| Title |
Strength Properties of Fe-12~17% Cr Nano-Sized Oxide Dispersion Strengthened Ferritic Alloys Fabricated by Mechanical Alloying |
| Authors |
김익수(Ick Soo Kim); 장진성(Jin Sung Jang); 강창용(Chang Yong Kang) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
ODS; Ferritic alloys; Mechanical alloying; Nano-sized oxides; Strength properties; Tensile properties; Heat-resistant steel |
| Abstract |
Recently, oxide dispersion strengthened(ODS) ferritic alloys have been considered for the critical component materials of ultra-super critical pressure power plants or nuclear power plants. The strength properties of ferritic 12%Cr ODS alloys with the addition of Ti and W were investigated in comparison with those of 17% Cr ODS and 12%Cr ODS alloys in the range of room temperature to 1323K. Nano-sized oxide dispersoids in the alloys suppressed the grain growth during annealing at a 1323K and resulted in a remarkable improvement of the strength. The fine particles in 12%Cr ODS alloys with the addition of Ti and W was identified to be a complex oxide type of Y-Ti-O. The Complex oxides containing Ti was the finest and showed the most uniform dispersion. |