Non-Conventional Machining, 2012 Indian Institute of Technology - Kharagpur
Flow Characteristics Of Blast Furnace Slag, 2012 Indian Institute of Technology - Kharagpur
Flow Characteristics Of Blast Furnace Slag, Ajit Behera
Ajit Behera
No abstract provided.
Processing And Characterization Of Plasma Spray Coating By Using Industrial Waste And Low-Grade Ore, 2012 Indian Institute of Technology - Kharagpur
Processing And Characterization Of Plasma Spray Coating By Using Industrial Waste And Low-Grade Ore, Ajit Behera
Ajit Behera
No abstract provided.
Flow Characteristics Of Blast Furnace Slag: Practical Aspects Of Synthetic Slag, 2012 Indian Institute of Technology - Kharagpur
Flow Characteristics Of Blast Furnace Slag: Practical Aspects Of Synthetic Slag, Ajit Behera
Ajit Behera
No abstract provided.
Plasma Spray Of Fly-Ash+Quartz+Illmenite: Spraying On Metal Substrates, 2012 Indian Institute of Technology - Kharagpur
Plasma Spray Of Fly-Ash+Quartz+Illmenite: Spraying On Metal Substrates, Ajit Behera
Ajit Behera
No abstract provided.
Assesment Of Ammoniacal Ammonium Sulphate Leaching As A Pretreatment Process For Copper Bearing Gold Ores Bas, A.D,, Kucuk, A.,, Yazici, E.Y.,, Deveci, H Proceedings Of Xiiith International Mineral Processing Symposium-Imps 2012; 10/2012, Ahmet Deniz Bas, Ali Kucuk, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Recovery Of Silver From X-Ray Film Processing Effluents By Hydrogen Peroxide Treatment, 2012 Laval University
Recovery Of Silver From X-Ray Film Processing Effluents By Hydrogen Peroxide Treatment, Ahmet Deniz Bas, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Bacteria-Assisted Leaching Of Waste Computer Printed Circuit Boards, 2012 Laval University
Bacteria-Assisted Leaching Of Waste Computer Printed Circuit Boards, Ahmet Deniz Bas, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Treatment Of A Copper-Rich Gold Ore By Ammonia Assisted Cyanide Leaching, 2012 Laval University
Treatment Of A Copper-Rich Gold Ore By Ammonia Assisted Cyanide Leaching, Ahmet Deniz Bas, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Influence Of Microstructural Length Scale On Deformation Behavior Of Magnesium Alloys, 2012 Missouri University of Science and Technology
Influence Of Microstructural Length Scale On Deformation Behavior Of Magnesium Alloys, Wei Yuan
Doctoral Dissertations
"Friction stir processing (FSP) is emerging as an effective tool for microstructural modification. Mg-Al-Zn alloys with different aluminum contents were subjected to FSP to achieve fine grained and ultrafine grained (UFG) structure. The objective of this work was to study the influence of microstructural length scale on the governing deformation and strengthening mechanisms of FSP magnesium alloys.
FSP introduced strong basal fiber texture and processing parameter dependent grain/precipitate size and distribution. Grain refinement promoted non-basal dislocation activation at room temperature. The strength of the alloy increased as a consequence of grain refinement following classic Hall-Petch relationship to different extents due …
Plastic Strain Accommodation And Acoustic Emission During Melting Of Embedded Indium Particles In Aluminum, 2012 Missouri University of Science and Technology
Plastic Strain Accommodation And Acoustic Emission During Melting Of Embedded Indium Particles In Aluminum, Michael M. Kuba
Masters Theses
"Melting of micron-sized (0.2 to 3 µm diameter) indium particles embedded in an aluminum matrix was discovered to produce acoustic emission. Melting of embedded immiscible particles produces a pure dilation during the phase transformation and has no long-range diffusion field to control the speed of transformation. It was found that acoustic emission can no longer be considered as a criterion of displacive transformations and that melting of micron-sized embedded particles is strain energy controlled. Acoustic emission was confirmed to result from the rapid relaxation of aluminum around indium particles embedded on grain boundaries. Prismatic punching of dislocation loops is proposed …
Development Of Third Generation Advanced High Strength Steels, 2012 Missouri University of Science and Technology
Development Of Third Generation Advanced High Strength Steels, Meghan C. Mcgrath
Doctoral Dissertations
"Lightweight duplex steels with combinations of either bainite, acicular ferrite, and austenite or martensite and austenite were investigated as third generation advanced high strength steels targeted for automotive applications. Large additions of manganese (>13 wt%) and carbon (
Duplex steels with different volume fractions of primary δ -ferrite were used to study the crystallography of austenite formed during the peritectic reaction. Solute profiles across the peritectic interface showed aluminum segregated near the interface which promoted bainitic ferrite formation. Thermal treatments were used to manipulate the concentration and type of oxides and the ferrite plate density was found to correlate …
Friction Stir Welding Of High Temperature Alloys, 2012 Missouri University of Science and Technology
Friction Stir Welding Of High Temperature Alloys, Jiye Wang
Doctoral Dissertations
"Friction stir welding (FSW) of Ti-6Al-4V alloy, nickel-based and iron-based oxide dispersion strengthened (ODS) alloys (MA754 and MA956) has been studied. The main aspects covered include tool evaluation, microstructural evolution, mechanical properties, and correlation between processing, microstructure and mechanical properties. Tool performance study was carried out for Ti-6Al-4V alloy with refractory tools made of W-1.1%La₂O₃ and two different grades of WC-Co based materials. The results showed that tool degradation can be attributed to mechanical and chemical interaction with processed material. The nature of tool-workpiece interaction was tool material dependent and influenced the resultant microstructure and weld quality in the stirred …
Preg-Robbing Potential Of Sulphide-Bearing Gold Ores, 2011 Laval University
Preg-Robbing Potential Of Sulphide-Bearing Gold Ores, Ahmet Deniz Bas, Pelin Altinkaya, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Failure Analysis Of Leaking Stainless Steel Pump Casing, 2011 University of Tennessee - Knoxville
Failure Analysis Of Leaking Stainless Steel Pump Casing, Mary E. Parker
Chancellor’s Honors Program Projects
No abstract provided.
Processing, Microstructures, And Properties Of Aluminide-Strengthened Ferritic Steels, 2011 University of Tennessee, Knoxville
Processing, Microstructures, And Properties Of Aluminide-Strengthened Ferritic Steels, Zhenke Teng
Doctoral Dissertations
NiAl-strengthened ferritic steel is a material of interest for steam turbine applications due to their promising creep resistance, high thermal conductivity, low cost and thermal expansion coefficient. However, there are two critical issues restricting their applications: low room temperature ductility and limited creep resistance at temperatures higher than 600°C. The reasons for these behaviors have not been fully understood, especially the processing-microstructure-property relationship has not been clearly identified.
The alloys were designed, fabricated, and processed, according to the required microstructures and properties. The matrix and precipitates can be thoroughly characterized by a combination of techniques, including atom probe tomography, neutron …
Computational And Experimental Study Of Structure-Property Relationships In Nial Precipitate-Strengthened Ferritic Superalloys, 2011 University of Tennessee, Knoxville
Computational And Experimental Study Of Structure-Property Relationships In Nial Precipitate-Strengthened Ferritic Superalloys, Shenyan Huang
Doctoral Dissertations
Ferritic superalloys strengthened by coherent ordered NiAl B2-type precipitates are promising candidates for ultra-supercritical steam-turbine applications, due to their superior resistance to creep, coarsening, oxidation, and steam corrosion as compared to Cr ferritic steels at high temperatures. Combined computational and experimental tools have been employed to investigate the interrelationships among the composition, microstructure, and mechanical behavior, and provide insight into deformation micromechanisms at elevated temperatures.
Self and impurity diffusivities in a body-centered-cubic (bcc) iron are calculated using first-principles methods. Calculated self and impurity diffusivities compare favorably with experimental measurements in both ferromagnetic and paramagnetic states of bcc Fe. The calculated …
Shear-Band Formation And Thermal Activation In Metallic Glasses, 2011 University of Tennessee, Knoxville
Shear-Band Formation And Thermal Activation In Metallic Glasses, Lu Wang
Doctoral Dissertations
Metallic glasses (MGs) usually have high strength, high hardness and high elastic strain limit. However, the deformation mode and mechanism in metallic glasses are radically different from those in conventional crystalline materials with a long-range ordered structure. For crystalline materials, the intrinsic relationship between their mechanical properties and crystal structures has been well described by dislocation theory. In contrast, for amorphous materials, theories on the structures and controlling factors of localized shear-band formation are far from being complete.
In this thesis, shear-banding behavior of MGs under nanoindentation was first reviewed. The hardness of MGs was found to be independent on …
Micromechanical Studies Of Intergranular Strain And Lattice Misorientation Fields And Comparisons To Advanced Diffraction Measurements, 2011 University of Tennessee, Knoxville
Micromechanical Studies Of Intergranular Strain And Lattice Misorientation Fields And Comparisons To Advanced Diffraction Measurements, Lili Zheng
Doctoral Dissertations
Inhomogeneous deformation fields arising from the grain-grain interactions in polycrystalline materials have been evaluated using a crystal plasticity finite element method and extensively compared to neutron diffraction measurements under fatigue crack growth conditions. The roles of intergranular deformation anisotropy, grain boundary damage, and non-common deformation mechanisms (such as twinning for hexagonal close packed crystals) are systematically evaluated. The lattice misorientation field can be used to determine the intragranular deformation behavior in polycrystals or to describe the deformation inhomogeneity due to dislocation plasticity in single crystals. The study of indentation-induced lattice misorientation fields in single crystals sheds lights on the understanding …
Modeling And Control Of A Flexible Ionic Polymer Metal Composite(Ipmc) Actuator For Underwater Propulsion, 2011 University of Nevada, Las Vegas
Modeling And Control Of A Flexible Ionic Polymer Metal Composite(Ipmc) Actuator For Underwater Propulsion, Shivakanth Gutta
UNLV Theses, Dissertations, Professional Papers, and Capstones
The goal of this research is to model and control the underwater vehicle propelled by IPMC actuator. IPMC consists of an ionic membrane sandwiched between two metallic electrodes. When an external voltage is applied, IPMC undergoes large deformation due to transport of ions. Due to its ability to work in aqueous environments, it can be used for developing small scale underwater vehicles.
First, Finite element approach is used to describe the dynamics of the both single and segmented IPMC actuator. In the approach presented, each element is attached with a local coordinate system that undergoes rigid body motion along with …