Engineering Commons^™

A Study Of The Difference Effects On Alpha Solid Solutions Of Oxygen In Titanium Dissolving In Hydrofluoric Acid, Kuo-Chin Chuang

Masters Theses

"Alpha solid solutions of oxygen in titanium dissolving in hydrofluoric acid exhibited a positive difference effect with k values of 5.7, being independent of the concentration of HF, within the compositional range studied 0 to 5 w/o oxygen. This indicates that various TiO_x alloys are polarizable to the same extent by the same strength of anodic current in hydrofluoric acid.

The difference effect observed on TiO_x alloys dissolving in HF-HCl revealed that the effect is dependent on the oxygen content of the solid solution as well as on the concentration of HCl. The presence of HCl results in …

Scatter Matrix Analysis Of Plane Waves In A Layered Media, Bill W. Ashworth

Masters Theses

"The problem was the application of matrix theory to the solution of the reflection and transmission coefficients for a plane wave incident on a layered media. Background material relating to the problem was reviewed. Equations that were used in the solution of the problem were either derived or explained. The derivations for the reflection and transmission coefficients were carried out in order, starting with the simple case of normal incidence on a junction of two infinite media and progressing through the more difficult case of oblique incidence on a layer of finite thickness separating two infinite media. Scatter matrix analysis …

A Resistivity Study Of Hot Short Ferrous Alloys, Harold Alfred Koelling

Masters Theses

"Resistivity measurements were performed at elevated temperatures on four special ferrous alloys and one commercial iron. The alloys were pure iron, iron with .023 per cent sulfur, iron with .33 copper, iron with .32 copper and .024 sulfur. Other elements were held to the minimum amounts possible in order to determine the actual effects of sulfur and copper. The commercial alloy was Armco Iron.

Measurements of resistivity versus temperature were taken at slow heating rates to determine if the iron sulphide liquid film formed in the grain boundaries of red-short steels had any effect on the electrical resistivity"--Abstract, page 7.

Tank Studies Of The Resistivity Horizontal Profiling Method Of Electrical Prospecting, Edward Hornsey

Masters Theses

"This research project was undertaken to perfect a technique whereby theoretical horizontal resistivity profiles could be reproduced in laboratory tank studies.

Several specimen materials were tried and finally an acceptable specimen material was found. It was found that carbon specimens suspended in salt water would give horizontal resistivity profiles that agree to a remarkable degree with the theoretically predicted curves.

The investigations showed that the depth of burial of the specimen has a marked influence on the position of the characteristic edge effects and on the magnitude of the apparent resistivity.

The studies also indicated that successful tank studies could …

A Preferred Orientation Study Of Sheet Formed By Rolling Copper, Nickel, Titanium And Tungsten Metal Powders, Martin Franklin Marchbanks

Masters Theses

"Pole figure scans of strip rolled from copper, nickel, titanium, and tungsten metal powders were made on samples taken across the width of the strip, and with various amounts of surface material removed, to determine if any preferred orientation existed. No preferred orientation was found in any of the samples examined.

The method used was a modification of the Schultz technique, using the Norelco Pole Figure Fixture, whose geometry and operation is described, in conjunction with the Norelco diffractometer.

Defocusing resulting during the run of a pole figure is discussed and a method for reducing this defocusing is described.

The …

An Evaluation Of The Addition Of Magnesium Carbonate To Promote Collapsibility In Sodium Silicate Bonded Cores, Wilfred Durairajan Paul

Masters Theses

"Cores are separate sand masses included in the mold to accomplish shapes that would be impossible or difficult to obtain with a normal simple mold cavity.

For example a core made for a pipe casting is expected, first, to support itself when placed in the mold and also withstand handling at room temperature. Second, it should withstand, for a short time, the high temperature of molten metal. Last, it should possess the ability, to completely lose its strength just after the metal around it has completely solidified.

Until recently cores for castings were made using oil bonded sands, with an …

The Effects Of Sulphur And Copper On Hot-Workability Of Pure Iron, Hung-Chi Chao

Masters Theses

"The independent effects of sulphur, copper and their combinations on the hot-workability of pure iron free from other elements was studied, with special emphasis on the red-short phenomenon. Electrolytic pure iron with the addition of 0.023 cent sulphur, 0.33 per cent copper and 0.024 per cent sulphur plus 0.032 per cent copper along with a heat of only electrolytic pure iron was melted under vacuum, and cast under helium pressure. The specimens machined from the forged bars were tested at various temperatures by the hot twist-test and by the constant energy single blow drop forging test to evaluate the hot-workability …

A Study Of Invert Emulsion Drilling Fluids, Edward R. Tegland

Masters Theses

"Since invert emulsions are being applied as drilling fluids to cope with special drilling and completion problems, evaluations of existing and new types of emulsions are needed. Three types of emulsions are evaluated in this study: (1) type A emulsions prepared with a commercial emulsifier, (2) type B emulsions prepared by adding clay to the external phase, and (3) type C emulsions containing no externally added emulsifier.

Standard testing procedures were used to measure the viscosity and filtration properties of the emulsions studied. Interfacial tension measurements were made using a technique described in the literature. The degree of stability for …

Use Of Light-Weight Steel Strapping As External Reinforcing To Concrete Beams, John O. Buchanan

Masters Theses

"As a result of some recent failures in reinforced concrete construction throughout the United States, a study was made by several national authorities to find some remedial measures of strengthening existing structures without rebuilding. A system was developed, using high strength steel bands applied externally to beams, to act as stirrups, which has been highly successful. It not only greatly increased the strength of beams already in place but was used to repair members which had already failed.

The application of these bands was made under very exact specifications, using closely controlled procedures, with many physical refinements, in order to …

Transient Temperature Distribution In An Infinite Plate Subjected To Convection And Radiation Heat Exchange, Billy W. Marshall

Masters Theses

"The desired result of this paper is a method of calculating transient temperatures in an infinite plate. The resulting equations are general to the extent possible for aerodynamic heating and radiation boundary conditions. The possible methods of calculation were investigated, and it was felt that a numerical analysis presented the most feasible approach.

Numerical analysis was employed to arrive at a series of equations for calculating the temperatures at selected positions in an infinite plate. A study was then made to determine a method of solving these equations by means of some high speed computing device.

The equations were adapted …

A Study Of Viscous Frictional Effects And Relay Characteristics On The Operation Of A Positional Relay Servomechanism, Earl F. Richards

Masters Theses

"The thesis describes some experimentally observed data and analytical approaches to the study of a relay servomechanism. The experimental data were secured from an analog simulation of a relay servo system. The results of this data were compared to the transient approach by use of the phase-plane method. The stability of the system was determined using a describing-function. The analytical approaches are described in the presentation.

A study of the effects of viscous friction is described, and the characteristic of the relay used in the system is given special attention. The response to input driving function was considered, and rise …

A Systematic Study Of Experimental Parameters In A Cloud Chamber Search For Subionizers, Zin Aung

Masters Theses

"Since there is no theoretical basis for the quantization of electric charge, it is reasonable to consider the possible existence of particles with charges much less than the electronic charge ‘e’. Such particles, if they exist, are expected to ionize more lightly than the electron. Similar remarks hold true for particles with electric dipole moments, and relativistic monopoles with strengths much less than ’e’ electrostatic units. These particles have been termed subionizers.

The selection of apparatus for a subionizer search has been discussed. The desired conditions for such a search using a low background, long sensitive time Wilson cloud chamber …

Temperature Distribution In An Infinite Plate As A Function Of The Input Heat Flux, George Franklin Wright

Masters Theses

"It is the purpose of this thesis to investigate the effects of a variable input heat flux impinging equally on both sides, on the temperature distribution within an infinite plate. An infinite plate may be defined as one in which the dimensions are infinite in two directions and finite in thickness. For practical purposes such a plate could be thought of as one in which the thickness was small enough, compared to the other two dimensions, so that a temperature gradient exists only normal to the surfaces of the plate. This assumption will be made to establish one-dimensional heat flow …

Correlation Of Dust-Count Results By Zeiss Konimeter And Midget Impinger, Chandmal Jain

Masters Theses

"In this modern age, the scientific and technological developments have advanced mechanized mining to the status wherein the attendant dust problems have reached very serious hazard proportions. The significant roles, which have been perfected for the Zeiss konimeter and the midget impinger, in evaluating dust concentrations and thereby revealing possible improvements in making the atmospheric conditions safer, cannot be over emphasized.

While introducing the subject of this paper in the first chapter, the author has presented a historical resume, wherein he pointed out that performances of these instruments have not been correlated in the past. However, the work reported on …

Design, Construction And Operation Of Equipment For The Study Of Evaporation Of Aqueous Solutions Using A Simplified Reactor Design Approach, Virendra Kumar Mathur

Masters Theses

"The study of simultaneous heat and mass transfer in flow reactors has attracted the attention of many workers for a long time due to its wide application in the industrial field. These heat and mass transfer studies play an important role in determining the rate equations and in turn the size of the reactor itself. A large number of chemical reactions have been studied by various workers….

The purpose of this work comprised only the initial or exploratory phase of this overall project, and deals with the design, construction and assembling of the equipment necessary to carry out the vaporization …

A Heterocyclic Alkyd Resin, Bhailalbhai M. Patel

Masters Theses

" 'Alkyd’ is a word coined by Kienle in 1927 to designate a class of synthetic resins which include the complexes resulting from the reaction of polyhydric alcohols and resinifying carboxylic organic aromatic acids or their anhydrides. The word in a broad sense is generally considered to apply to many modifications of these resins - drying, semi-drying and non-drying oil-modified alkyds. It was derived from the words alcohol and acid by combining “al” and “cid” and for euphony changing the ”cid” to “kyd” – al(cid)kyd.

Compounds having rings composed solely of carbon atoms are called homocyclic compounds or carbocyclic compounds. …

A Method Of Estimating Groundwater Influx Into A Vertical Mine Shaft, Morris T. Worley

Masters Theses

"Prediction of groundwater influx into mine openings is one of the more important pre-development problems encountered in mining. A satisfactory method of estimation would provide the information necessary for a mining company to dewater prior to shaft sinking, pre-grout the shaft area, or plan pumping schemes to handle the expected flow.

A standardized field method of estimating groundwater supply from pumping test data was developed by O. V. Theis and others. In the present research problem, the estimation procedure has been simplified by the use of nomograms. Certain modifications in the estimate must be made when a pumping well is …

A Dissolution Rate Study Of Beryllium In Hydrofluoric Acid, Donald Lee Mathis

Masters Theses

"Beryllium was shown to react stoichiometrically with HF, HCl, and H₂SO₄ acids in accordance with a plus two valence. These reactions were investigated by the hydrogen evolution method.

Dissolution rates were determined in five concentrations, 0.01, 0.05, 0.10, 0.50, and 0,75 N, of HF acid at 10, 20, 30, 40 and 50°C, This was accomplished by the hydrogen evolution method and the results were based on the tested stoichiometry. Beryllium has a high dissolution rate in HF acid, which approximates the following under similar conditions: 10 times Al, 4 times Ti, and 1.5 times Zr. A kinetic …

A Geophysical Investigation Of An Area In Christian County, Missouri, Edwin J. Ballantyne Jr.

Masters Theses

"A vertical intensity magnetic survey of 144 square miles in Christian County, southwest Missouri revealed an 825 gamma anomaly having a closure of 9 square miles. A three mile gravity traverse across the magnetic anomaly detected a positive gravity anomaly in excess of six mllligals.

Calculations showed that a Precambrian hill large enough to cause the observed magnetic anomaly would outcrop at the surface. Because Precambrian rocks are known to be buried under a sedimentary layer, this hypothesis was rejected.

Theoretical anomalies of several geometrical bodies at calculated depths were visually compared with the measured magnetic and gravity profiles. A …

A Follow-Up Study Of Industrial Technology Graduates From Western Michigan University, Dale Donald King

Masters Theses

Chapter I

The Problem and Its Setting

During the past few years, nationally prominent industrial and educational leaders have been concerned with the present shortages of engineers and technically trained personnel. These leaders appear to be concerned with the utilization of manpower and in present and future educational patterns which will insure an ample supply of technically competent personnel.¹

Staff members of Western Michigan University are also concerned with the technician. In fact, 243 students were graduated from thirteen Industrial Technology curriculums during the period of 1955 through 1959. It is believed that the school has been effective in …

A Study Of The Inlet Characteristics And Entrance Losses Of Pipe Culvert With A Flush Mounted, Sharp Edged Inlet, Luke Lea Callaway Jr.

Masters Theses

"Of all hydraulic structures, culverts are by far the most numerous. Lack of understanding of the functioning of culverts has resulted in many of them being implaced improperly and as a result, they function with less efficiency and at reduced capacity. Much has been written regarding the flow of water in open channels, culverts included, but little has been done regarding inlet conditions. It is necessary in the design of culverts, as with any other structure, that conditions which govern the operation of the structure be established. This paper is a study of the inlet conditions of a circular cross …

A Method Of Design For Spiral Reinforced, Eccentrically Loaded, Concrete Columns, Lloyd O. Senter

Masters Theses

"This thesis presents a method of designing spiral reinforced, eccentrically loaded, concrete columns on the basis of the 1957 American Association of State Highway Officials specifications.

Equations from AASHO, in conjunction with equations derived in this thesis, are programmed for and solved by the IBM 650 digital computer. The data obtained from the computer is plotted such that, given the normal load and moment on a column, the minimum required area or reinforcing steel may be read directly from the graph.

The derivation or equations, the computer program, and the graphs are included in the thesis"--Introduction, page 1.

Heat Transfer Coefficients In Artificially Roughened Pipes, Mehmet Hayati Turan

Masters Theses

"The purpose of this investigation is to determine experimentally the effects of three different types of artificial roughness on the convective heat transfer coefficient in a pipe and compare these values with that for a smooth pipe for turbulent flow"--Introduction, page 7.

Temperature Distribution In A Semi-Infinite Solid As A Function Of The Input Heat Flux, Lloyd Carl Laciny

Masters Theses

"In this thesis the problem of varying heat flux into a semi-infinite solid initially at zero temperature is investigated. Varying heat flux means that the heat transferred to the solid by its surroundings is a function of time; in this particular problem it is chosen to be an exponential function of time. A semi-infinite solid is one which is bounded by only one plane.

This subject has achieved considerable importance in the field of space technology. A body in space is beyond the realm of aerodynamic heating and non-uniform skin temperatures reached as a result of radiation from a high …

Some Dynamic Creep Characteristics Of Gypsum, Ikram-Ul-Haq Dar

Masters Theses

"A review of literature concerned with time-dependent deformation of geologic and non-geologic materials is presented. A static loading machine and a four unit dynamic loading unit was designed and assembled to evaluate static and dynamic creep properties of gypsum. The tests were run for various levels of static loads, and superimposed dynamic loads. Investigations were carried out to determine the relationships, if any, between impact energy, impact velocity and momentum, and dynamic strains. Viscoelastic coefficients were determined for the investigations. The conclusion was presented that time-dependent strain in the dynamic creep tests of the particular gypsum rock tested is a …

Heat Transfer In A Vortex Flow Metal To Air, Elisha Rachovitsky

Masters Theses

"In this study heat transfer in a vortex flow has been investigated experimentally and analyzed qualitatively.

Air was forced through a Ranque tube in order to get a swirling turbulent flow in its "hot" section. The test section, having a diameter of .355 inches and a length of 27.5 inches, was heated by an induction coil.

Three types of flow were under investigation: a linear turbulent flow, a vortex uniflow and a mixed vortex-linear turbulent flow.

The experiments covered a range of tube-wall temperature from 570 to 900 Deg. R and inlet pressure to the vortex generator ranged from 25 …

Methods For Calculating The Minimum Amortization Tonnage And Maximum Present Value For An Ore Body, Garrett M. Sainsbury

Masters Theses

"The discussion is divided into three parts. Part I describes a procedure for determining the mining rate that gives the minimum amortization tonnage required of an ore body, and the amount of that tonnage. The basic idea is that amortization tonnage is equivalent to the estimated capital costs, including interest, divided by the estimated operating profit per ton. Both capital costs and operating profit per ton can be expressed as functions of mining rate by making use of empirical equations. Therefore, amortization tonnage can be expressed as a function of mining rate. The amortization tonnage is calculated for a series …

High Temperature Oxidation Of Nickel, Virgil R. Friebel

Masters Theses

"Using a sensitive volumetric technique, a study was made of the kinetics of oxidation of nickel at 1200° C. and 1300° C. Three purities of nickel were used for the investigation which was limited to the initial three hours of reaction.

The rate of oxidation of nickel followed the parabolic rate law after an initial period of deviation which lasted up to 40 minutes. No direct correlation was found between the oxide thickness and the end of the period of deviation from the parabolic rate law.

The purity of the nickel was found to have a marked effect on the …

The Constitution Of Magnesium-Rich Magnesium-Zirconium Alloys, Kenneth Allen Fowler

Masters Theses

"The magnesium-zirconium system has been studied to 0.8 per cent zirconium which represents the limit of solubility of zirconium in liquid magnesium at 950°C. Alloys have been prepared by two methods of alloy additions, and the results compared. Microstructural studies have been made of the alloys in the cast, extruded, and heat-treated conditions. The limit of solid solubility has been determined on the basis of resistivity and temperature coefficient of resistivity measurements, as well as by metallographic examination, with good agreement. A secondary structure resulting from precipitation of a second phase within cored regions of the alloy has been studied …

The Redesign And Construction Of A Rotating Disc Contactor, Richard Henry Okenfuss

Masters Theses

"Liquid-liquid extraction has played a major role in the processing of nuclear fuels. The Department of Chemical Engineering of the Missouri School of Mines and Metallurgy realizing this, petitioned the Atomic Energy Commission for funds to design and construct an instructional facility representing the chemical processing of nuclear fuels. With this unit and its solvent recovery equipment, in which stress is placed on extraction and distillation, not only are the principles of nuclear fuels processing demonstrated, but the more basic concepts of mass and energy transfer are also illustrated. Extraction depends upon solubility differences to achieve a transfer of a …