Browsing by Author "Akkas, M"
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Web of Science Assessing the Impact of Data Sciences and Smart Technologies in Air Conditioning Project Management: A Delphi Method Analysis within the Construction Industry(2023.01.01) Ali, BM; Akkas, MThe integration of data sciences and smart technologies in the construction industry, particularly in air conditioning project management, is an important area of research. This study employs the Delphi Method to explore this integration, surveying 40 experts in construction management. Participants were meticulously selected based on a set of inclusion criteria related to age, educational qualifications, and field experience. The study tests five hypotheses, each scrutinized through a score-based Delphi analysis. The findings are mixed and shed new light on several dimensions of air conditioning project management. For instance, the study refutes the commonly held belief that the location of air conditioning projects significantly impacts worker safety. It also challenges the assumption that exceeding international safety standards like ISO leads to cost savings. On the other hand, the study validates the significance of global safety standards and the undeniable role of data sciences and smart technologies in enhancing human safety in the air conditioning industry. These findings not only challenge existing models, but also open avenues for further research. They indicate a complex interplay between safety, cost-effectiveness, and technological integration in air conditioning project management. The study suggests a shift towards data-driven decision-making and underscores the need for international safety standards, particularly in an era marked by rapid technological advancements and globalization.Web of Science EFFECT OF BORON ON MICROSTRUCTURE AND MICROHARDNESS PROPERTIES OF MO-SI-B BASED COATINGS PRODUCED VIA TIG PROCESS(2016.01.01) Islak, S; Ozorak, C; Sezgin, CT; Akkas, MWeb of Science Effect of Hot Pressing and Reinforcement of TiC and WC on the Mechanical Properties and Microstructure of AlCuFeCrNi HEAs Alloy(2021.01.01) Akkas, M; Al Sudani, FRAWeb of Science INVESTIGATION OF GAS PRESSURE EFFECT ON POWDER CHARACTERIZATION OF AZ31 ALLOY PRODUCED BY GAS ATOMIZATION METHOD(2019.01.01) Akkas, M; Em Kara, KM; Cetin, T; Boz, MWeb of Science Web of Science 'Investigation of the effect of gas pressure on powder characterization of AM60 magnesium alloy powder produced by gas atomization method(2020.01.01) Cetin, T; Akkas, M; Boz, MWeb of Science Microstructural and Mechanical Properties of Ti-B4C/CNF Functionally Graded Materials(2022.01.01) Gariba, AMM; Islak, S; Hraam, HRH; Akkas, MWeb of Science Microstructure and Mechanical Properties of Ni Matrix B4C Reinforced Functionally Graded Composites(2021.01.01) Caligulu, U; Durmus, H; Akkas, M; Sahin, BWeb of Science MICROSTRUCTURE CHARACTERIZATION OF WCCo-Mo BASED COATINGS PRODUCED USING HIGH VELOCITY OXYGEN FUEL(2015.01.01) Islak, S; Kir, D; Buytoz, S; Ozorak, C; Akkas, M; Caligulu, U; Yildirim, MMWeb of Science Microstructure, Wear and Corrosion Properties of NiB-TiC Composite Materials Produced By Powder Metallurgy Method(2019.01.01) Akkas, M; Islak, SPublication Production and characterization of boron carbide and silicon carbide reinforced copper-nickel composites by powder metallurgy method(2021-01-01) Akkaş M.; Akkas, MIn this study, composite samples were produced by reinforcing boron carbide and silicon carbide particles in different rates by weight into copper-nickel powder mixture using powder metallurgy method. The prepared powder mixtures were cold pressed under 600 MPa pressure and pelletized. The pelletized samples were then sintered in an atmosphere-controlled furnace. Scanning electron microscopy to determine the microstructure of the produced samples and x-ray diffraction method analysis to determine the phases forming in the structure of the produced samples were used and microhardness was taken to determine the effect of boron carbide and silicon carbide on hardness. In addition to that, the mechanical properties the transverse rupture strength were investigated using three-point bending tests. The corrosion tests were performed potentiodynamic polarization curves of the samples in 3.5 % sodium chloride solution. The highest hardness value was measured as 162 HV 0.05 in the sample reinforced with 10 % boron carbide. As the amount of silicon carbide increased, the corrosion resistance of the composite increased. Moreover, as the amount of boron carbide increased, the corrosion resistance of the composite decreased. Load-contact depth values were examined, copper-nickel+10 % silicon carbide has the highest peak depth of 48.12.Web of Science The Effect of CNT Content and Sintering Temperature on Some Properties of CNT-reinforced MgAl Composites(2017.01.01) Islak, S; Kucuk, O; Eski, O; Ozorak, C; Akkas, MWeb of Science THE EFFECT OF GAS PRESSURE ON POWDER SIZE AND MORPHOLOGY IN THE PRODUCTION OF AZ91 POWDER BY GAS ATOMIZATION METHOD(2018.01.01) Akkas, M; Cetin, T; Boz, MPublication The mechanical and corrosion properties of WCCo-Al coatings formed on AA2024 using the HVOF method(2020-07-01) Akkaş M.; Akkas, MThis paper investigates the microstructural, mechanical, and electrical-conductivity properties of WCCo-Al composite coatings produced on the Al alloy AA2024 using the high-velocity oxygen fuel (HVOF) thermal-spray method. In an experimental study, the amount of WCCo added to Al powders was varied between 25, 50, 75, and 100 wt%. The AA2024 used as the substrate material was cleaned in acetone solution and then subjected to a sanding process using Al2O3 sand that had a grain size of 24-35 mesh for improved bonding of the coating layer. Nitrogen was used as the powder-carrier gas. After the coating process, the substrates were cooled using high-pressure air jets. The coated samples were then compared in terms of their microstructure, phase composition, microhardness, electrical conductivity, and wear properties. The microstructure, phase composition, and surfaces of the coatings after abrasion were examined using a scanning electron microscope (SEM) and an x-ray diffractogram (XRD). The XRD results showed that the WCCo-Al coating layer was composed of Al, Al0.52Co0.48, Al30Mg23, Al0.47Co0.53, MgCuAl2, WCu2Al8, AlCo, Al12W, and BNi2 phases. The addition of WCCo increased the hardness of the coatings. For instance, the highest hardness value was measured as 1,335 HV0.2 in the coating produced using 100% WCCo. The amount of WCCo in the powder also affected the microstructure, phase composition, and hardness of the coatings. Moreover, the addition of WCCo lowered the electrical conductivity, wear rates, and friction coefficients of the coatings. In indentation tests, the hardness values of the coatings were generally found to increase with increasing applied load. In corrosion tests, the corrosion resistance of the coatings was observed to increase as the amount of WCCo in the coating layer increased. The highest peak depth was 36.94 μm in the sample coated with 100% Al, and the lowest peak depth was 6.82 μm in the sample coated with 100% WCCo. The coated materials had outstanding tribological performance compared to the uncoated ones. The increase in wear resistance provided by the coating was caused by a large amount of dispersed WC and Co.Web of Science Web of Science The Production of AZ31 Alloys by Gas Atomization Method and Its Characteristics(2020.01.01) Akra, KME; Akkas, M; Boz, M; Seabra, E