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Articles 1 - 30 of 412
Full-Text Articles in Metallurgy
Non-Destructive Material Analysis Of Metals And Composites Via Thermography, Jonathan R. Doubt, James L. Chapman
Non-Destructive Material Analysis Of Metals And Composites Via Thermography, Jonathan R. Doubt, James L. Chapman
Materials Engineering
The Naval Surface Warfare Center, Port Hueneme Division, is interested in the development of non-destructive damage assessment of shipboard materials via drones at distance. Long Pulsed Thermography (LPT), a method of non-destructive evaluation, was investigated as a possible method for detecting damage in metals (5005h24 Al alloy and 1008 carbon steel) and composites (aramid fiber honeycomb sandwich structure) at distances from 0.5 m to 3.0 m. LPT was conducted using two 1000 W can lights to heat the samples, and a FLIR E8-XT thermal camera. The images were then analyzed using ImageJ software to determine if damage could be detected …
The Investigation Of The Underlying Microstructure Associated With Fracture Features In 6061 Cold Sprayed Aluminum, Justin White
The Investigation Of The Underlying Microstructure Associated With Fracture Features In 6061 Cold Sprayed Aluminum, Justin White
UNF Graduate Theses and Dissertations
Cold gas dynamic spraying commonly known as cold spray is a process currently used for restoration, re-tolerancing, and application of coatings. With additional resources allocated towards the development of a through process model aimed at predicting the properties of bulk material produced via the Cold Spray process, more lab testing and investigation must be done to capture the effects of the varying microstructure in CS materials. The properties of ultra-fine-grained materials are derived from data collected from coarse grained materials and processes that do not accurately capture the effects as elevated strain rates and ultra-fine-grained materials. The lack of property …
Manipulation Of Surface Plasmon Resonance In Metal And Alloy Thin Films Using Dielectric Media, Benjamin Dubray Hall
Manipulation Of Surface Plasmon Resonance In Metal And Alloy Thin Films Using Dielectric Media, Benjamin Dubray Hall
Graduate Theses - Physics and Optical Engineering
Surface plasmon polaritons are coherent electron oscillations that propagate along an interface between a Drude metal and a dielectric medium. The excitation of polaritons is highly dependent on the dielectric properties of the metal, the thickness of the metal, and the optical properties of the dielectric material. First, plasmonic activity is assessed for several thicknesses of silver and nickel chromium under He-Ne incidence. Relationships between film thickness and metal dielectric function are explored in both cases. To manipulate the plasmonic activity at the silver surfaces, two methods are explored. Silver oxide was grown on the surface of the silver films, …
Evaluation Of Alternate Mouthpiece Material Types To Minimize Vibrations And Heat Loss - The Research And Execution Of Prototypes, Kristen Bobuk
Evaluation Of Alternate Mouthpiece Material Types To Minimize Vibrations And Heat Loss - The Research And Execution Of Prototypes, Kristen Bobuk
Theses, Dissertations and Capstones
This paper is based on the idea of current horn mouthpieces being made solely out of brass with a limited market of stainless steel and titanium with plating being silver or gold. This is an opportunity to explore alternate materials; specifically steel, cast iron and aluminum for the base material and chrome, copper and nickel for plating materials. Readers will learn about metal properties such as hardness, thermal conductivity and specific heat and learn why certain materials are more beneficial than others.
Shielding Effectiveness Of Superalloy, Aluminum, And Mumetal Shielding Tapes, Cindy Suit Cheung
Shielding Effectiveness Of Superalloy, Aluminum, And Mumetal Shielding Tapes, Cindy Suit Cheung
Master's Theses
Using MIL-HDBK-419A, MATLAB and Nomographs, Shielding Effectiveness for the Magnetic Field, Electric Field, and Plane Wave were calculated over a frequency range from 10 Hz to 1 GHz. The three shielding tapes used included superalloy, aluminum, and mumetal. Calculations for Shielding Effectiveness involve the computation of Absorption Loss, Reflection Loss, and Re-Reflection Correction Factor. From the outcome of the calculations, it was suitable to conclude that all three metals fulfill the 40 dB Shielding Effectiveness requirements for SGEMP fields for frequencies greater or equal to 1 MHz. Accordingly, all three shielding tapes provide at least 40 dB of shielding to …
Studies In Modulation Of Interfacial Reactions For Certain Sulphide Minerals, Robert Owen Beyaert
Studies In Modulation Of Interfacial Reactions For Certain Sulphide Minerals, Robert Owen Beyaert
Bachelors Theses and Reports, 1928 - 1970
No abstract provided.
Preliminary Examination Of The Aluminum Corner Of The Ternary System Aluminum-Silver-Indium (A1-Ag-In), Jerome J. Blake
Preliminary Examination Of The Aluminum Corner Of The Ternary System Aluminum-Silver-Indium (A1-Ag-In), Jerome J. Blake
Bachelors Theses and Reports, 1928 - 1970
In this paper the author attempts to lay the groundwork for future work on the Al-Ag-In system.
Production Of Standard-Grade Ferromanganese In An Electric Arc Furnace, Force F. Baney Jr.
Production Of Standard-Grade Ferromanganese In An Electric Arc Furnace, Force F. Baney Jr.
Bachelors Theses and Reports, 1928 - 1970
The investigations conducted in this project were essentially concerned with the effects of various compositions of two different slag systems upon the increased recovery of manganese in a standard-grade ferromanganese.
Investigation Of The Ternary System Silver-Aluminum-Indium (Ag-Al-In), Elvin H. Beardslee
Investigation Of The Ternary System Silver-Aluminum-Indium (Ag-Al-In), Elvin H. Beardslee
Bachelors Theses and Reports, 1928 - 1970
This thesis paper contains material pertaining to & preliminary investigation of the ternary system Ag-Al-In. Procedures in this preliminary investigation are discussed in detail.
Crystal Habit Modification Of Sodium Chlorate, Michael R. Keegan
Crystal Habit Modification Of Sodium Chlorate, Michael R. Keegan
Bachelors Theses and Reports, 1928 - 1970
All single crystals have a particular habit or morphology. The crystal habit refers to the relative degree of development of crystallographic planes into surfaces which make up the external appearance of the single crystal.
In this paper, NaClO3 is used as a parent crystal. Its simple cubic habit is modified to tetrahedral by the use of impurities of SO4=, S2O3=, Cr2O7=, and NO3-. The degree of habit change is studied as a function of impurity concentration and temperature. The problem and phenomena are explained in terms of surface chemistry and thermodynamics.
Physico-Chemical Principles Of Sixteenth Century Metallurgy, Robert E. Johnson
Physico-Chemical Principles Of Sixteenth Century Metallurgy, Robert E. Johnson
Bachelors Theses and Reports, 1928 - 1970
Following a review of sixteenth century metallurgical literature and a discussion of Gibbs free energy, this thesis discusses thermodynamic considerations of galena (PbS) reduction by iron from a lead assay of this period. The importance of fluxes in this assay is emphasized. The discussion covers both equilibrium and non-equilibrium conditions at 1100 degrees Celsius. Possible substitutes for iron are also covered.
Information from twenty-one small controlled lead assays is correlated with the thermodynamic discussion to determine the purpose of each constituent in the assay.
The Beneficiation Of Titaniferous-Magnetite Sands, Ronald Lloyd Nordwick
The Beneficiation Of Titaniferous-Magnetite Sands, Ronald Lloyd Nordwick
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation of beneficiation methods is to develop and study possible economic methods for recovering an iron-titanium concentrate of sufficient purity to meet metallurgical requirements for subsequent direct reduction to pig iron and a high titanium slag.
Stress-Corrosion Cracking Of Brass, Paul A. Fossey
Stress-Corrosion Cracking Of Brass, Paul A. Fossey
Bachelors Theses and Reports, 1928 - 1970
the mechanism of stress-corrosion cracking of brass has been sought for many years. Investigators have proposed many mechanisms, but each of these mechanisms has always had several drawbacks. This paper presents an account of experimental work done in the laboratory on this subject and compares it to the work of previous investigations. It evaluates the mechanisms presented by investigators and shows the failures of these mechanisms. A theory of Nitrogen Embrittlement is presented and an evaluation of this theory with experimental work follows.
Experimental Arc Furnace Smelting Of Titaniferous Iron Sands From The Northern Oregon Coast, Allan P. Herring
Experimental Arc Furnace Smelting Of Titaniferous Iron Sands From The Northern Oregon Coast, Allan P. Herring
Bachelors Theses and Reports, 1928 - 1970
This investigation is an attempt to experimentally smelt titaniferous iron sands from the Northern Oregon Coast in a laboratory arc furnace.
The Effect Of Ph Upon Chelation Reactions In Montmorillonite Clays, Joseph Michael Keane
The Effect Of Ph Upon Chelation Reactions In Montmorillonite Clays, Joseph Michael Keane
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis is to investigate several chelation reactions and determine the effect of variable pH upon these reactions.
An Investigation Of The Sintering Of Iron-Wire Compacts, George L. Vivian
An Investigation Of The Sintering Of Iron-Wire Compacts, George L. Vivian
Bachelors Theses and Reports, 1928 - 1970
A study of the sintering of iron has been made by observing the rate of bonding of iron wires wound on iron spools. The specimens were sintered at a constant temperature of 850c in vacuum furnaces capable of producing pressures of 10-5 to 10-4 mm of mercury, and the growth of the bond between wires was observed as a function of time.
It has been concluded that the volume-diffusion mechanism is strongly operating in the sintering of iron at 850c, but in an evacuated system, the evaporation-condensation mechanism also contributes to the sintering process.
The Identification Of Montana Clays By X-Ray Analysis, David Stephen Malyevac
The Identification Of Montana Clays By X-Ray Analysis, David Stephen Malyevac
Bachelors Theses and Reports, 1928 - 1970
The purpose of this study is to identify the various Montana clay minerals by means of X-ray diffraction. The ultimate aim of this investigation is to identify the different clay mixtures through an analysis of their respective diffraction patterns, and diffraction patterns obtained after various chemical and thermal treatments.
Investigation Of Inclusions In Armco Ingot Iron, Edwin J. Duncan
Investigation Of Inclusions In Armco Ingot Iron, Edwin J. Duncan
Bachelors Theses and Reports, 1928 - 1970
Various chemical and electrolytic separation methods were investigated in an attempt to separate the inclusions in Armco ingot iron. Residues obtained were X-rayed for identification purposes. The microstructures of this iron were studied with the object of determining the relative sizes, locations, and possible compositions of the inclusions.
The Design And Construction Of An Electrolytic Cell For Aluminum Reduction, Thomas H. Melrose
The Design And Construction Of An Electrolytic Cell For Aluminum Reduction, Thomas H. Melrose
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation was to design and construct a laboratory size electrolytic cell in which to reduce alumina, using the same basic materials that are used in a commercial size cell. The cell was designed to have a capacity of approximately 100 grams of metallic aluminum produced every 8 hours. The cell was constructed so it could be operated continuously.
Effect Of Recovery On The Recrystallized Grain-Size Of High Purity Aluminum, Rodney L. Helterline
Effect Of Recovery On The Recrystallized Grain-Size Of High Purity Aluminum, Rodney L. Helterline
Bachelors Theses and Reports, 1928 - 1970
When a cold-worked metal is annealed, it’s physical properties hange as a result of a new grain structure. The annealing treatment is divided into three stages according to the changes that occur in the distorted metal: (1) recovery, (2) recrystallization, and (3) grain growth.
Geology Of The Ragged Point Oil Field Musselshell County, Montana, David M. Amos
Geology Of The Ragged Point Oil Field Musselshell County, Montana, David M. Amos
Bachelors Theses and Reports, 1928 - 1970
The Ragged Point oil field is located in Northwest Musselshell County, in the Lake Basin field of central Montana, and on the western border of the Great Plains region. The surface topography is that of a plain marked by erosion and moderate folding. The stratigraphy of central Montana shows periodic marine invasions from the Cordilleran trough, with normal marine limestones interbedded with sandstone sand shales. These sediments are over 12,000 feet thick, with the Cretaceous Eagle and Colorado formations exposed at the surface on the Ragged Point anticline. Undifferentiated Cambrian limestones and shales are the oldest rocks encountered in drilling.
Polarography Of Indium, John Jackson
Polarography Of Indium, John Jackson
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis is to study the various aspects of the polarography of indium. The eventual goal would be to develop a method of analyzing indium in unknowns. The investigation is approached by studying the indium ions in various electrolytes and in various concentrations.
The Application Of Electric Energy To The Metallurgy Plants In Montana, Edwin J. Duncan
The Application Of Electric Energy To The Metallurgy Plants In Montana, Edwin J. Duncan
Bachelors Theses and Reports, 1928 - 1970
Since the year 1800, metallurgy has been affiliated with electricity. In fact, the two industries have grown side by side, being naturally dependent upon each other and having a parallel growth.
The Construction And Operation Of A Universal Specimen Mount With Protective Lead Shield For The Purpose Of Determining Pole Figures Using The Schulz-Decker Transmission Technique, Richard L. Fausner
The Construction And Operation Of A Universal Specimen Mount With Protective Lead Shield For The Purpose Of Determining Pole Figures Using The Schulz-Decker Transmission Technique, Richard L. Fausner
Bachelors Theses and Reports, 1928 - 1970
It was the purpose of this study to construct a universal mount, to construct a protective lead shield, to operate the instrument, and to provide a pole figure using the transmission method of Schulz and Decker. There are at present several lengthy x-ray methods of determining the grain orientation of metals. These methods are mainly photographic. In order to provide a rapid means of obtaining the necessary information concerning the grain orientation of a metal, a universal mount was constructed.
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
The Lucky Hit Mine Of Jefferson County, Montana, Bruce B. Goddard
Bachelors Theses and Reports, 1928 - 1970
Many mines in the Cardwell Mining District have been more or less steady producers of gold, silver, lead and zinc since 18SO. The area first came into prominence with the discovery of gold at the Mayflower Mine in 1896. Soon after the Mayflower discovery, many claims were located in the nearby Saint Paul Gulch area, northeast of Whitehall. The Lucky Hit Mine is located in Saint Paul Gulch area of the Cardwell Mining District.
Nonmetallic Mineral Resources Of Montana (Except Fuels), F. L. Rytlewski
Nonmetallic Mineral Resources Of Montana (Except Fuels), F. L. Rytlewski
Bachelors Theses and Reports, 1928 - 1970
Essentially, the paper is composed of seven parts, each of which concerns a group of related nonmetallic minerals such as ceramic materials, gemstones, or abrasives. Following the data pertaining to the minerals of each group are index mars locating the major mineral deposits which are known to date. Production and reserve figures are listed by tables in cases where such information is available.
The Flotation Concentration Of A Complex Low-Grade Lead Zinc Ore, Edward James Fong
The Flotation Concentration Of A Complex Low-Grade Lead Zinc Ore, Edward James Fong
Bachelors Theses and Reports, 1928 - 1970
This report is concerned primarily with the beneficiation of a low-grade complex lead-zinc ore. The depletion of high grade veins has caused the mineral engineer to seek deposits deeper in the earth's crust or to find lower grade deposits. The other alternative has placed more research problems on Mineral Dressing Engineers in particularly the iron, copper, lead and zinc fields.
Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery
Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery
Bachelors Theses and Reports, 1928 - 1970
All of the information on the various districts has come directly from published reports. The investigation was suggested by Mr. Forbes Robertson. The geographical extent of the deposits was confined to the western United States. Many of these deposits are of the disseminated porphyry type. A few of the deposits, such as at Butte, Montana, were of the fissure vein type.
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Bachelors Theses and Reports, 1928 - 1970
One of the reasons why steel is the most versatile of all the metals available for engineering applications is because of the wide range of properties that can be obtained from it by proper heat treatment.
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Bachelors Theses and Reports, 1928 - 1970
As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to determine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.