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Browsing Malzeme Bilimi ve Mühendisliği Bölümü by Title

Now showing items 29-48 of 50

In Vitro Bioactivity Investigation of Alkali Treated Ti6al7nb Alloy Foams

Bütev, Ezgi; Esen, Ziya; Bor, Şakir (Elsevier, 2015-02-01)

Biocompatible Ti6Al7Nb alloy foams with 70% porosity manufactured by space holder method were activated via alkali treatment using 5 M NaOH solution at 60 degrees C. The interconnected pore structures enabled formation of ...
Investigation of phase selection hierarchy in Mn-Al alloys

Genç, Ayşe Merve; Acar, Özgün; Turan, Servet; Kalay, İlkay; Savacı, Umut; Kalay, Yunus Eren (2019-12)

Primarily attributed to the formation of the ferromagnetic tau-phase, near equiatomic composition of Mn-Al have recently received much attention in permanent magnet industry. Several mechanisms have been proposed in ...
Investigation of the Erosive Wear Resistance of Boronized Ash-Blowing Nozzles

Çalık, A.; Özbakır, O.; Karakaş, S.; Uçar, N. (Polish Acad Sciences Inst Physics, 2017-02)

In this study, pack boronizing was applied to ash-blowing nozzles manufactured from AISI 1040 steels using Ekabor II powders as the boronizing source at a temperature of 1273 K for a duration of 8 h. Erosive wear tests of ...
Ionization energies, Coulomb explosion, fragmentation, geometric, and electronic structures of multicharged boron clusters B-n (n=2-13)

Akman, Nurten; Taş, Murat; Özdoğan, Cem; Boustani, Ihsan (Amer Physical Soc, 2011-08-11)

Based on the ab initio quantum chemical methods, we have determined fragmentation channels, ionization energies, and the Coulomb explosion of multicharged boron clusters B-n (n = 2-13), where n is the cluster size. The ...
Kinetics and Mechanisms of Isothermal Devitrification in Amorphous Cu50Zr50

Cullinan, Tim; Kalay, İlkay; Kalay, Y. Eren; Kramer, Matt; Napolitano, Ralph (2015-02)

The crystallization kinetics and microstructural dynamics associated with devitrifying a meltspun Cu50Zr50 metallic glass were investigated using isothermal treatments, in situ high-energy synchrotron X-ray diffraction, ...
Kinetics and mechanisms of isothermal devitrification inamorphous cu50zr50

Cullinan, Tim; Kalay, İlkay; Kalay, Y. Eren; Kramer, Matt; Napolitano, Ralph (Springer, 2015-02)

The crystallization kinetics and microstructural dynamics associated with devitrifying a melt-spun Cu50Zr50 metallic glass were investigated using isothermal treatments, in situ high-energy synchrotron X-ray diffraction, ...
Local Chemical and Topological Order in Al-Tb And its Role in Controlling Nanocrystal Formation

Kalay, Y. E.; Kalay, I.; Hwang, Jinwoo; Voyles, P. M.; Kramer, M. J. (Pergamon-Elsevier Science LTD, 2012-03)

How the chemical and topological short- to medium-range order develops in Al-Tb glass and its ultimate effect on the control of the high number density of face-centered-cubic-Al (fcc-Al) nuclei during devitrification are ...
Microstructural and texture evolution during thermo-hydrogen processing of Ti6Al4V alloys produced by electron beam melting

Doğu, Merve Nur; Esen, Ziya; Davut, Kemal; Tan, Evren; Gümüş, Berkay; Dericioğlu, Arcan F. (2020-10)

The present study was conducted to reveal the effects of building angles and post heat-treatments (2-step Thermo-Hydrogen Processing (THP) and conventional annealing treatment) on the density, microstructure and texture ...
Microstructural Refinement of Ti-6Al-4V Alloy Fabricated by Additive Manufacturing Using Thermochemical Processes

Bilgin, Güney Mert; Esen, Ziya; Kuşhan Akın, Şeniz Reyhan; Dericioğlu, Arcan Fehmi (2016)
Microstructure and Mechanical Properties of CoCrFeNi(TiAl) High Entropy Alloys

Kalay, İlkay (2020)

The structure and mechanical properties of CoCrFeNi and CoCrFeNiTi0.5Al0.5 (in molar ratio) high entropy alloys were investigated using X-ray diffraction (XRD), optical microscope (OM), scanning electron microscope (SEM), ...
Nanocrystallization In Cu-Zr-Al-Sm Bulk Metallic Glasses

Sıkan, Fatih; Yaşar, Bengisu; Kalay, İlkay (Springer, 2018-04)

The effect of rare-earth element (Sm) microalloying on the thermal stability and crystallization kinetics of melt-spun ribbons and suction-cast rods of Zr48Cu38.4Al9.6Sm4 alloy were investigated using differential scanning ...
Nanoscale structure and structural relaxation in Zr 50Cu 45Al 5 bulk metallic glass

Hwang, Jinwoo; Melgarejo, Z.H.; Kalay, Y.E.; Kalay, İlkay; Kramer, M.J.; Stone, D.S.; Voyles, P.M. (2012-05-11)

Hybrid reverse Monte Carlo simulations of the structure of Zr 50Cu 45Al 5 bulk metallic glass incorporating medium-range structure from fluctuation electron microscopy data and short-range structure from an embedded atom ...
Optimization of the mechanical properties of Ti-6Al-4V alloy fabricated by selective laser melting using thermohydrogen processes

Bilgin, Güney Mert; Esen, Ziya; Kuşhan Akın, Seniz Reyhan; Dericioğlu, Arcan F. (Elsevier Science SA, 2017-07-17)

2-step Thermo Hydrogen Process (THP) including hydrogenation and dehydrogenation steps was applied to Ti-6Al-4V alloy fabricated by selective laser melting (SLM) process to refine the microstructure and to increase the ...
Reaksiyon Bağlı Silisyum Nitrür Seramiklerinde Sinterleme İlavesinin Mikroyapı ve Antibakteriyel Davranışa Etkisinin İncelenmesi

Kuşhan Akın, Şeniz Reyhan (2021)

Silisyum Nitrür (Si3N4) genellikle yüksek sıcaklık ve yapısal uygulamalarda tercih edilen, üstün özellikli bir oksit dışı seramiktir. Çok sert bir malzeme olmasının yanı sıra, çubuksu beta () tanelerin gelişimi ile seramik ...
Stability of edge states and edge magnetism in graphene nanoribbons

Kuntsmann, Jens; Özdoğan, Cem; Quandt, Alexander; Fehske, Holger (Amer Physical Soc, 2011-01-21)

We critically discuss the stability of edge states and edge magnetism in zigzag edge graphene nanoribbons (ZGNRs). We point out that magnetic edge states might not exist in real systems and show that there are at least ...
Surface characteristics and in-vitro behavior of chemically treated bulk Ti6Al7Nb alloys

Esen, Ziya; Öcal, Ezgi Bütev (Elsevier Science SA, 2017-01-15)

The effect of various treatments on surface chemical composition and structure, and bioactivity of Ti6Al7Nb bulk alloys has been investigated. The alloys were treated employing aqueous solutions of NaOH and CaCl2 separately, ...
Synthesis, molecular structure and DFT study of 2-(N-Benzoylbenzamido)pyridine-3-yl benzoate

Yüksektepe, Çiğdem; Kazak, Canan; Özdoğan, Cem; Güvenç, Ziya B.; Büyükgüngör, Orhan; Arslan, Figen; Odabaşoğlu, Mustafa (Springer/Plenum Publishers, 2011-10)

The biologically important 2-amino-3-hydroxypyridine reacts with benzoyl chloride to give 2-(N-benzoylbenzamido)pyridine-3-yl benzoate. This synthesized compound has been studied by elemental analysis, X-ray crystallography ...
Temperature Dependence of the Brillouin Frequency Shift and the Linewidth of the LA Mode in the Ferroelectric Phase of PZT-x (PbZr1-xTixO3)

Yurtseven, F.; Korkmaz, C. Şişman (IEEE, 2015)

The temperature dependence of the Brillouin frequency and the linewidth of the LA mode is studied for the concentration of x=0.45 in the ferroelectric phase of PbZr1-xTixO3 (PZT-x) within the temperature range of 443 to ...
The Effect of Processing Routes On the Structure and Properties of Magnesium-Tini Composites

Esen, Ziya (Elsevier Science SA, 2012-12-15)

TiNi particulate-reinforced magnesium matrix composites were fabricated by rotary hot swaging and post-annealing heat treatment. The magnesium matrix of the processed composites was observed to contain elongated grains ...
Tini Reinforced Magnesium Composites By Powder Metallurgy

Esen, Ziya (John Wiley and Sons LTD., 2011)

Rod shaped Mg-TiNi composite samples were manufactured bypowder metallurgical route in which the samples were heated and deformed simultaneously using rotary hot swaging technique. Firstly, encapsulated argon filled copper ...

Now showing items 29-48 of 50

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