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논문 기본 정보

자료유형
학술저널
저자정보
Minhye Kang (Korea Maritime & Ocean University) Eunkyung Lee (Korea Maritime & Ocean University)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제45권 제6호
발행연도
2021.12
수록면
356 - 362 (7page)
DOI
10.5916/jamet.2021.45.6.356

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초록· 키워드

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With the growing demand for aluminum alloys, interest in recycling aluminum is increasing due to economic and environmental reasons. In order to evaluate the recyclability of machining chip scrap, microstructural analysis and tensile tests of A356 cast alloys with different scrap fraction of 0, 20, 40, 60, 80, and 100% were conducted. The secondary dendrite arm spacing increased from 26.21 to 36.34 μm as the scrap content increased. The microstructure comprised an α-Al matrix, eutectic Si, α-Al<SUB>8</SUB>Fe₂Si, β-Al<SUB>5</SUB>FeSi, and π-Al<SUB>8</SUB>Mg₃FeSi<SUB>6</SUB>, which possess similar microstructures to those of commercial A356 cast alloys. The test results showed that the size and number of pores increased with the increasing scrap content. When the scrap content was higher than 40%, the pore area fraction increased significantly up to 5.97% for 100% scrap. It was shown that increasing the scrap content decreased the average tensile strength, yield strength, and elongation to 94.34 MPa, 72.10 MPa, and 5.22%, respectively. The porosities and tensile strengths of A356 alloy without scrap content were considered to have similar values to 20% scrap contents. Pores were found on the fracture surfaces under all the conditions.

목차

Abstract
1. Introduction
2. Experimental procedure
3. Results and Discussion
4. Conclusion
References

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