institute for Metals, Tsukuba (Japan) for arranging this project and the British Council, Tokyo (Japan) for funding. H.G.R. would also like to thank Drs. K. Hono and A.L. Greer for fruitful discussions.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 1996/3
Y1 - 1996/3
N2 - 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.
AB - 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.
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U2 - 10.1016/0169-4332(95)00524-2
DO - 10.1016/0169-4332(95)00524-2
M3 - Article
AN - SCOPUS:16144369142
SN - 0169-4332
VL - 94-95
SP - 334
EP - 342
JO - Applied Surface Science
JF - Applied Surface Science
ER -