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자료유형
학술저널
저자정보
Şenol Bayraktar (Recep Tayyip Erdogan University) Ali Paşa Hekimoğlu (Recep Tayyip Erdogan University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.4
발행연도
2020.1
수록면
477 - 490 (14page)

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In this study, Al-5Zn, Al-15Zn, Al-25Zn and Al-35Zn alloys containing 5, 15, 25 and 35 wt% Zn, respectively were producedby permanent mold casting. Their microstructures and mechanical properties were investigated using metallographyand universal hardness and tensile tests. Cutting tests of the alloys produced were carried out in a vertical machining center. During the tests, the cutting forces were continuously measured and saved by a software. The roughness of the machinedsurfaces of the alloy samples was measured accordance with the standard of ISO 4287. It was observed that Al-(5–15)Znalloys exhibit single phase (aluminum rich α) microstructure while Al-(25–35)Zn alloys exhibit two-phase microstructureconsisting of α and zinc rich η. As the zinc content increased the hardness and tensile strength of the alloys increased, buttheir elongation to fracture decreased. Cutting force, surface roughness, formation of built-up edge (BUE) and built-uplayer (BUL), and the size of the chip occurring in the machining of the alloys decreased with increasing zinc content. Themachining of the Al-(5-35)Zn alloys with uncoated WC tools results in both lower cutting forces and better surface qualitycompared to titanium-aluminum-nitride (TiAlN) coated tools. The changes in the cutting properties of the tested alloys withthe increasing zinc content were discussed in the based on changes in structural and mechanical properties.

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