Splitting phenomenon in the precipitation evolution in an Fe–Ni–Al–Ti–Cr stainless steel / H. Leitner in Acta materialia, Vol. 58 N° 4 (Fevrier 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 4 (Fevrier 2010) . - pp. 1261–1269 Titre : Splitting phenomenon in the precipitation evolution in an Fe–Ni–Al–Ti–Cr stainless steel Type de document : texte imprimé Auteurs : H. Leitner, Auteur ; M. Schober, Auteur ; R. Schnitzer, Auteur Année de publication : 2011 Article en page(s) : pp. 1261–1269 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Maraging steel Atom probe tomography Precipitates Résumé : The evolution of precipitation and mechanical properties of an Fe–Ni–Al–Ti–Cr stainless steel was studied during ageing at 525 °C. Atom probe tomography and transmission electron microscopy were applied to follow the microstructural evolution. An initial hardening reaction, which is remarkable in terms of extent, is reported to be caused by the formation of complex multi-component clusters. They are composed mainly of Ni, Al and Ti. After ageing to peak hardness (3 h), splitting of these clusters into spherical and elongated particles was observed. Based on the chemical composition, the spherical precipitates were identified to be of type NiAl B2, and the elongated particles were associated with the η-phase (Ni3(Ti, Al)). Βoth types of precipitates contribute to the strength of the material. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409007241 [article] Splitting phenomenon in the precipitation evolution in an Fe–Ni–Al–Ti–Cr stainless steel [texte imprimé] / H. Leitner, Auteur ; M. Schober, Auteur ; R. Schnitzer, Auteur . - 2011 . - pp. 1261–1269. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 4 (Fevrier 2010) . - pp. 1261–1269 Mots-clés : Maraging steel Atom probe tomography Precipitates Résumé : The evolution of precipitation and mechanical properties of an Fe–Ni–Al–Ti–Cr stainless steel was studied during ageing at 525 °C. Atom probe tomography and transmission electron microscopy were applied to follow the microstructural evolution. An initial hardening reaction, which is remarkable in terms of extent, is reported to be caused by the formation of complex multi-component clusters. They are composed mainly of Ni, Al and Ti. After ageing to peak hardness (3 h), splitting of these clusters into spherical and elongated particles was observed. Based on the chemical composition, the spherical precipitates were identified to be of type NiAl B2, and the elongated particles were associated with the η-phase (Ni3(Ti, Al)). Βoth types of precipitates contribute to the strength of the material. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409007241

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