Results 141 to 150 of about 2,034 (167)
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Hot workability of alpha brasses
1963Both lead and bismuth have a deleterious effect on the hot working properties of alpha brasses. The work reported in this article shows that the element uranium, when present in the alloy in such proportions as to form stable high melting point intermetallic compounds with all of the bismuth or lead, is a highly effective agent in removing the ...
R Thomson, J O Edwards
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Hot workability of aluminum particulate composites
2013Questo lavoro analizza sia le curve di flusso derivanti da prove di trazione a caldo [1-5] che la microstruttura [1,2,6-9] e le simulazioni del processo di estrusione (FEM) [10-13] di compositi in lega di alluminio. I risultati in analisi derivano principalmente da studi del Prof. H. McQueen.
LEO, PAOLA +1 more
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Hot workability testing of as-cast steels
Metals Technology, 1977AbstractA casting procedure has been developed which enables structures typical of those found in commercial ingots to be obtained in large-size tensile specimens which can be broken out of the moulds either hot or cold before reheating to simulate hot or cold charging practice.
R. A. Harding, R. Sawle, C. M. Sellars
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Hot Workability of High Strength 6060 Alloy
Materials Science Forum, 2000The alloy with 0.4% Mg and 0.5% Si was torsion tested in the range 0.1 to 10 s-1 and 300 to 500°C with exhibition of excellent ductility. The hot strength was shown to be low compared to other 6000 series alloys and to have little tendency to dynamic precipitation. The hyperbolic sine constitutive equation was optimized with a stress multiplier of 0.03
H.J. McQueen, Man Jong Lee
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Hot-worked microstructure and hot workability of cold-work tool steels
Materials Characterization, 2018Abstract The hot workability of two cold-work tool steels were evaluated and compared. A D2 and an advanced alloy based on 8% Cr steels (TDx) were deformed at high temperatures between 900 and 1100 °C with strain rates 0.001–10 s− 1 via hot compression test.
Jun-Yun Kang +5 more
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Evaluation of the Hot Workability of Commercially Pure Ti Using Hot Torsion Tests
Journal of Nanoscience and Nanotechnology, 2019Optimum processing conditions were obtained by evaluating the hot working behavior of commercially pure Ti using hot torsion tests. Hot torsion tests were conducted at temperatures ranging from 800 °C-1000 °C and strain rates ranging from 0.1-10 s-1. The flow curves show that the peak stress increases as the temperature decreases and the strain rate ...
Myoung-Hun, Kim +9 more
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Hot Workability of Alloy WE43 Examined Using Hot Torsion Testing
2011While rare earth additions can impart a variety of property improvements in magnesium alloys, they can also limit the processing parameter window inside which the alloys may be successfully wrought in commercial production routes such as extrusion and rolling.
F. John Polesak +3 more
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Hot Workability of Mechanically Alloyed In-738
1977The hot-workability of an oxide-dispersion-strengthened nickel base alloy IN-738 + Y2O3 was determined by high-strain-rate testing in the deformation range 10–4 to 102s-1 and at temperatures from 1050° to 1250°C. As-extruded IN-738 + Y2O3 shows high rupture ductilities at strain rates from 4∙10–2 to 4 s-1 and at temperatures from 1050°C to 1250°C.
Gernot H. Gessinger +2 more
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Hot workability of three grades of tool steel
Metallurgical Transactions A, 1984Three tool steels, a cold-work air-hardening grade, a hot-work die grade, and a high-speed type, were deformed by torsion in the range of 900 to 1100 °C at rates of 0.1 to 5 s•1. In a series of continuous deformation tests the flow stress and ductility were determined.
C. Imbert, N. D. Ryan, H. J. McQueen
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Hot workability and extrusion modelling of magnesium alloys
Zeitschrift für Metallkunde, 2005Abstract The hot working of commercial Mg alloys differs from creep in so far that twinning is much more prevalent in the early stages and dynamic recrystallization (DRX) becomes extensive above 400 °C. Subgrains form mainly near the grain boundaries and have similar dependence on stress; they were larger in hot working tests because of the much higher
H. J. McQueen, M. Sauerborn
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