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자료유형
학술저널
저자정보
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제33권 제1호
발행연도
2009.1
수록면
104 - 111 (8page)

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This paper shows the behaviors of macro- and micro-structures and mechanical properties for specimen‘s welding region welded by FSW. according to welding conditions with 5mm thickness aluminum 5083O alloy plate. It apparently results in defect-free weld zone in case traverse speed was changed to 32 ㎜/min under conditions of anti-clockwise direction and tool rotation speed such as 800 and 1250 rpm with tool's pin diameter of 5 Φ㎜ and shoulder diameter of 20 Φ㎜, pin length of 4.5 mm and tilting angle of 2°. The ultimate stress of σ<SUB>T</SUB>=331 MPa and the yield point of 147 ㎫ are obtained at the condition of the travel speed of 32 ㎜/min with the tool rotation speed of 1250 rpm. There is neither voids nor cracks on bended surface of 180° after bending test. The improvement of toughness after impact test was found. The lower rotating and traverse speed became, the higher were yield point, maximum stress and elongation (%) with the stresses and the elongation (%) versus the traverse speed diagram. Vickers hardness for cross section of welding zone were also presented. The typical macro-structures such as dynamically recrystallized zone, thermo-mechanically affected zone and heat affected zone and the micro-structures of the transverse cross-section were also showed. However, the author found out that the region of 6㎜ far away from shoulder circumference was affected by friction heat comprehensively, that is, hardness softened and that part of micro-structures were re-solid-solution or recrystallized. the author also knew that there is no mechanically deformation on heat affected zone but there are the flow of plastic deformation of 45° direction on thermo-mechanically affected zone and the segregation of Al-Mg on nugget. The solid solution wt (%) of parent material as compared against of friction stir welded zone was comprehensively changed.

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Abstract
1. 서론
2. 실험재료 및 실험방법
3. 시험결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-559-015793141