Süha Tirkeş

E-mail

stirkes@metu.edu.tr

Department

Welding Tech. and Non-Destructive Testing Res./App. Center

Investigating the Effects of CoMoCrSi Powder Composition and Particle Size, and Annealing Heat Treatment on Microstructure and Mechanical and Tribological Performance of HVOF Sprayed Coatings Ertürk, Murat Tolga; Tirkeş, Süha; Gür, Cemil Hakan (2024-1-01) An investigation was conducted to analyze the mechanical properties, wear behavior, and microstructure of coatings formed by high-velocity oxygen fuel spraying of CoMoCrSi powders. The effects of varying Cr concentration a...
Investigating the Effects of Repair Welding on Microstructure, Mechanical Properties, and Corrosion Behavior of IN-939 Superalloy Mashhuriazar, Amirhossein; Badihehaghdam, Mohammadhassan; Gür, Cemil Hakan; Ertürk, Murat Tolga; Batıgün, Caner; Tirkeş, Süha; Sajuri, Zainuddin; Omidvar, Hamid (2022-11-01) This study aimed to investigate the effects of tungsten inert gas (TIG) repair welding on microstructure, mechanical properties, and corrosion resistance of Inconel 939. After welding with Inconel 625 filler under argon at...
Contribution of surface silanization process on mechanical characteristics of TPU-based composites involving feldspar and quartz minerals Bouzmane, Hajar; Tirkeş, Süha; Yilmaz, Volkan Murat; Tayfun, Umit; TİRKEŞ, SEHA (2022-09-01) In this study, quartz and feldspar powders were surface treated using a silane coupling agent to achieve a more compatible mineral surface with the polymer matrix. Details of surface characteristics of minerals were examin...
Optimizing the Heat Treatment Parameters of Additively Manufactured IN718 Components Kaleli, Tuğçe; Yağmur, Aydın; Tirkeş, Süha; Gür, Cemil Hakan (2021-9-01) Ni-based superalloys have gained importance in aerospace and energy industries due to their excellent mechanical properties at elevated temperatures. Conventional manufacturing methods such as casting and forging create ...
Effect of Heat Treatment on Microstructure and Mechanical Properties of Additively Manufactured 18Ni300 Maraging Steels Aydın, İbrahim; Yağmur, Aydın; Tirkeş, Süha; Gür, Cemil Hakan (2021-09-01) Recently, additive manufacturing of maraging steels has gained importance as an alternative to the traditional manufacturing techniques for aerospace components. In this study, various procedures were conducted to find ...
Fatigue Cracking of Hybrid Plasma Gas Metal Arc Welded 2205 Duplex Stainless Steel Yurtışık, Koray; Tirkeş, Süha (2014-01-01) Contrary to other keyhole welding applications on duplex stainless steels, a proper cooling time and a dilution were achieved during hybrid plasma gas metal arc welding that provided sufficient reconstructive transformatio...
Characterization of Duplex Stainless Steel Weld Metals Obtained by Hybrid Plasma-Gas Metal Arc Welding Yurtışık, Koray; Tirkeş, Süha; Gür, Cemil Hakan; Gürbüz, Rıza (FapUNIFESP (SciELO), 2013-07-01) Despite its high efficiency, autogenous keyhole welding is not well-accepted for duplex stainless steels because it causes excessive ferrite in as-welded duplex microstructure, which leads to a degradation in toughness and...
Electrochemical polymerization and characterization of polyether-substituted aniline derivatives Tirkeş, Süha; Oenal, Ahmet M. (Wiley, 2007-08-01) New compounds consisting of aniline units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis and cyclic voltammetry in an aqueous so...
Electrosynthesis of polyfuran in acetonitrile-boron trifluoride-ethyl ether mixture and its device application Tirkeş, Süha; Önal, Ahmet Muhtar (Wiley, 2007-01-15) Electrochemical polymerization of furan was achieved in acetonitrile/boron trifluoride/ethyl ether (CH3 CN/BF3/EE) mixture in the presence of tetrabutylammonium tetrafluoroborate via constant potential electrolysis at 1.4 ...
Synthesis and polymerization of 2-and 3-substituted thiophene derivatives linked by polyether bridges Tirkeş, Süha; Önal, Ahmet Muhtar (Elsevier BV, 2004-11-15) New compounds consisting of 2- and 3-thienyl units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis (CPE) in an electrolytic solut...

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