Speaker
Jun Young Park
(Korea Institute of Materials Science)
Description
The effect of addition of Ti on microstructures and mechanical properties in RAFM steels were investigated. Ti-bearing RAFM steels, designed based on the thermodynamic calculation, were fabricated by vacuum induction melting and hot-rolling process. All samples were heat treated by normalizing and tempering, resulting in tempered martensite with M23C6 carbides and MX precipitates. The microstructures were analyzed using optical, scanning electron and transmission electron microscopies quantitatively as well as qualitatively. Mechanical properties of the samples were evaluated by Vickers hardness, Charpy impact and tensile tests at various temperatures. The results indicated that Ti-added RAFM steels have enhanced tensile properties without sacrificing impact toughness due to precipitation of nanometer-sized (Ti,W)C carbides and decrease in the average size M23C6 of particles compared to the conventional RAFM steels.
Co-authors
Chang-Hoon Lee
(Korea Institute of Materials Science, Changwon, South Korea)
Hyoung Chan Kim
(National Fusion Research Institute, Daejeon, South Korea)
Joonoh Moon
(Korea Institute of Materials Science, Changwon, South Korea)
Jun Young Park
(Korea Institute of Materials Science, Changwon, South Korea)
Tae-Ho Lee
(Korea Institute of Materials Science, Changwon, South Korea)
Woo-Kyoung Seol
(Korea Institute of Materials Science, Changwon, South Korea)
