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Materials Science and Engineering Faculty Research & Creative Works
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Full-Text Articles in Engineering
Effect Of Additives On Anomalous Deposition In Zinc-Cobalt Alloy Electrogalvanizing, H. M. Wang, Thomas J. O'Keefe
Effect Of Additives On Anomalous Deposition In Zinc-Cobalt Alloy Electrogalvanizing, H. M. Wang, Thomas J. O'Keefe
Materials Science and Engineering Faculty Research & Creative Works
Alloys of Zn-Co were deposited from sulphate electrolytes containing various additives to study their influence on the anomalous behavior of the reactions. The effects of antimony, germanium and arsenic on the Zn-Co alloy composition and structure were examined. The results showed that the composition and structure of Zn-Co alloys deposited could be dramatically changed by antimony, and to a lesser extent by germanium and arsenic. A concentration of Sb(III) as low as 5 mg dm-3 increased the cobalt content by a factor of approximately 3; however, the deposit morphology was very dendritic. Germanium additions nearly doubled the cobalt content and …
Characterization Of Phase Transformation Behavior In Electrolytically Produced Indium-Thallium Shape Memory Alloy Films, Chong Ho Sonu, Thomas J. O'Keefe
Characterization Of Phase Transformation Behavior In Electrolytically Produced Indium-Thallium Shape Memory Alloy Films, Chong Ho Sonu, Thomas J. O'Keefe
Materials Science and Engineering Faculty Research & Creative Works
Indium-thallium alloys in the range 15-38 at. % Tl were electrodeposited from a sulfate electrolyte by using pulsed current. The relationship between composition and phase structure of the alloys deposited was investigated with regard to the shape memory effect. To date there have been no reported experimental studies describing the electrodeposition of InTl alloys capable of undergoing such transformations. Not only did the deposited alloys exhibit the shape memory effect, but the composition-phase relationship exhibited was shown to deviate from that reported for alloys in an equilibrium condition. The results show that the temperature and the temperature interval for the …
Density Changes During Isothermal Annealing Of A Quenched Pb–7.45 At% Sn Alloy, Hollis P. Leighly, A. Belaidi
Density Changes During Isothermal Annealing Of A Quenched Pb–7.45 At% Sn Alloy, Hollis P. Leighly, A. Belaidi
Materials Science and Engineering Faculty Research & Creative Works
The increase in density of a Pb–7.45 at% Sn alloy annealed at 150, 165, 180, and 195 °C and quenched at 20, 21.5, 23, 25, and 30 °C is measured isothermally. This increase in density accompanies the formation of the Sn‐rich phase precipitating as a function of time at the quenching temperature. The quenching is rapid enough to retain some vacancies at equilibrium at the annealing temperature. These vacancies accelerate the early stages of precipitation. The change in density versus time obeys the kinetic law allowing the determination of the reaction rate constant for several annealing and quenching conditions. Copyright …
Positron Annihilation Determination Of Damage Caused By Fatigue Cycling In The Superalloy Haynes 188, D. Hoeckelman, Hollis P. Leighly
Positron Annihilation Determination Of Damage Caused By Fatigue Cycling In The Superalloy Haynes 188, D. Hoeckelman, Hollis P. Leighly
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.