Study of the irradiation hardening of a Fe9Cr ferritic model alloy by nanoindentations

• DOI: 10.1016/j.nme.2024.101667
• Publication Date: 2024-04-30T08:17:49Z
• Authors: D. Zhou; P. Spätig; Q. Hayat; P. Song; N. Jennett; J.-C. Chen; P. Desgardin
• Keywords: Indentation; Hardening (computing); Equiaxed crystals; Penetration (warfare)

This paper presents a series of Berkovich indentation results obtained on unirradiated and 7.2 MeV proton irradiated specimens Fe9Cr model alloy with an equiaxed ferritic microstructure. Using energy degrader wheel made 24 aluminum foils different thickness, flat damage profile about 50 μm resulted from the irradiation, allowing to perform indentations within volume material that is homogeneously irradiated. The size effect measured hardness was analyzed based disloction-slip distance theory built concept combined spatial frequency all obstacles dislocation motion. effects tip-specimen contact (or penetration depth), density mean between irradiation defects were quantified discussed. hardening characterized by increase determined at large depths.