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 119 for “"Surface finish"”.
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Milling cutter software architecture for force and surface finish modeling
… manner. Efficiency and accuracy of the force and surface finish modeling are the main focus of this study.</p><p>Force modeling is an important part of milling research since it is directly connected to tool health and workpiece quality. A number of force models are investigated for feedrate …
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Factors limiting the surface finish of three dimensional printed parts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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The effect of forward slip on the surface finish of cold rolled aluminum
… microscope were used to examine the strip surface. A grainy pattern, which varied with the rolling condition, was observed on the sample surface. The grainy pattern resulted from three effects: grooves imprinted by the rolls, black spots identified as hydropitting (HP), and horseshoe shaped …
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Transfer of surface finish from roll to strip in the temper rolling of steel
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Improvement to the surface finish of additive laser manufactured parts made by selective laser melting
… it is limited by a few issues such as quality of surface finish and porosity. The current study focuses on improving the surface finish of parts built on an SLM machine through two different approaches of post processing technique, laser re-melting followed by electropolishing. In this …
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The effect of surface finish on piston ring-pack performance in advanced reciprocating engine systems
… frictional losses within an engine. Methods of surface texture optimization were investigated to reduce piston ring-pack friction and increase engine brake thermal efficiency. Adverse effects of surface texture optimization on engine oil consumption and durability were also considered. Although …
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The effect of alloying element in lead-free solders on intermetallics growth with enimag surface finish
Surface finish is coated layer plated on a bare copper board of printed circuit board (PCB). Among PCB surface finishes, Electroless Nickel/Immersion Gold (ENIG) finish is a top choice among electronic packaging manufacturer due to its excellent properties for PCB. However, the use of gold element …
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Economic aspects of materials substitution in horizontal automotive body panels : the issue of SMC surface finish
Thesis: M.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1991
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Effect of binder drop placement strategy on surface finish of fine ceramic parts by 3D printing
… Printing (3DP) including dimensional control and surface finish of the printed part. In the creation of structural ceramic parts by 3D printing, fine powders on the order of 1 gm in size must be used. These powders are deposited as slurry and then dried to form a fairly hard cohesive powder bed. …
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Interfacial reaction between SAC305 and SAC405 lead-free solders and electroless nickel/immersion silver (ENImAg) surface finish
The different surface finish and solder size on printed circuit board strongly affect the formation of intermetallic compounds (IMCs) and solder joint reliability. Among of various surface finish in the electronic industry, electroless nickel/immersion gold is the most popular at the moment. …
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Roles of surface finish and hydrogen availability on the tensile properties of 1018 steel in hydrogen environments
… charging. Specimens with three different surface finishes were tested at various cathodic charging current densities. The tensile deformation was initiated only after the specimen was charged to at least 95% with hydrogen. The data presented in this study show that very low cathodic …
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A radio-tracer study of the effect of surface finish on the transfer of polychlorotrifluoroethylene sliding on mild steel
The effect of surface finish on the transfer of polychlorotrifluoroethylene (PCTFE) to mild steel was studied using a radio-tracer technique. A pin-on-disk apparatus was used in conjunction with neutron activation of PCTFE to study the initial stages of transfer. Quantitative transfer and friction …
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The effect of surface roughness and surface finish on two-phase and single-phase heat transfer and pressure drop characteristics
… focused on enhancing boiling performance through surface structuring while simultaneously improving air-side heat transfer by innovative geometric modifications. This dissertation systematically investigates structured surface fabrication strategies including laser texturing, chemical etching, …
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The use of 3D surface analysis techniques to investigate the wear of matt surface finish femoral stems in total hip replacement
… of wear behind the loosening and failure of matt surface finish femoral stems. By examining stems which have been explanted from patients, a method of wear classification has been developed, and also 3D surface measurement techniques have been employed to quantify wear through parametric …
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Fretting Fatigue Characterization of Steel Bolted Connections
… life of the bolted connections, bolt preload and surface finish are considered primary. The main objective of this thesis was to characterize the fretting fatigue failure behaviour of slip-critical bolted connections made of high strength steel subjected to different axial stress ranges, …
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Empirical model-based control for end milling process
… model-based control mechanism to maintain a fine surface finish quality by maintaining on-line cutting force values. The proposed model has been developed to present the control model constraints, by varying the machining parameters to control the force output to be constant. To relate the surface …
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