Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-127-C7-130
Redistribution of interstitial atoms and ageing of Fe-N α martensiteJ. FOCT and C. CORDIER-ROBERT
Laboratoire de Métallurgie Physique, URA CNRS 234, Université Lille I, Bâtiment C6, 59655 Villeneuve d'Ascq, France
Different experimental measurements show that transformations of martensite occur from very low temperature, often below 77K. In order to understand the redistribution of interstitial atoms which is studied by Mössbauer spectrosopy near room temperature the previous low temperature changes are briefly discussed. The Mössbauer data related to cubic [MATH] and [MATH] Fe-N alloys are presented. It is shown that the interstitial atom distribution and redistribution of interstitial atoms is partially inherited from austenite and that [MATH] nuclei corresponds in [MATH] and [MATH] to N-Fe-N chains oriented along [MATH] in [MATH] and along [MATH] in [MATH].
© EDP Sciences 1993