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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제6호
발행연도
2014.1
수록면
857 - 862 (6page)

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Mechanical alloying under various gas atmospheres such as Ar, an Ar-H2 mixture, and He gases were carried out, andits effects on the powder properties, microstructure and mechanical properties of ODS ferritic steels were investigated. Hot isostatic pressing and hot rolling processes were employed to consolidate the ODS steel plates. While the mechanicalalloyed powder in He had a high oxygen concentration, a milling in Ar showed fine particle diameters with comparablylow oxygen concentration. The microstructural observation revealed that low oxygen concentration contributed to theformation of fine grains and homogeneous oxide particle distribution by the Y-Ti-O complex oxides. A milling in Arwas sufficient to lower the oxygen concentration, and this led a high tensile strength and fracture elongation at a hightemperature. It is concluded that the mechanical alloying atmosphere affects oxygen concentration as well as powderparticle properties. This leads to a homogeneous grain and oxide particle distribution with excellent creep strength at hightemperature.

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