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IŞIK, YAHYA

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IŞIK

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2015 - 201912020 - 20211
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    Publication
    Influence of cutting parameters on the chip-tool interface temperature during the turning of Waspaloy
    (Carl Hanser Verlag, 2015-09-01) Işık, Yahya; Kuş, Abdil; Çakır, Mustafa Cemal; IŞIK, YAHYA; KUŞ, ABDİL; ÇAKIR, MUSTAFA CEMAL; Teknik Bilimler Meslek Yüksekokulu; Makine Mühendisliği Bölümü; AAG-9412-2021; FBP-1850-2022; HOR-0562-2023
    Waspaloy, as a nickel superalloy, is a difficult-to-machine material used for gas turbine engine components that require considerable strength and corrosion resistance at high operating temperatures. The machining of nickel-based alloys generates high temperatures at the cutting tool edge. This research investigated the relationship between cutting parameters and cutting temperature, using a remote temperature measurement method employing an infrared thermometer. In addition, the effects of cutting parameters on surface roughness were examined. Experiments were conducted on Waspaloy AMS5708 superalloy samples and a PVD TiAlN-TiN-coated WNVG 080404-IC907 carbide insert was used during the turning process. It was observed that the highest cutting speed and highest feed rate generated higher temperatures and higher surface roughness. Better surface roughness was obtained with the lowest feed rate, the highest cutting speed and the higher cutting depth. No cutting fluid was used in the experiments.
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    Optimum structural design of seat frames for commercial vehicles
    (Walter De Gruyter Gmbh, 2021-01-01) Işık, Yahya; Göle, Mücahit; IŞIK, YAHYA; Mühendislik Fakültesi
    Seat frames in commercial vehicles generally consist of components such as foot brackets, seats, back, head restraints and fasteners. In addition to mechanical properties, comfort is another important parameter. This study aims to reduce the cost of a commercial vehicle by means of alternative materials and design changes in the passenger seat frame. For this purpose, three different methods were used to optimize seat back pipes: reducing the cross-section, using thinner sections in the seat frame via alternative material and making design changes in the foot brackets. In the methods applied, mitigation and cost reductions were achieved. The suitability of the design changes in the seat through geometric changes was confirmed by international ECE R14 test results and finite element method analyses.