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Articles 2311 - 2340 of 2632

Full-Text Articles in Materials Science and Engineering

A Study Of Certain Properties Of A Cobalt-Chromium-Manganese Alloy For High Temperature Service, Robert Lewis Ray Jan 1947

A Study Of Certain Properties Of A Cobalt-Chromium-Manganese Alloy For High Temperature Service, Robert Lewis Ray

Masters Theses

"The vast amount of attention that has been given to the development of high-temperature service alloys since about 1940 has resulted in the production of numerous compositions for many elevated temperature applications. Particularly in the aircraft industry, with the jet engine, and the power industry, with the gas turbine, have these applications been most demanding. War research has developed a large number of high-temperature service alloys, many of which are in use today, and the alloy ingredients vary widely...it may be readily be seen that there is no one alloy, or one system of alloys which has been developed that …

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An Investigation Of Various Properties Of The 60co-40cr Alloy, Roger David Moeller Jan 1947

An Investigation Of Various Properties Of The 60co-40cr Alloy, Roger David Moeller

Masters Theses

"The binary alloys of Co-Cr have had a few practical applications in our modern economy due to their high cost. The only extensive field of application has been developed in recent years in the manufacture of high temperature alloys for such equipment as gas turbines, jet engines, and turbo-superchargers. The use of these materials has been limited, due to their high cost, to small parts such as rotor blades in gas turbines. To reduce cost and to add desirable or eliminate undesirable properties, the binary alloys have, from the beginning, been modified with varying amounts of other metals. The modified …

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Effect Of Chromium, Molybdenum, Tungsten, And Vanadium Additions On The Physical Properties Of 1.4 Percent Titanium-Copper, Edward Palmer Patterson Jan 1947

Effect Of Chromium, Molybdenum, Tungsten, And Vanadium Additions On The Physical Properties Of 1.4 Percent Titanium-Copper, Edward Palmer Patterson

Masters Theses

"Titanium, an element reported to be ninth most abundant of the elements in the earth's crust, has received very little experimental attention as an alloying element in non-ferrous metallurgy. In copper, titanium produces an age-hardening effect, which makes it of great value to copper manufacturers of fabricated products. Yet, but a handfull of men have investigated the copper-titanium equilibrium diagram, and the titanium rich portion of the diagram still remains a mystery. No work has been done on ternary alloys of copper-titanium to this date, as far as recorded information is concerned, and it is hoped that the present work …

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The Solubility Of Copper In High-Iron And Low-Iron Slags, Charles Burroughs Gill Jan 1947

The Solubility Of Copper In High-Iron And Low-Iron Slags, Charles Burroughs Gill

Masters Theses

"A thesis giving the details of construction of a rotating induction furnace and its use to experimentally determine the amounts of copper absorbed in high-iron and low-iron slags at various temperatures. A rotating induction furnace is advantageous for slag study in that the slag is contained in a molten pure metal cup and does not come in contact with any refractory, which would be attacked by the slag and contaminate it. The molten pure metal cup is formed by melting the pure metal in a refractory crucible and spinning this inside an induction coil. The induction coil supplies heat for …

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An Investigation Into The Adaption Of The Induction Furnace For Determining The Equilibrim Diagram Of The System Cu2s-Fes, John R. Cole May 1946

An Investigation Into The Adaption Of The Induction Furnace For Determining The Equilibrim Diagram Of The System Cu2s-Fes, John R. Cole

Bachelors Theses and Reports, 1928 - 1970

This investigation was started in an effort to find an accurate and efficient method of determining the freezing points of ferrous and cuprous sulphides, mixtures of the two substances, and from this to establish the liquidus line of the equilibrium dia­gram.

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Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden May 1946

Economic Talc Deposits Of Montana And Related Firing Problems, Charles J. Lyden

Bachelors Theses and Reports, 1928 - 1970

This thesis has to do with a study of the produc­tion of talc in Montana, describing the local geology of each deposit, and a description of the laboratory tests that were made on various grades of Montana talc in an attempt to determine why some grades of talc can be burned in solid forms while others must be ground, mixed with a binder and molded.

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A Preliminary Investigation Of The Hydrometallurgy Of Philipsburg Manganese, W. L. Goodman May 1946

A Preliminary Investigation Of The Hydrometallurgy Of Philipsburg Manganese, W. L. Goodman

Bachelors Theses and Reports, 1928 - 1970

In the past the steel industry of the United States has depended almost wholly on imports for its supplies of manganese. Although it is well known that there are enormous deposits of low grade manganese ore in the United States the production of substantial amounts of ferro-grade mater­ial from domestic sources presents a field for con­structive and practical research.

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Flotation Of The Oxidized Ores Of Zinc, Fred Henry Bunge Jan 1946

Flotation Of The Oxidized Ores Of Zinc, Fred Henry Bunge

Masters Theses

"There is no satisfactory method of concentrating the finely disseminated oxide ores of zinc. Gravity methods of concentrating such ores may be used for coarsely crystalline materials in which the zinc material is free at approximately 10- to 35-mesh or coarser. In addition, gravity methods of concentration do not give a satisfactory separation on those ores in which the gangue mineral is small. As a result there is need for a method of beneficiating various deposits of oxidized zinc ores. The two commercially important oxidized zinc minerals under consideration are smithsonite, the zinc carbonate and hemimorphite, frequently referred to as …

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The Age Hardening Of Copper-Manganese-Nickel Alloys, William James Barnett Jan 1946

The Age Hardening Of Copper-Manganese-Nickel Alloys, William James Barnett

Masters Theses

"The Bureau of Mines in conjunction with their Electrolytic Manganese Alloys program has developed a series of age hardening copper-manganese-nickel alloys having properties which compare favorably with those of copper-beryllium alloys...An unusual and highly desirable characteristic of these alloys is their insensitiveness to rate of cooling from the solution temperature. Air cooled and water quenched samples will have identical time hardness curves on being aged. Instead of requiring closely controlled conditions characteristic of many age hardening alloys, these alloys cannot be subjected to a thermal mechanical handling which will prevent hardening on their being subsequently heated to the aging temperature. …

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Permability And Porosity Of Devonian Dolomites In Northwestern Montana, Jack W. Nordquist Jun 1945

Permability And Porosity Of Devonian Dolomites In Northwestern Montana, Jack W. Nordquist

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to record data per­taining to porosity and permeability derived from physical tests performed on Devonian dolomites occurring in northwestern Montana, and to subsequently summarize the results obtained as an aid in determining the possibility of those dolomites being suitable reservoir rocks for oil and gas accumulation.

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Vermiculite, Occurence, Character, And Concentration Of Mineral From The Pony District, Madison County, Montana, A. Saterdal Jun 1945

Vermiculite, Occurence, Character, And Concentration Of Mineral From The Pony District, Madison County, Montana, A. Saterdal

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to investigate the occurrence and character of the vermiculite deposits approximately four miles northwest of Pony; Madison County, Montana. The deposits are situated in rolling foothills at the northern end of the Tobacco Root Mountains.

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The Examination And Treatment Of Industrial Magnesium Foundry Wastes, Oden Cass Garst Jan 1945

The Examination And Treatment Of Industrial Magnesium Foundry Wastes, Oden Cass Garst

Professional Degree Theses

"The principle forms of magnesium foundry wastes not recovered by industry are fine dusts, such as, sawdust, rotary filings and grindings, and the melting- and refining-pot drosses. The Bureau of Mines has studied waste generation and has developed processes for the treatment of dresses for the recovery of secondary ingot metal and has also developed processes for the mechanical beneficiation of fine dusts. The studies on fine dusts were continued until suitable melting methods for the recovery of ingot metal, approximately meeting the applicable specifications, were developed...Recommendations are made for improved melting methods for magnesium sawdust that increase greatly the …

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The Solubility Of Zinc Ethyl Xanthate In Water, Thomas M. Mckenzie Oct 1944

The Solubility Of Zinc Ethyl Xanthate In Water, Thomas M. Mckenzie

Bachelors Theses and Reports, 1928 - 1970

A determination of the solubility of zinc ethyl xanthate was attempted by measuring the refractive index of a saturated solution of that salt. The small increment in refractive index effected by adding zinc ethyl xanthate to water in saturation quantities rendered measurements difficult and of dubious accuracy.

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Hydrogen Overvoltage Of Cadmium Bismuth And Antimony Bismuth Alloys, Edwin W. Stevens Oct 1944

Hydrogen Overvoltage Of Cadmium Bismuth And Antimony Bismuth Alloys, Edwin W. Stevens

Bachelors Theses and Reports, 1928 - 1970

A method to measure hydrogen overvoltage was devel­oped and checked with metals of known overvoltage. Alloys of bismuth and antimony and of bismuth and cad­mium were prepared and their overvoltages determined.

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The Electrodeposition Of Copper-Cobalt Alloys, Richard L. Dunn Oct 1944

The Electrodeposition Of Copper-Cobalt Alloys, Richard L. Dunn

Bachelors Theses and Reports, 1928 - 1970

An attempt was made to deposit a 50:50 copper-cobalt alloy from various sulfate electrolytes. No true 50:50 alloy was obtained but various mixtures of cobalt and copper rich crystals were deposited.

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Fluorite Near Silver Bow, Montana, Charles V. Campbell Feb 1944

Fluorite Near Silver Bow, Montana, Charles V. Campbell

Bachelors Theses and Reports, 1928 - 1970

The wartime demand for fluorspar has caused renewed interest in fluorite deposits. Near Silver Bow, Montana, a deposit of massive, coarsely crystalline fluorspar, which has not been described in the literature, has attracted the atten­tion of the United States Geological Survey.

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The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty Feb 1944

The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to elucidate this phenomena of frother incompatibility, and to offer an explanation based upon several divergent lines of investigation. The research was limited to four common frothing agents, namely, pine oil, n-amyl alcohol, sodium oleate, and sodium lauryl sulphate (Dreft).

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Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews Feb 1944

Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews

Bachelors Theses and Reports, 1928 - 1970

This thesis is concerned primarily with the production of metal powder compacts of iron and tin. In producing these compacts, the effects of process­ing variables on some of the essential properties of the pellets made were investigated.

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Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr. Feb 1944

Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr.

Bachelors Theses and Reports, 1928 - 1970

Although powder metallurgical methods have been used for years to fabricate tungsten and platinum, very little scientific data have been recorded until the beginning of this century. A large percentage of all commercial production at present is based upon past practice rather than upon scientific knowledge.

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Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk Feb 1944

Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk

Bachelors Theses and Reports, 1928 - 1970

The original objective of this project was to determine the effect of varying current intensity and electrode coating composition upon the spatter losses and porosity of arc welds made by alternating current. This subject was suggested by the Welding Research Council of the Engineering Foundation, which is a clearing house for welding research in order to avoid du­plication of work.

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Age Hardening Of Copper Antimony Alloys, William R. Stern Feb 1944

Age Hardening Of Copper Antimony Alloys, William R. Stern

Bachelors Theses and Reports, 1928 - 1970

A large number of alloys of varying percentages of copper and antimony were prepared. These alloys were treated in various ways which might be expected to produce age hardening. The effect of cold working was studied in the range where the alloys were malleable.

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The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien Feb 1944

The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien

Bachelors Theses and Reports, 1928 - 1970

An electrodeposition of an iron-manganese alloy was made from the same conditions determined by previous re­search. Various addition agents were experimented with in an attempt to produce better conditions for electro-deposition. It was found advantageous to add small a­mounts of sodium lauryl sulfate and ammonium sulfite to the electrolyte.

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An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry Feb 1944

An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry

Bachelors Theses and Reports, 1928 - 1970

Recent demands for petroleum to carry on the war effort have resulted in widespread prospecting in the northern Great Plains. Nearly all oil wells now drilled are of a depth to penetrate the marine Jurassic formations. It is known that these strata differ in thickness from place to place, but information of distribution, thickness, and lithology has not yet been compiled.

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Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson Jan 1944

Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson

Bachelors Theses and Reports, 1928 - 1970

A nickel plating operation for magnesium alloys was investigated and proved successful in plating a small sample of a typical commercial magnesium alloy, Dowmetal J1.

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Flotation Of A Complex Sulphide Ore Containing Tetrahedrite, James C. O'Dea, Lorimer W. Hoar Jun 1943

Flotation Of A Complex Sulphide Ore Containing Tetrahedrite, James C. O'Dea, Lorimer W. Hoar

Bachelors Theses and Reports, 1928 - 1970

The ore investigated in this thesis is a zinc-copper-lead ore. Microscopic analysis of this complex sulphide ore showed it to contain pyrite, sphalerite, arsenopyrite, galena, chalcopyrite, tetrahedrite, and covellite, with quartz as the gangue constituent.

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The Electrodeposition Of Chromium From Trivalent Salt Solutions, Bahri Ersoz May 1943

The Electrodeposition Of Chromium From Trivalent Salt Solutions, Bahri Ersoz

Bachelors Theses and Reports, 1928 - 1970

The enormous number of previous experiments and researches for the improvement of the commercial chromic acid bath, did not succeed even in the partial elimination of any one of the disadvantages of chromic acid bath. This led the author to believe that the poor performance is an inherent quality of the chromic acid bath, and is due to the fact that the deposition occurs from the higher state of oxidation.

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Bright Electroplating Of Copper In The Acid Bath, Elwood K. Jensen May 1943

Bright Electroplating Of Copper In The Acid Bath, Elwood K. Jensen

Bachelors Theses and Reports, 1928 - 1970

Plating of various objects with mirror-like surfaces of chromium, nickel, and other metals has expanded considerably during the past decade, and now ranks as an important enterprise, particularly with respect to the automotive industry.

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The Effect Of Boron On The Hardenability Of Steel, William J. Foy May 1943

The Effect Of Boron On The Hardenability Of Steel, William J. Foy

Bachelors Theses and Reports, 1928 - 1970

Many attempts have been made to improve iron and steel and their alloys by the addition of boron. The re­sults obtained were not encouraging for the reason that the amount of boron used, generally from 0.2 to 2.0 per cent is altogether too high. This percentage of boron ren­ders the product hard and brittle and of late the experiments with boron in this connection have been practically abandoned.

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An Attempt To Increase The Permeability And Porosity Of The Cut Bank Oil Sand By Treatment With Various Reagents, Donald H. Johnson May 1943

An Attempt To Increase The Permeability And Porosity Of The Cut Bank Oil Sand By Treatment With Various Reagents, Donald H. Johnson

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation was to attempt to find some means of increasing the effective porosity and permeabil­ity of the producing sands of the Cut Bank Oil Field, with the hope that thereby the ultimate recovery of petroleum from this field may be increased. Although the percentage increase in production thus effected would undoubtedly be small, it would represent a substantial volume of petroleum in view of the great quantity of oil and gas present in this field.

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Geology And Occurence Of Graphite At The Crystal Graphite Mine Near Dillon, Montana, Charles K.W. Hum Hum May 1943

Geology And Occurence Of Graphite At The Crystal Graphite Mine Near Dillon, Montana, Charles K.W. Hum Hum

Bachelors Theses and Reports, 1928 - 1970

The problem to be considered embraces the mineralogy and the mode of formation of a very pure and vein-like deposit of crystalline graphite. This deposit is of more than ordinary interest because in its geological relations and in the character of its graphite it shows many similarities to the famous deposits of Ceylon.

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