http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hydrogen permeation characteristics of rolled V85Al10Co5 alloys
에릭플러리,서진유,김동익,정찬훈,박정훈 한국물리학회 2012 Current Applied Physics Vol.12 No.4
Thin sheets of V85Al10Co5 alloy were produced by a thermo-mechanical treatment consisting in successive hot rolling, cold rolling steps and annealing treatment at high temperature followed by either air cooling or water quenching. Though the values of hydrogen permeability measured for these sheets were significantly reduced as a consequence of the rolling process, the annealing treatment restored almost the hydrogen permeation properties to those of the alloy in the cast condition. EBSD analyses suggested that the post-annealing treatment performed at 1100 ℃ for 3 min after cold rolling induced a recrystallization of the grains resulting in a preferred orientation along the {002} planes. For the sample annealed and water quenched, the value of the hydrogen flux reached about 45 ml/cm2.min, which is more than twice the value of the flux obtained for thin foils of Pd alloys tested under identical conditions.
소형펀치실험을 이용한 CrMo강의 인장 및 연취성천이특성의 평가
에릭플러리,하정수,Ha, Jeong-Su 한국재료학회 1998 한국재료학회지 Vol.8 No.2
사용중인 중화학 설비의 재료물성의 경년열화적 특성을 평가하기 위하여 기존 실험법의 인장시험편이나 충격시험편을 채취하기는 실제적으로 불가능하다. 인장강도등 인장특성과 비교한 결과 인장강도, 연신율, 항복강도, 종탄성계수와 소형펀치실험의 각 특성과 선형적 관계를 얻을 수 있었다. 또한 경년열화도를 평가하는 두구인 파면천이온도(FATT)와 비교하기 위하여 저온 소형펀치실험을 실시한 결과 충격실험을 통하여 구한 FATT온도와 소형펀치실험의 천이온도 ( $T_{sp}$ )와 일정한 관계가 있음이 밝혀져 사용재의 열화도를 평가할 수 있다.
High Temperature Mechanical Properties of Rapidly Quenched Zr50Ni27Nb18Co5 Amorphous Alloy
S. Jayalakshmi,에릭플러리 대한금속·재료학회 2009 METALS AND MATERIALS International Vol.15 No.5
The high temperature mechanical properties of Zr50Ni27Nb18Co5 amorphous ribbons, proposed as metallic membrane material for hydrogen purification are presented. The mechanical behavior of the amorphous alloy, which generally does not exhibit a super-cooled liquid region, can be categorized into varying temperature regimes. A strain rate dependent phenomenon was observed between 425 °C < T < 490 °C in the strain rate range of 10−6 s−1 to 10−2 s−1 . However, the alloy did not exhibit Newtonian-flow characteristics at the varied test temperature and strain rate range employed in this study. Detailed analyses indicated that in these temperature regimes structural changes occur, resulting in the formation of nanocrystalline phases. The results from these mechanical tests corroborated with the microstructural changes that occurred at these temperatures/ strain rates. The high temperature mechanical properties of Zr50Ni27Nb18Co5 amorphous ribbons, proposed as metallic membrane material for hydrogen purification are presented. The mechanical behavior of the amorphous alloy, which generally does not exhibit a super-cooled liquid region, can be categorized into varying temperature regimes. A strain rate dependent phenomenon was observed between 425 °C < T < 490 °C in the strain rate range of 10−6 s−1 to 10−2 s−1 . However, the alloy did not exhibit Newtonian-flow characteristics at the varied test temperature and strain rate range employed in this study. Detailed analyses indicated that in these temperature regimes structural changes occur, resulting in the formation of nanocrystalline phases. The results from these mechanical tests corroborated with the microstructural changes that occurred at these temperatures/ strain rates.
1Cr1Mo1/4V 터빈 로터강의 크리프 손상 모델에 관한 연구
최우성(Woo Sung Choi),에릭플러리(Eric Fleury),송기욱(Gee Wook Song),김범신(Bum Shin Kim),장성호(Sung Ho Chang) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.4
일반적으로 화력발전 터빈 로터나 케이싱과 같이 고온 고압에서 운전되는 설비의 경우 크리프 및 피로 손상이 주된 손상기구로 알려져 있다. 터빈 설비의 수명을 정확하게 예측하기 위해서 크리프 및 피로 손상 기구를 복합적으로 고려해야 하지만 500MW 급 대용량 터빈 설비의 경우 기저 부하를 담당하기 때문에 기동횟수가 많지 않고 고온에서 장시간 동안 안정적인 운전을 하므로 잔여수명을 결정할 때 크리프 수명을 주로 사용한다. 국내에서 20 년 넘게 운전되고 있는 대용량 터빈의 경우 대부분 니켈, 크롬, 몰리브덴, 바나듐 성분이 포함한 재료로 되어 있다. 본 논문에서는 대용량 터빈의 크리프 수명을 예측하기 위하여 1Cr1Mo1/4V 터빈 로터강에 대한 크리프 손상 모델을 제안하고자 한다. It is well known that the dominant damage mechanisms in high-temperature steam turbine facilities such as rotor and casing are creep and fatigue damages. Even though coupling of creep and fatigue should be considered while predicting the life of turbine facilities, the remaining life of large steam turbine facilities is generally determined on the basis of creep damage because the turbines must generate stable base-load power and because they are operated at a high temperature and pressure for a long time. Almost every large steam turbine in Korea has been operated for more than 20 years and is made of steel containing various amounts of principal alloying elements nickel, chromium, molybdenum, and vanadium. In this study, creep damage model of 1Cr1Mo1/4V steel for turbine rotor is proposed and that can assess the high temperature creep life of large steam turbine facilities is proposed.
The Effect of Crystallization Behavior on the Plasticity of Cu43Zr43Al7Ag7 Bulk Metallic Glass
Sang Ok Park,김유찬,에릭플러리,Jae Chul Lee,안재평,차필령 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.2I
The effect of the early crystallization behavior on the plasticity of a Cu43Zr43Al7Ag7 bulk metallic glass alloy has been investigated using differential scanning calorimeter and high-resolution transmission electron microscope. An Ag-riched amorphous phase formed by phase separation is crystallized first and is characterized by a low activation energy for crystallization. The large plasticity of the Cu43Zr43Al7Ag7 alloy observed during compression test can be explained by the formation of Ag-rich nanocrystals induced by deformation.