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임창동 ( Chang Dong Yim ),김영민 ( Young Min Kim ),박성혁 ( Sung Hyuk Park ),유봉선 ( Bong Sun You ) 대한금속재료학회(구 대한금속학회) 2012 대한금속·재료학회지 Vol.50 No.9
One of the barriers limiting wide applications of magnesium alloys to various industries is their poor corrosion resistance. The corrosion properties of AZ91 magnesium alloy, which is the most popular magnesium casting alloy, are affected by microstructural and environmental factors. The corrosion properties of AZ91 magnesium alloy are affected by the corrosion properties of α-Mg and β phases, the volume fraction and distribution of β phase and area ratio of α-Mg/β phases. The corrosion properties of AZ91 magnesium alloy under various environments also change according to the passivity of films and types of corrosion products formed on its surface. The corrosion resistance of the magnesium alloys can be improved by microstructural control through the addition of alloying elements and optimization of the production process.
홍성현,배종수,임창동,나영상,송명엽,Hong, Seong-Hyeon,Bae, Jong-Soo,Yim, Chang-Dong,Na, Young-Sang,Song, Myoung-Youp 한국수소및신에너지학회 2006 한국수소 및 신에너지학회논문집 Vol.17 No.2
The eutectic Mg-23.5%Ni alloy was casted by melting and solidification. The powders of Mg-23.5%Ni and (Mg-23.5%Ni)-10% iron oxide were prepared by mechanical grinding of casted Mg-Ni alloy and casted Mg-Ni alloy+oxide, respectively. As milling time increases, hydriding and dehydriding rates of Mg-Ni and Mg-Ni-oxide alloy powders increase. The additions of iron oxide to Mg-Ni alloy and Mg-Ni-oxide increase hydriding rates and slightly decrease dehydriding rates.
AZ31-xCa (x=0, 0.7, 2.0 wt.%) 압출재의 압축변형시 파괴거동
강나은 ( Na Eun Kang ),임창동 ( Chang Dong Yim ),유봉선 ( Bong Sun You ),박익민 ( Ik Min Park ) 대한금속·재료학회 2010 대한금속·재료학회지 Vol.48 No.1
The plastic deformation behavior of magnesium alloy is affected simultaneously by deformation temperature and strain rate under warm and/or hot working conditions. The soundness of deformation of AZ31-xCa (x=0. 0.7, 2.0 wt.%) extrudes during compression was strongly affected by processing variables including deformation temperature, strain rate. compression-loading direction, which was related to the activation of available deformation systems. The deformation behavior of AZ31-xCa extrudes was also affected by Ca content, which was related to the change of the sort and fraction of second phase. The complex effects of deformation temperature and strain rate on the deformation behavior of AZ31-xCa extrudes during compression under various conditions could be successfully described by Zener-Hollomon parameter.