Department of Metallurgical and Materials Engineering, Article

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Effect of Y Addition on the Structural Properties and Oxidation Behavior of Fe60Al40-nYn Alloys (n=1, 3, and 5 at.%) Yildirim, Mehmet; Atas, Mehmet Sahin; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2022-04-01) The influence of Y addition on the microstructural features, phase relationships, hardness, magnetic behaviour and cyclic oxidation performance of Fe60Al40-nYn alloys (n = 1, 3, and 5 at.%) has been examined in detail. Al8...
In-situ radiation response of additively manufactured modified Inconel 718 alloys Aydoğan Güngör, Eda; El-Atwani, O.; Erdem, B.; Li, M.; Devaraj, A.; Koc, B.; Chen, W. -Y.; Maloy, A. (2022-03-01) In this study, a novel alloy of modified Inconel 718 produced by laser powder bed fusion is studied before and after in-situ Kr irradiation up to 3 dpa at 200 and 450 degrees C. Before irradiation, the microstructure consi...
Selective laser melting of Nano-TiN reinforced 17-4 PH stainless steel: Densification, microstructure and mechanical properties Ozsoy, Andac; Aydoğan Güngör, Eda; Dericioğlu, Arcan Fehmi (2022-03-01) In this study, TiN-reinforced 17-4 PH stainless steel was produced by selective laser melting (SLM). It was aimed to utilize nano-sized TiN particles both as inoculants to obtain an equiaxed microstructure in as-built cond...
Microwave-assisted in situ laser dye incorporation into high sensitivity whispering gallery mode microresonators Mondragon-Ochoa, Jesus S.; Gonzalez-Rivera, Jose; Toparlı, Çiğdem; Khanum, Rizwana; Moirangthem, Rakesh S.; Duce, Celia; Ferrari, Carlo; Barillaro, Giuseppe; Erbe, Andreas (2022-02-01) Optical whispering gallery mode microresonators (WGM-mu Rs) are powerful sensitive components with many analytical applications. Here, spherical WGM-mu Rs have been synthesised in a single-step microwave (MW)-assisted hete...
Scalable, microwave-assisted decoration of commercial cotton fabrics with binary nickel cobalt sulfides towards textile-based energy storage Hekmat, Farzaneh; Balim, Umur; Ünalan, Hüsnü Emrah (2022-02-01) High-performance textile-based energy storage systems with high energy and power densities alongside remarkable cyclic life are always at the leading edge of wearable electronics. Herein, commercial cotton fabrics (CCFs) a...
Radiation effect studies on partially crystalline bulk amorphous Fe-based metallic glass Kiceci, Pelin Uslu; Akdeniz, Mahmut Vedat; Demirköz, Melahat Bilge; Mehrabov, Amdulla (2022-02-01) The selection of appropriate materials for radiation environments is critical due to the harsh and aggressive conditions found in such environments, which are liable to degrade material properties. Therefore, durability of...
Complete chemical and structural characterization of selenium-incorporated hydroxyapatite Alkan, Baris; Durucan, Caner (2022-01-01) Hydroxyapatite (HAp) has long been used as synthetic bone tissue replacement material. Recent advances in this area have led to development of dual-functional bioceramics exhibiting high biocompability/osteoconductivity to...
Recovery of Iron from Turkish and Iranian Red Muds Eray, Said; Keskinkılıç, Ender; Topkaya, Yavuz Ali; Geveci, Ahmet (2022-01-01) Turkish and Iranian red mud samples of different composition and mineralogy were processed by solid-state reduction followed by wet magnetic separation and smelting, two commonly used pyrometallurgical methods for iron rec...
Development of AZO TCOs with ALD for HEMT and HJSC Solar Cell Applications Tugrul, Deniz; Cakmak, Huseyin; Özbay, Ekmel; İmer, Muhsine Bilge (2021-12-01) Transparent Conductive Oxide (TCO) films are widely used in optoelectronic devices, such as solar cells, LEDs, and Lasers. Utilization of these contacts directly affects the device efficiencies. Purpose of this study is to...
Grain size stabilization of oxide dispersion strengthened CoCrFeNi-Y(2)O3 high entropy alloys synthesized by mechanical alloying Tekin, Mustafa; Polat, Gokhan; Kalay, Yunus Eren; KOTAN, HASAN (2021-12-01) Nanocrystalline CoCrFeNi high entropy alloys (HEAs) with 1 and 4 wt% nanosized Y2O3 were synthesized by high energy mechanical alloying and subjected to annealing treatments at different temperatures up to 1100 degrees C. ...
A Comparative Analysis of Ternary Element Addition on Corrosion Behavior of Aluminide Coatings in Harsh Environmental Conditions Erturk, Umutcan; İmer, Muhsine Bilge (2021-11-01) Increasing hot corrosion durability of aluminide coatings is important to extend the life-time of turbine blades. The addition of hafnium, yttrium, zirconium, chromium, platinum and cobalt improves performance of aluminide...
Fabric based wearable triboelectric nanogenerators for human machine interface Doğanay, Doğa; Çiçek, Melih Ögeday; Durukan, Mete Batuhan; Ünalan, Hüsnü Emrah (2021-11-01) Electronic textiles received significant attention with the advancements in materials for wearable electronics. Lack of washing stability and the need for an external power source for wearable electronics are the two major...
Predicting nepheline precipitation in waste glasses using ternary submixture model and machine learning Lu, Xiaonan; Sargın, Irmak; Vienna, John D. (2021-11-01) Nepheline precipitation in nuclear waste glasses during vitrification can be detrimental due to the negative effect on chemical durability often associated with its formation. Developing models to accurately predict nephel...
Effects of heat input on metallurgical behavior in HAZ of multi-pass and multi-layer welded IN-939 superalloy Mashhuriazar, Amirhossein; Gür, Cemil Hakan; Sajuri, Zainuddin; Omidvar, Hamid (2021-11-01) The hot components of a gas turbine are susceptible to damage in the high-temperature environment of turbine engine operation. Given that these components are relatively costly to manufacture, they are often repaired than ...
Synthesis of Graphene-MoS2 composite based anode from oxides and their electrochemical behavior Sarwar, Saira; Karamat, Shumaila; Saleem Bhatti, Arshad; Aydınol, Mehmet Kadri; Oral, Ahmet; Hassan, Muhammad Umair (2021-10-16) High energy storage capacity and longer life span make rechargeable Li-ion batteries the first choice in portable electronics. Here, a graphene-MoS2 composite material is investigated as a potential electrode material whic...
Stable, Ductile and Strong Ultrafine HT-9 Steels via Large Strain Machining El-Atwani, Osman; Kim, Hyosim; Gigax, Jonathan G.; Harvey, Cayla; Aytuna, Berk; Efe, Mert; Maloy, Stuart A. (2021-10-01) Beyond the current commercial materials, refining the grain size is among the proposed strategies to manufacture resilient materials for industrial applications demanding high resistance to severe environments. Here, large...
Enhancement of the Thermal Energy Storage Using Heat-Pipe-Assisted Phase Change Material Behi, Hamidreza; Behi, Mohammadreza; Ghanbarpour, Ali; Karimi, Danial; AZAD, ARYAN; Ghanbarpour, Morteza; Behnia, Masud (2021-10-01) Usage of phase change materials' (PCMs) latent heat has been investigated as a promising method for thermal energy storage applications. However, one of the most common disadvantages of using latent heat thermal energy sto...
Multichromic Vanadium Pentoxide Thin Films Through Ultrasonic Spray Deposition Tutel, Yusuf; Durukan, Mete Batuhan; Cakmak, Huseyin; Koylan, Serkan; Hekmat, Farzaneh; Ozensoy, Emrah; Ozbay, Ekmel; UDUM, YASEMİN; Toppare, Levent; Unalan, Husnu Emrah (2021-10-01) Vanadium pentoxide (V2O5) is a highly promising material for optoelectronic applications due to its wide optical band gap, significant thermal/chemical stability, and intriguing multichromic properties. Nonetheless, the pr...
Multifunctional and Physically Transient Supercapacitors, Triboelectric Nanogenerators, and Capacitive Sensors Durukan, Mete Batuhan; Çiçek, Melih Ögeday; Doğanay, Doğa; Çınar, Simge; Ünalan, Hüsnü Emrah (2021-10-01) Electronic waste (e-waste) grows in parallel with the increasing need for consumer electronics. This, unfortunately, is leading to pollution and massive ecological problems worldwide. A solution to this problem is the use ...
Determining the endurance limit of AISI 4340 steels in terms of different statistical approaches Caliskan, Salim; Gürbüz, Rıza (2021-10-01) In engineering applications, fatigue phenomenon is a key issue and needs to be analyzed in the beginning of design phase in case of any component exposed to alternating loading on operation otherwise catastrophic fatigue f...

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