SANS study of structural changes in irradiated FeCu dilute alloys

M.-H. MATHON; F. MAURY; F. DUNSTETTER; N. LORENZELLI; C.-H. DE NOVION; F. BOUÉ

doi:doi:10.1051/jp4:1993854

Numéro		J. Phys. IV France Volume 03, Numéro C8, Décembre 1993 IX International Conference on Small Angle Scattering


Page(s)		C8-279 - C8-282
DOI		https://doi.org/10.1051/jp4:1993854

IX International Conference on Small Angle Scattering

J. Phys. IV France 03 (1993) C8-279-C8-282
DOI: 10.1051/jp4:1993854

SANS study of structural changes in irradiated FeCu dilute alloys

M.-H. MATHON¹, F. MAURY¹, F. DUNSTETTER¹, N. LORENZELLI¹, C.-H. DE NOVION¹ and F. BOUÉ²

¹ Laboratoire des Solides Irradiés, CEA/CEREM, Ecole Polytechnique, 91128 Palaiseau cedex, France
² Laboratoire Léon Brillouin, CE Saclay, 91191 Gif sur Yvette cedex, France

Abstract
Copper-rich precipitates formed in iron based dilute alloys by irradiation or thermal ageing, have been investigated using small angle neutron scattering (SANS). In particular, FeCu1.5% has been studied after either 2.5 MeV electron irradiations at 300°C or thermal ageing at 500°C. Size distribution, composition and number density of the clusters were deduced from SANS data. In addition, microhardness measurements allowed to correlate precipitates configuration with alloys hardening. The precipitation mechanism looks the same for both kinds of ageing, but irradiation induces an additional contribution to hardening. A linear correlation between duration of thermal ageing and irradiation fluence can be established.