Micropillar compression study of Fe-irradiated 304L steel

• DOI: 10.1016/j.scriptamat.2019.07.007
• Publication Date: 2019-07-17T12:14:21Z
• Authors: Elie Paccou; Benoît Tanguy; Marc Legros
• Keywords: [CHIM.MATE]Chemical Sciences/Material chemistry; 02 engineering and technology; [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph]; [CHIM.INOR]Chemical Sciences/Inorganic chemistry; [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]; [SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph]; [SPI.MAT]Engineering Sciences [physics]/Materials; [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]; [PHYS.MECA.STRU]Physics [physics]/Mechanics [physics]/Structural mechanics [physics.class-ph]; [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]; [PHYS.PHYS.PHYS-POP-PH]Physics [physics]/Physics [physics]/Popular Physics [physics.pop-ph]; [PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph]; [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]; [CHIM.CRIS]Chemical Sciences/Cristallography; [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]; 0210 nano-technology

Abstract To assess the irradiation induced hardening and the modification of deformation modes at the grain scale on 304L steels used in irradiated structural components in nuclear reactors, in situ microcompression tests were conducted on irradiated and non-irradiated FIB-made pillars. To surrogate neutron irradiation, steel plates went through 10 MeV Fe-ions irradiations up to 8 dpa at 450 °C. Size effect was detected on unirradiated but not on irradiated pillars, revealing a strong impact of the microstructure on the mechanical behavior. TEM investigations may also have helped understanding the smoother plastic deformation in irradiated pillars.