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- W2056604559 abstract "차세대 발전소재로 주목 받고 있는 초초임계압 페라이트기 강의 고온 등온열화손상을 평가하였다. 고온 등온열화에 따른 가역 투자율을 측정하여 미세조직 변화와의 상관성과 그 영향에 관하여 연구하였다. 고온 등온열화는 미세한 템퍼링 석출물(<TEX>$Cr_{23}C_6$</TEX>)을 성장시키고, 새로운 금속간 화합물(<TEX>$Fe_2W$</TEX>)을 생성시켰으며 급격한 조대화를 보였다. 또한, 래스 내부의 전위밀도를 크게 감소시켰다. 가역투자율로부터 측정한 동적 보자력은 등온열화 초기 약 500시간 이내에 급격하게 감소하고 이후 서서히 감소하였다. 이는 자벽에 대한 고착점의 개수감소와 밀접한 관련이 있으며, 미세한 석출물, 전위 및 마르텐사이트 래스와 관련된다. The high-temperature isothermal aging is studied in ultra-supercritical steel, which is attractive to the next generation of power plants. The effects of microstructure on reversible permeability are discussed. Isothermal aging was observed to coarsen the tempered carbide (<TEX>$Cr_{23}C_6$</TEX>), generate the intermetallic (<TEX>$Fe_2W$</TEX>) phase and grow rapidly during aging. The dislocation density also decreases steeply within lath interior. The dynamic coercivity, measured from the peak position of the reversible permeability profile decreased drastically during the initial 500 h aging period, and was thereafter observed to decrease only slightly. The variation in dynamic coercivity is closely related to the decrease in the number of pinning sites, such as dislocations, fine precipitates and the martensite lath." @default.
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- W2056604559 date "2009-06-30" @default.
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- W2056604559 title "Characterization of the High-temperature Isothermal Aging in USC Ferritic Steel Using Reversible Permeability" @default.
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- W2056604559 doi "https://doi.org/10.4283/jkms.2009.19.3.100" @default.
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