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RISS 인기검색어
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- 저자 : 윤태진(Tae Jin Yun) (검색결과 125 건)
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A5J32/A5052 이종 알루미늄 합금 겹치기 마찰교반접합부의 인장성질에 미치는 재료배열 및 접합조건의 영향
윤태진,강명창,강정윤,Yoon, Tae-Jin,Kang, Myung-Chang,Kang, Chung-Yun 한국분말야금학회 2013 한국분말야금학회지 Vol.20 No.4
A5J32-T4 and A5052-H32 dissimilar aluminum alloy plates with thickness of 1.6 and 1.5 mm were welded by friction stir lap welding (FSLW). The FSLW were studied using different probe length tool and various welding conditions which is rotation speed of 1000, 1500 rpm and welding speed of 100 to 600 mm/min and material arrangement, respectively. The effects of plunge depth of tool and welding conditions on tensile properties and weld nugget formation. The results showed that three type nugget shapes such as hooking, void, sound have been observed with revolutionary pitch. This plunge depth and material arrangement were found to effect on the void and hooking formation, which in turn significantly influenced the mechanical properties. The maximum joint efficiency of the FSLWed plates was about 90% compared to base metal, A5052-H32 when the A5052-H32 was positioned upper plate and plunge depth was positioned at near interface between upper and lower plates.
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KS5J32 Al합금 마찰교반접합부의 인장성질에 미치는 접합조건의 영향
윤태진,김상주,김남규,송상우,강정윤,Yoon, Tae-Jin,Kim, Sang-Ju,Kim, Nam-Kyu,Song, Sang-Woo,Kang, Chung-Yun 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.5
The effect of welding condition on tensile properties of KS5J32 Al Alloy was investigated under various welding conditions. The 1.6 mm thick KS5J32 alloy sheets were joined by friction stir welding (FSW) technique with butt joint. The tool rotation speeds were 1000, 1250 and 1500 rpm, and the welding speeds were varied within the range from 100 to 600 mm/min. Voids mainly occurred at the advancing side of the tool probe, when the tool rotation speed was low, due to insufficient materials flow. When the weld pitch exceeded 0.4 mm/rev, voids were observed under all welding conditions and the area of voids increased with increasing weld pitch. For void-free specimens, fracture always occurred at base materials. However voids affected the location of fractures, base metal or welded zone, when the voids existed within the welds.
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이종 알루미늄 합금 A6K31/A5J32 겹치기 마찰교반 접합부의 인장성질에 미치는 접합조건의 영향
윤태진,김상주,송상우,홍재근,강정윤,Yoon, Tae-Jin,Kim, Sang-Ju,Song, Sang-Woo,Hong, Jae-Keun,Kang, Chung-Yun 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.2
The scope of this investigation is to evaluate the effect of joining parameters on the microstructural features and mechanical properties of dissimilar aluminum alloys, 1mm-thickness fixing AA6K31 at the top position and fixing AA5J32 at the bottom position. The friction stir lap welds were studied under various welding conditions, rotation speed of 1000, 1250, 1500rpm and welding speed of 100, 300, 500, 700mm/min, respectively. Mechanical test has been investigated in terms of tensile shear test and hardness test. The results showed that three type nugget shapes such as onion ring, zigzag type, hooking with the void, have been observed with revolutionary pitch. All welding conditions fractured at the HAZ of top plate, A6K31 and also the strength compare with base metal of lap joints were low efficiency, 52~63%. The thickness of fractured position was decreased with the lower heat input conditions. The relationships were excellent due to linear between the effective thickness of fractured position and peak load. The fractured position was the interface between joint area and not joint area. Also the strength efficiency compared with base metal was lower than decreasing rate of thickness because the hardness was decreased at fractured position due to softened material.
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W92-Ni-Fe 소결툴을 이용한 Cu-Ni 합금의 용접부미세조직과 경도 특성
윤태진,박상원,강명창,노중석,정성욱,강정윤,Yoon, Tae-Jin,Park, Sang-Won,Kang, Myung-Chang,Noh, Joong-Suk,Chung, Sung-Wook,Kang, Chung-Yun 한국분말야금학회 2015 한국분말야금학회지 Vol.22 No.3
In this study, the effect of the friction stir welding (FSW) was compared with that of the gas tungsten arc welding (GTAW) on the microstructure and microhardness of Cu-Ni alloy weldment. The weldment of 10 mm thickness was fabricated by FSW and GTAW, respectively. Both weldments were compared with each other by optical microstructure, microhardness test and grain size measurement. Results of this study suggest that the microhardness decreased from the base metal (BM) to the heat affected zone (HAZ) and increased at fusion zone (FZ) of GTAW and stir zone (SZ) of FSW. the minimum Hv value of both weldment was obtained at HAZ, respectively, which represents the softening zone, whereas Hv value of FSW weldment was little higher than that of GTAW weldment. These phenomena can be explained by the grain size difference between HAZs of each weldment. Grain size was increased at the HAZ during FSW and GTAW. Because FSW is a solid-state joining process obtaining the lower heat-input generated by rotating shoulder than heat generated in the arc of GTAW.
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수술 전 청색증 정도에 따른 성인 활로씨 4징증의 임상 양상
윤태진(Tae-Jin Yun),김상화(Sang-hwa Kim),박순익(Soon-Ik Park),박정준(Jung-Jun Park),송현(Hyun Song),이재원(Jae-Won Lee),서동만(Dong-Man Seo),송명근(Meong-Gun Song),송종민(Jong-Min Song),강덕현(Duck-Hyun, Kang),송재관(Jae-Kwan Song) 대한흉부외과학회 2005 The Korean Journal of Thoracic and Cardiovascular Vol.38 No.4
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성인 선천성 심기형에 동반된 삼첨판막 폐쇄부전의 판막륜 성형술 후 중기성적
윤태진(Tae-Jin Yun),김상화(Sang-hwa Kim),이준완(Jun-Wan Lee),박정준(Jeong-Jun Park),송현(Hyun Song),이재원(Jae-Won Lee),서동만(Dong-Man Seo),송명근(Meong-Gun Song),송종민(Jong-Min Song),강덕현(Duck-Hyun Kang),송재관(Jae-Kwan Song),장 대한흉부외과학회 2003 The Korean Journal of Thoracic and Cardiovascular Vol.36 No.3
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