Springer Science and Business Media LLC
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Work strengthening by a deformation-induced phase transformation in “MP alloys”
Springer Science and Business Media LLC - Tập 1 - Trang 423-430 - 1970
Work strengthening and microstructure were investigated for a class of alloys, designated “MP Alloys”, containing 20 pct Cr, 10 pct Mo, and the remainder cobalt and nickel in proportions ranging from 60Co∶10Ni to 30Co∶40Ni. These alloys, in the fully annealed, homogenized condition, have a fcc structure with yield strengths ranging from about 45 to 60 ksi. Deformation at room temperature rapidly i...... hiện toàn bộ
The classification of binary eutectics
Springer Science and Business Media LLC - Tập 2 - Trang 1793-1798 - 1971
Values of the interface roughness parameter (α) have been calculated for the primary phases of the 12 simple binary eutectic systems for which sufficient thermodynamic data are available; namely, Ag−Bi, Ag−Cu, Ag−Pb, Al−Ge, Al−Sn, Bi−Cd, Bi−Sn, Cd−Pb, Cd−Zn, In−Zn, Pb−Sb and Sn−Zn. It is shown that in the presence of solute the values of α can be significantly different from those of the pure comp...... hiện toàn bộ
Defocusing correction for the measurement of preferred orientation
Springer Science and Business Media LLC - Tập 2 - Trang 2925-2929 - 1971
A method utilizing textural symmetry is described for establishing the defocusing correction in the Schulz reflection technique of pole figure analysis. An offset specimen is necessary for this determination and sample material identical to that under study is used. This avoids certain difficulties associated with the conventional textureless specimen procedure. The new method is compared with the...... hiện toàn bộ
Copper diffusion in iron during high-temperature tensile creep
Springer Science and Business Media LLC - - 1971
The diffusion of liquid copper in iron from a notched surface has been studied by metallographic, microanalysis, and sessile drop techniques. The diffusivity of copper was found to be 0.59×10−6 sq cm per sec at 1100°C and 0.97×10−6 sq cm per sec at 1130°C. The diffusion factor,D
0 was 0.78×10−3 sq cm per sec and the activation energy 19.0 kcal per mole. The predominant mode of copp...... hiện toàn bộ
Hydrogen diffusivities in molten iron between 0.1 and 1.5 atm H2
Springer Science and Business Media LLC - Tập 2 Số 11 - Trang 3241-3242 - 1971
The nucleation of aluminum grains in alloys of aluminum with titanium and boron
Springer Science and Business Media LLC - Tập 1 - Trang 275-280 - 1970
The microstructure of a ternary alloy, Al-5 wt pct Ti, 1 wt pct B, has been examined by optical and electron transmission microscopy, by selected area diffraction, and electron probe microscopy, by selected area diffraction, and electron probe microanalysis. Particles of Al3Ti are found at the center of grains and there exist preferred epitaxial orientations between this compound and the surroundi...... hiện toàn bộ
Fine structure in quenched Fe-Al-C steels
Springer Science and Business Media LLC - Tập 3 - Trang 2163-2169 - 1972
The origin of “extra” spots in electron diffraction patterns taken from retained austenite and martensite in Fe-7 pct Al-2 pct C has been investigated. The present interpretation differs from that of previous investigators. It is concluded that a high density of fine carbide precipitates 50Å in diameter is responsible for the extra reflections. The precipitates have the perovskite structure and gr...... hiện toàn bộ
The role of natural convection in ladles as affecting tundish temperature control in continuous casting
Springer Science and Business Media LLC - - 1971
An approximate analysis is presented to describe the flow field in molten steel held in a ladle, as caused by natural convection. It is shown that a thick (say 8 to 14 in.) slag layer is required to suppress extensive vertical mixing within the ladle. It is also shown that natural convection caused by the contact of the metal with the cold ladle walls may produce mass flow rates of the order of 2 ...... hiện toàn bộ
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