»ã±¨±êÌâ (Title)£º»ùÓÚÔö²ÄÔì×÷µÄFM-ODSºÏ½ðÑз¢½øÕ¹£¨Additive manufacturing based FM-ODS Alloy Development£©

»ã±¨ÈË (Speaker)£ºSuk Hoon Kang×êÑÐÔ±£¨º«¹úÔ­×ÓÄÜ×êÑÐÔº£©

»ã±¨¹¦·ò (Time)£º2024Äê12ÔÂ6ÈÕ(ÖÜÎå) 9:00

»ã±¨µØÖ· (Place)£ºÐ£±¾²¿¸´ºÏ»ïÁÏ×êÑÐÖÐÐÄһ¥»áÒéÊÒA101

Ô¼ÇëÈË(Inviter)£ºÃ«Ó׶« ×êÑÐÔ±

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»ã±¨ÌáÒª£ºHardfacing alloys should be resistant to severe deformation and wear in nuclear reactors while minimizing gamma radionuclides such as cobalt at the same time. Oxide dispersion strengthened (ODS) ferritic/martensitic (FM) steel is a candidate hardfacing material for nuclear reactors because yttrium-based nano oxides resist deformation and wear. FM-ODS steel powders are conventionally fabricated with ball milling to disperse nano yttria in FM steel powder. However, nano yttria inside the ODS powders are frequently agglomerated during laser-directed energy deposition (L-DED) process. Recently, dissolving yttrium during the gas atomization process is an alternative way to produce ODS powders but yttrium is highly reactive with ceramic crucible. In this study, FM-ODS steel powder was produced by electron induction melting gas atomization (EIGA) process without using crucible. Powder morphology and microstructure were observed using a scanning electron microscope (SEM) and SEM-energy dispersive X-ray spectroscopy (EDS). The size distribution and number density of yttria were calculated with transmission electron microscope (TEM). The nanohardness of EIGA ODS powders were conducted at 10mN force.