http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
액체열 노화조건에 따르는 단섬유 강화 나일론의 기계적 성질 변화
이인섭(I. S. Lee),이동주(D. J. Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.8
The hygrothermal ageing of short-glass fiber reinforced nylon composites in pure water and sodium chioride solution were investigated as functions of temperature(25℃, 75℃ and 100℃), injection conditions and sodium chloride concentration. Also, the mechanical properties and recovery ratio depending on absorption-desorption-reabsorption-redesorption cycle were investigated. In general, it is found that there is linear relationship between moisture absorption and mechanical properties, the mechanical properties is recovered with moisture desorption in nylon composites. Also, it is found that variation of mechanical properties is small when the water absorption is small.
자동차용 페라이트계 스테인리스강의 고온인장성질에 미치는 합금원소의 영향
송전영(J. Y. Song),이인섭(I. S. Lee),안용식(Y. S. Ahn) 한국동력기계공학회 2010 동력시스템공학회지 Vol.14 No.1
Ferritic stainless steel is currently increasingly used for automotive exhaust material. The material for exhaust manifold is used in the temperature range of 500∼850℃. Therefore, high temperature characteristic is an important one that affects it's life span. It has been investigated the effect of alloying elements of Cr, Mo, Nb, Ti in the ferritic stainless steel for exhaust manifold on the high temperature tensile strength. There was a few difference in the tensile strength at 600℃ with the exception of low Cr steel, but the steels containing higher Cr, Mo or Nb elements showed significantly higher tensile strength at the temperature of 800℃. The precipitates of the specimens after heat treating at the test temperature were electrolytic extracted, and quantitatively analysed using by SEM-EDS and TEM. The alloying elements of Cr and Mo increased the tensile strength as a solid solution strengthener, and on the other hand Nb element enhanced the strength by forming the fine intermetallic compounds such as NbC or Fe₂Nb.