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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 양성모
- 발행연도
- 2016
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이 논문의 연구 히스토리 (3)
2016
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초록· 키워드
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Studies have been made actively in order to suppress the weight reduction of nitrogen oxides, carbon dioxide from transportation equipment like vehicle, rail, ship and air Among the various causes of environmental problems. Structures of Al-Mg alloys light metal which can reduce the weight without reducing significantly the strength are often used in the design.
Al-Mg alloys are the attributes that formability, and workability is excellent, but when the strength is greatly reduced by the molten weld heat affected zone of increased brittleness. As a new technology to solve the problem, the solid phase bonding process during melt welding Friction Stir welding(FSW) technology has been widely applied in recent years, light weight Al-Mg alloys welding. there have been testes to evaluate the mechanical properties such as one axis tensile test and vickers hardness etc. For this reason, Small punch test(SP test) to evaluate local structure such as heat affect zone(HAZ) and thermo-mechanical affect zone(TMAZ) was used in this study.
In this paper, after using a 6mm Al 6061-T6 alloy welding carried out by the three kinds of feed rate, we will look at the nature of the FSW welds nine points. 9 kinds of positions are advancing side(AS), retreating side(RS) and Weld center, and on top of that part, middle, bottom will also be studied. You will get a load displacement graph by the Micro small punch test(MSP). in addition, the maximum load, equivalent strain and fracture energy will be calculate using load displacement graph. Considering maximum load and fracture energy of optimal condition is appeared to feed speed 270mm/min.
Al-Mg alloys are the attributes that formability, and workability is excellent, but when the strength is greatly reduced by the molten weld heat affected zone of increased brittleness. As a new technology to solve the problem, the solid phase bonding process during melt welding Friction Stir welding(FSW) technology has been widely applied in recent years, light weight Al-Mg alloys welding. there have been testes to evaluate the mechanical properties such as one axis tensile test and vickers hardness etc. For this reason, Small punch test(SP test) to evaluate local structure such as heat affect zone(HAZ) and thermo-mechanical affect zone(TMAZ) was used in this study.
In this paper, after using a 6mm Al 6061-T6 alloy welding carried out by the three kinds of feed rate, we will look at the nature of the FSW welds nine points. 9 kinds of positions are advancing side(AS), retreating side(RS) and Weld center, and on top of that part, middle, bottom will also be studied. You will get a load displacement graph by the Micro small punch test(MSP). in addition, the maximum load, equivalent strain and fracture energy will be calculate using load displacement graph. Considering maximum load and fracture energy of optimal condition is appeared to feed speed 270mm/min.
목차
제 1 장. 서론 11-1. 연구배경 및 목적 11-2. 마찰교반용접기술 개요 31-3. 연구동향 71-3-1. 국내 연구동향 71-3-2. 국외 연구동향 81-4. 이론적 배경 10제 2 장. 실험재료 및 실험방법 152-1. 실험재료 152-2. 시험편 제작 172-2-1. 마찰교반용접 172-2-2. 시험편제작 182-3. Micro small punch 시험 28제 3 장. 실험결과 및 고찰 343-1. 하중-변위 거동 및 최대하중 거동 343-2. 등가파괴변형률 거동 413-3. 파괴에너지 거동 44제 4 장. 결론 49참고문헌 50
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