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- Keyword
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- <p>Cast-iron -- Ductility<br />Decarburization of steel<br />Martensite</p> (1)
- <p>Lead -- Metallurgy<br />Lead sulfide<br />Sulfidation</p> (1)
- <p>Martensitic transformations<br />Bainitic steel<br />Iron-nickel alloys</p> (1)
- <p>Martensitic transformations<br />Iron-nickel alloys<br />Strains and stresses</p> (1)
- <p>Molding (Founding)<br />Metal castings<br />Aluminum alloys</p> (1)
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Articles 1 - 5 of 5
Full-Text Articles in Engineering
The Effect Of Gating On Soundness Of Al-Alloy Permanent Mold Castings, Dinesh Shantilal Patel
The Effect Of Gating On Soundness Of Al-Alloy Permanent Mold Castings, Dinesh Shantilal Patel
Masters Theses
"This thesis describes the step by step approach to the design of a gating system for the production of sound plate castings in permanent molds. Castings of different thicknesses were produced, utilizing various gating systems, and examined radiographically to evaluate the effectiveness of these gating systems in the production of sound castings. A gating system which allows metal to enter the mold cavity with no turbulence and which establishes proper temperature gradients in the casting will produce sound permanent mold castings"--Abstract, page ii.
Premartensitic Elasticity Of Fe-Ni Invars, Bryce Linn Shriver
Premartensitic Elasticity Of Fe-Ni Invars, Bryce Linn Shriver
Doctoral Dissertations
"The premartensitic temperature dependence of ultrasonic wave propagation in Fe-30 pct Ni polycrystals and Fe-32 pct Ni single crystals was measured by using a continuous wave technique. As the temperature was lowered to within 10°C of the Ms, a nonlinear decrease of the relative shear velocity was observed. This effect is related to dislocation stacking fault instabilities which may trigger the martensitic phase transformation. In addition, the single crystals show a frequency dependence of the shear elastic constant C' well above the Ms. The dispersion is believed to be caused by fluctuations in the anisotropic molecular …
Precipitation Of Carbon From Martensite In Ductile Iron, Devendra Ratilal Majmundar
Precipitation Of Carbon From Martensite In Ductile Iron, Devendra Ratilal Majmundar
Masters Theses
"Since metallographic studies of quenched and tempered cast iron have indicated that the carbon might precipitate directly as graphite rather than as carbides which are found in steels, this investigation used the Debye-Scherrer x-ray diffraction technique to examine electrolytically extracted residues from quenched and tempered ductile cast iron samples to determine if cementite was present. The precipitation of carbon in quenched samples of this ductile cast iron was found to be similar to the precipitation process in steels. Cementite was identified during the early stages of the tempering process when the tempering temperature was 800 degrees F, 900 degrees F, …
A New And Direct Process For The Reduction Of Lead Sulfide, Rolando Oscar Fernandez
A New And Direct Process For The Reduction Of Lead Sulfide, Rolando Oscar Fernandez
Masters Theses
"The direct reduction of lead sulfide concentrates by iron was investigated. An oxygen-bearing flux was shown to be a necessary ingredient for complete reduction of the concentrate. The effects of time and temperature on lead recovery were studied. Only a trace amount of sulfur dioxide is evolved during reduction, which is in agreement with thermochemical calculations"--Abstract, page ii.
Prebainitic Phenomena In Aisi 86b80 And 0.8c-5.3ni Steels, Chung Lim
Prebainitic Phenomena In Aisi 86b80 And 0.8c-5.3ni Steels, Chung Lim
Doctoral Dissertations
"An ultrasonic investigation shows that the prebainitic kinetics of AISI 86B80 and 0.8C-5.3Ni steels follow t2/3 and or t1 time laws in the lower bainite temperature region. The data analysis indicates that these kinetics signal carbon segregation to dislocations. The simple time laws are interrupted at the bainite start time. It is shown that at this time the carbon depleted regions around dislocations transform martensitically. The lower bainite reaction is thus initiated by the formation of supersaturated ferrite through carbon segregation and the subsequent local martensitic transformation"--Abstract, page iii.