SPRING SEMESTER GRADUATE APPLICATIONS RESEARCH TOPICS FOR PROSPECTIVE STUDENTS

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James Lyons
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1 SPRING SEMESTER GRADUATE APPLICATIONS RESEARCH TOPICS FOR PROSPECTIVE STUDENTS Program (. or Integrated Prof.Dr. İshak Karakaya Electrodeoxidation and/or. Program (. or Integrated Assist. Prof. Dr. H. Emrah ÜNALAN and Assist. Prof. Dr. Y. Eren Kalay Development and Characterization of Metal Matrix Composites with Carbon Nanotubes M.Sc No funding. Program (. or Integrated Prof.Dr. Bilgehan Ögel Prof.Dr.Rıza Gürbüz Mechanical Properties of Bainitic Steels for Railway Applications The materials will be supplied by TCDD.

2 Program (. or Integrated Prof. Dr. Abdullah Öztürk Production and Photocatalytic properties of B and Zr codoped TiO2 powders. This study aims to improve photocatalytic efficiency of TiO 2 powder by B and Zr co- doping by sol-gel and hydrothermal processing methods. Powders produced by each method will be characterized by X-Ray powder diffraction (XRD) and Scanning Electron Microscope (SEM). XRD will be used to identify the crystalline phases present in the powders produced. Changes in lattice parameters of TiO 2 structure after doping will also be determined by XRD. SEM and particle size analyzer will be used for examining the morphology of powders. X-Ray Photoelectron Spectroscopy (XPS) will be used to observe the effect of doping on TiO 2 powders. Photocatalytic performance of the powders will be evaluated by Methylene Bluee test under UV light illumination using a UV-vis Spectrophotometer. The candidate must be student and must work at least 6 hour/day in the lab. The candidate must have about sol-gel and hydrothermal processing methods. There is no funding. Program (. or Integrated Power parameter analysis for robotic welding to control the weld pool viscosity with respect to gravity The objective of this thesis is to design and analyze welding voltage and current amplitude, which determine the weld pool viscosity and fluidity, through circumferential welding applications using an industrial robot. The applicant should have a significant background in metallurgy of steels and arc welding processes. She or he should be eager to study mass transfer phenomena both for solid and liquid metals in a comprehensive manner.

3 Program (. or Integrated An investigation for creep behavior of 9Cr-1Mo martensitic steel joints obtained by low heat input and low dilution keyhole welding The applicant should have a significant background in Cr- Mo steels and arc welding processes. She or he should be eager to study the welding metallurgy of such steels in a comprehensive manner. Program (. or Integrated Simulation of Gas Metal Arc Welding Program (. or Integrated Advanced Non-Destructive Testing of Composite Materials by Phased-Array Method

4 An investigation of the nitrogen sensitivity of δ to γ balance and grain morphology in duplex stainless steel weldments The balanced delta-ferrite (δ) and austenite (γ) content of duplex stainless steel (DSS) offers a good combination of strength and corrosion resistance. Due to its relatively higher strength, chloride stress-corrosion cracking and pitting resistance, DSS has been preferred to austenitic stainless steels especially in components like piping and reaction vessels, where welding is an inevitable process in fabrication. The competitive value of keyhole welding among fusion welding techniques is beyond controversy. Keyhole welding techniques have occupied one of two future-promising research and development concepts through studies of Non-conventional Joining Group in Middle East Technical University, Welding Technology and Non-destructive Testing Research and Application Center since Except electron beam welding, which is applied under vacuum, fusion zone of the weldment is shielded from the air during keyhole welding performances, such as plasma arc welding and Laser beam welding. Nitrogen in the shielding atmosphere benefits densification of a plasma jet that directly affects the power density and consequently the surface tension of the weld pool and the direction of Marangoni convection through the weld pool. However, nitrogen is considered to be a critical element for DSS since phase balance and morphology in as-welded microstructure of the material would be affected significantly. Program (. or Integrated Other details (funding, any other aspect that you think applicant should know about the project working condition full time/part time, etc.) The objective of the thesis is to investigate interactions in between the nitrogen concentration in the shielding gas, the plasma jet densification, the weld pool convection, and phase balance and morphology during hybrid plasma arc welding and Laser beam welding of DSS. Concerning the projection that DSS will continue to share a significant portion of the stainless steel market and there are still many points to be cleared for the nitrogen sensitivity of DSS, possible outputs of this thesis would have impact on areas of welding metallurgy and physical metallurgy of DSS.. The applicant should have a sound background in metallurgy of stainless steels and a significant background in arc welding processes. She or he should be eager to study mass and heat transfer phenomena in a comprehensive manner.

5 Program (. or Integrated aspect that you think applicant should know about the project working condition full time/part time, etc. ) Prof.Dr. Şakir Bor Deformation and Recrystallization Characteristics of Precipitation Hardenable Mg alloys Full time Program (. or Integrated aspect that you think applicant should know about the project working condition full time/part time etc ) NON FERROUS BASED BULK AMORPHOUS(METALLIC GLASS)/BULK NANOCRYSTALLINE MATERIALS : CONSUMER ELECTRONIC DEVICE APPLICATIONS Program (. or Integrated aspect that you think applicant should know about the project working condition full time/part time etc ) FERROUS BASED BULK AMORPHOUS(METALLIC GLASS)/BULK NANOCRYSTALLINE MATERIALS : ENGINNERING APPLICATIONS

6 Program (. or Integrated NANOALLOYS AS ADVANCED MATERIALS: FROM STRUCTURE TO PROPERTIES AND APPLICATIONS Program (. or Integrated MAGNETIC REFRIGERATION: STRUCTURAL AND MAGNETIC PROPERTIES OF MAGNETOCALORIC MATERIALS Program (. or Integrated Prof. Dr. Vedat Akdeniz MECHANICAL AND METALLURGICAL BEHAVIOUR IN FLASH BUTT WELDING OF RAIL

7 Program (. or Integrated aspect that you think applicant should know about the project working condition full time/part time, etc. ) Prof.Dr. Tayfur Öztürk Improved Electrode Performance in NiMH Batteries Improved performance of negatif electrode in NiMH batteries especially in high discharge rates depends not only on the intrinsic properties of the hydrogen storage alloy powder, but also strongly on the manufacturing method of the metal hydride electrode. In this work, electrode architecture will be improved with the use of special additives and the processing techniques to reduce contact resistance and to enhance the electrocatalytic activity of the alloy powder /integrated. Full time (CGPA> 2.75) This is a part of concert-japan project NOVELBAT involving 6 countries -Japan, Norway, Germany, France, Sweden and Turkey-, the project is currently under evaluation ). Program (. or Integrated aspect that you think applicant should know about the project working condition full time/part time, etc. ) Prof.Dr. Tayfur Öztürk Thermal Plasma Synthesis of B 4 C and SiC The production B4C and SiC can be achieved with a thermal plasma using methane and oxide as precursors. A parametric study will be carried out to determine conditions that would maximize the material yield. The properties of the resulting material will also be characterized /integrated. Full time (CGPA> 2.75) Financial support for student might be available Program (. or Integrated Prof. Dr. A. Macit Özenbaş Plasmon-enhanced dye sensitized solar cells using coreshell metal-insulator nanoparticles. Student Experience in constructing dye sensitized solar cells.

Colorado School of Mines Department of Metallurgical and Materials Engineering MTGN Metallurgy of Welding Prof. Stephen Liu

Colorado School of Mines Department of Metallurgical and Materials Engineering MTGN475-477 Metallurgy of Welding Prof. Stephen Liu Exam #3 Posted: December 3, 2001 Due: December 10, 2001 (Answer only 8