Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Tool steel"”.
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Directed energy deposition of tool steel/copper alloy multi-material structures
… by directed energy deposition (DED) using tool steel and copper alloy. Specifically, AISI H13 hot work tool steel is deposited on copper-beryllium alloy (CuBe) substrate using three deposition strategies: directly depositing H13 on CuBe (H13/CuBe), SS316L buffer (H13/SS316L/CuBe), and …
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Ultrafine-Grained Surface Layers on S7 Tool Steel via Electron Beam Irradiation and Cryogenic Freezing.
North Carolina State University Theses Materials Science and Engineering.
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Study of Titanium based Composite Coatings for Resistance against Molten Aluminium Soldering on H13 Tool Steel
… reactive with the constituents of H13 die steel and has a tendency to form intermetallic layers. This chemical interaction results in sticking of molten metal to the die surface which produces defective castings and also damages the die surface. The use of thermal spray coatings provides …
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Rehardenable materials system with diffusion barrier for three-dimensional printing
… for the direct manufacture of functional tooling and prototypes from a computer solid model. One of its many important applications is the fabrication of metal tooling for plastic injection molding. In order to achieve a fully dense 3DP metal tool, the sintered powder skeleton is …
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Determination of Wall Thickness and Height when Cutting Various Materials with Wire Electric Discharge Machining Processes
… 6061 T6, Yellow Brass SS360, 420 Stainless Steel, D2 unheat-treated tool steel 25-30 RC, and D2 heat-treated tool steel 60-65 RC. The small parts were cut to a 6mm (0.2362 inch) height with six different wall thicknesses: 0.30mm (0.0118 inch), 0.25mm (0.0098 inch), 0.20mm (0.0078 inch), …
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Comparing the Feasibility of Cutting Thin-Walled Sections from Five Commonly Used Metals Utilizing Wire Electric Discharge Machining
… to machine a desired part. Because there is no tool that comes in direct contact with the workpiece, it is possible to machine thin, delicate parts. This thesis was designed to observe and analyze the differences in cutting capabilities for a conventional wire-EDM machine when cutting …
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High speed tool steels
Open Restriction set for Item 97489 on 2017-01-24T22:17:35Z with date null by kappleg2@illinois.edu.
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Characterization of Carbonaceous Exsolvate from Metal Melts
… carbon meso-structures in the strengthening of steel by characterizing the carbonaceous exsolvate from a metal-carbon melt. Metal-carbon matrix composites, such as the material used in this investigation, are commonly employed to strengthen tool steel. Structural analysis techniques including …
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An investigation into the effect of process parameters on carbon film physical properties produced by different deposition techniques
… both d.c and r.f. conditions). Films grown on tool steel in a butane r.f. plasma have a hardness around 4000 HK (25g). The growth rate on glass under similar conditions is very low, but the film is completely transparent with an optical band gap of 2.6 eV. When argon is used as the carrier gas, …
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Multi-material Adhesive Bonded Joints Under Static And Dynamic Loading
… given to joints involving 3D printed H13 tool steel bonded to aluminum. The insights gained from this work aim to inform the design of lightweight, impact-resistant bonded structures and contribute to the broader understanding of dynamic adhesive joint behavior.</p>
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To spark imagination: the American Film Institute
… film. Because imagination is the most important tool the film maker possesses and is that which the general audience becomes a part of, this thesis strives to produce a building which enhances this tool. Steel and glass have been chosen as two of the three primary materials in the film institute …
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The identification and modelling of the dominant failure mode in hot forging tooling
… of the dominant failure mode in hot forging tooling, used in the production of nickel based superalloy compressor blades. A preliminary study identified the most frequently occurring part defects that cause tool failure. The forming process was characterised, relevant tooling failure modes …
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Micro Surface Texturing for Friction Control
… are fabricated using laser ablation on hardened tool steel samples, while the hexagonal dimples are fabricated using photo-lithography. The dimples are arranged in adjacent equilateral triangles layout. Coefficients of friction were measured using a scratch tester under dry sliding conditions and …
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Effects of chromium powder mixed in electrical discharge machining of AISI D2 hardened steels
… mixed in EDM machining of AISI D2 hardened steel using copper tungsten electrode which has been done successfully. Data were analysed using design of three factors at a time consisted of peak current (Ip), pulse-on (Pon) and powder concentration(C). Discussions were made on the responses …
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A novel method of detecting galling and other forms of catastrophic adhesion in tribotests
… in industrial applications. They are invaluable tools for lubricant development since many lubricant parameters can be screened in the laboratory with only the best going on to production trials. Friction force or coefficient of friction is often used as an indicator of lubricant performance with …
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Laser surface modification of steel
… of the laser surface modification of H13 tool steel using pulse laser processing mode. Initial screening experimental designs conducted lead to more optimised detailed designs. A carbon dioxide (CO2) laser system with 10.6 μm wavelength was used. In the experimental designs investigated …
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Novel components by magnetron sputtering
… ratio of 238 MPa/ g cm" 3 , approaching that of tool steel.
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Design of a Linear Ultrasonic Piezoelectric Motor
… of 0.4 m/s. A prototype frame was built out of tool steel and run against an oxide ceramic plate. The USM prototype's piezoelectric elements did not provide the expected displacements in the motor frame as determined by the FEM. The discrepancy was determined to be caused manufacturing errors. …
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Three dimensional printing with fine metal powders
… traditional machining and P/M technologies: hard tooling is not required to manufacture parts, geometries may be created which can not be made by conventional processes, and the composition of parts may be controlled locally on a 100 gm scale. The surface finish of 3DPTM parts will be a key factor …
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The impact of multilayer periodicity on texture, morphology, chemical stability and machining performance of titanium aluminum nitride/chromium nitride thin films
… respectively. Finally, dry high speed flank wear tool life experiments were completed against A2 tool steel, with the impact of the multilayer period reported in ISO standard wear vs. cutting time format. Machining results were connected back to the previously identified changes in …
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