http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Eco ADC12(Al-Si-Cu) 합금의 인장 및 고주기 피로 변형 거동
김관영(G. Y. Kim),김규식(K. S. Kim),김세광(S. K. Kim),윤영옥(Y. O. Yoon),이기안(K. A. Lee) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
The effects of Eco-Mg addition (0.6% and 0.8% wt%) on the microstructure development and tensile, high cycle fatigue properties of Eco-ADC 12 alloys have been investigated. Eco-ADC 12 alloys is made using Eco-Mg(Mg-Al₂Cu) in place of element Mg during the manufacture of alloy ADC 12. Microstructure analysis, tensile test, high cycle fatigue test were conducted in this study. The alloy consisted of α-Al, eutectic Si and Al₂Cu phase whit higher pore fraction. The tensile and high cycle fatigue results indicated that the fatigue strength of the Eco-ADC 12(0.8%) alloy was higher than those of the Eco-ADC12(0.6%) alloy. This study also attempted to clarify the micro-mechanism of fatigue deformation behavior related with its microstructure.
Modified 2024 알루미늄 합금의 인장 및 피로 연구
김관영(G. Y. Kim),김선호(S. H. Kim),윤영옥(Y. O. Yoon),김세광(S. K. Kim),조규상(K. S. Cho),이기안(K. A. Lee) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
In this study, the microstructures and mechanical properties of the recently developed Eco-2024-T3 alloy were examined. Eco2024 is made using Eco-Mg(Mg-Al₂Ca)in place of element Mg during the manufacture of alloy 2024-T3. This is an alloy that has economic advantage and excellent properties. Alloy Eco2024 showed smaller crystal grains that were distributed more evenly compared to the existing alloy 2024-T3. It consisted of Al matrices containing minute amounts of Al₂CuMg, Al₂Cu and Ca phases and showed microstructures with reduced amounts of Fe phases or oxide. As a result of tensile test, this alloy exhibited yield strength of 413MPA, tensile strength 527㎫, and elongation of 15.4%. In other words, it showed higher strength than the existing alloy 2024 but was similar to the existing alloy 2024 in terms of elongation. In fatigue tests, alloy Eco2024-T3 recorded fatigue limit of 330 ㎫ around 80% of its yield strength this is a much more excellent property compared to the existing alloy 2024-T3, which has fatigue limit of 250㎫. Based on the aforementioned results, the correlation between the excellent mechanical properties of alloy Eco2024-T3 and its microstructure was examined.
Mg+Al<sub>2</sub>Ca 첨가 ADC12 (Al-Si-Cu) 합금의 미세조직, 인장 및 고주기 피로 특성
김영균,김민종,김세광,윤영옥,이기안,Kim, Y.K.,Kim, M.J.,Kim, Shae K.,Yoon, Y.O.,Lee, K.A. 한국소성가공학회 2017 소성가공 : 한국소성가공학회지 Vol.26 No.5
This study investigated the microstructure, tensile strength, and high cycle fatigue properties of ADC12 aluminum alloys with different $Mg+Al_2Ca$ contents manufactured using die casting process. Microstructural observation identified the presence of ${\alpha}-Al$, eutectic Si, $Al_2Cu$, and Fe-intermetallic phases. The increase of $Mg+Al_2Ca$ content resulted in finer pore size and decreased pore distribution. Room temperature tensile strength tests were conducted at strain rate of $1{\times}10^{-3}/sec$. For 0.6%Mg ADC12, measured UTS, YS, and El were 305.2MPa, 157.0MPa, and 2.7%, respectively. For 0.8%Mg ADC12, measured UTS, YS, and El were 311.2 MPa, 159.4 MPa, and 2.4%, respectively. Therefore, 0.8% ADC12 alloy had higher strength and slightly decreased elongation compared to 0.6% Mg ADC12. High cycle fatigue tests revealed that 0.6% Mg ADC12 alloy had a fatigue limit of 150 MPa while 0.8% Mg ADC12 had a fatigue limit of 160MPa. It was confirmed that $Mg+Al_2Ca$ added ADC12 alloy achieved finer, spherical eutectic Si particles, and $Al_2Cu$ phases with greater mechanical and fatigue properties since size and distribution of pores and shrinkage cavities decreased as $Mg+Al_2Ca$ content increased.
Modified Al-Si-Mg 계 조조용 합금의 ECO-Mg 함량 변화에 따른 인장 및 피로 변형 거동
함기수(G.S. Ham),백상우(S.W. Baek),김민종(M.J. Kim),김세광(S.K. Kim),윤영옥(Y.O. Yoon),조규상(K.S. Cho),이기안(K.A. Lee) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.5
The effect of ECO-Mg addition on the microstructure, tensile and fatigue deformation behaviors of modified Al-Si-Mg casting alloy was investigated. Four different alloys having various amounts of ECO-Mg (0.3, 0.4, 1.0 and 1.5 wt.%) were prepared though sand casting process. OM microscopy, Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and X-ray Diffraction (XRD) analyses was examined as well as hardness, tensile, and fatigue tests. Modified aluminum alloy consisted of α-Aluminum (dendrite shape), eutectic Si, Mg₂Si and Fe-intermetallic phases. It was found that DAS(Dendrite Ann Spacing) gradually decreased and eutectic Si, Fe-intermetallic phases were more finely distributed in the matrix with increasing the amount of ECO-Mg. Tensile and fatigue properties were also improved with increasing ECO-Mg content. The micro-mechanisms of tensile and fatigue deformations of the alloy were also discussed based on the fractography observation results.