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냉간 가공량이 3 % 규소강판의 2차 재결정에 미치는 영향
한장섭,임호빈,원동연 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.11
Textures of new high permeability boron-silicon-iron alloys at the stage of cold worked, primary and secondary recrystallization have been investigated as a function of the final cold work in a two stage reduction method by analysis of inverse pole figure. Texture at primary recrystallized stage as well as cold worked stage consists of (222), (211) and (200) components, and the intensity of the texture increases with an increasing final cold reduction. Secondary recrystallized texture consists of (110), (222), and (211) components, and the intensity of the (110) component increases sharply with increasing the final cold reduction indicating that a texture induced inhibition, in addition to solute inhibition, plays an important role in the secondary recrystallization in boron-silicon-steels. Metallographic analysis shows that the heavier the final cold reduction the fewer the secondary nuclei and the larger the secondary grain.
SMPS와 1단 저압 임팩터를 이용한 대기 중 서브 마이크론 에어로졸 유효 밀도 측정
오재호,한장섭,박근영,황정호,Oh, Jaeho,Han, Jangseop,Park, Geunyoung,Hwang, Jungho 한국입자에어로졸학회 2019 Particle and Aerosol Research Vol.15 No.3
In this study, a serial methodology is presented for estimating the effective density of ambient sub-micron aerosol employing lab-made 1 stage low-pressure impactor of Hyun et al. (2015) and SMPS (Scanning Mobility Particle Sizer) together. The effective density from this methodology (Impactor+SMPS) was compared with another methodology (BAM+SMPS) for estimating the effective density employing BAM (Beta-Attenuation Monitor) and SMPS. As a result, the effective density obtained with impactor+SMPS ranged from $0.42g/cm^3$ to $2.36g/cm^3$, while the effective density obtained with BAM+SMPS ranged from $1.01g/cm^3$ to $1.72g/cm^3$. The difference between these results might be caused by the particle loss in the impactor.