The solution rate of alumina in CaF2-Al2 O3 slagsSpringer Science and Business Media LLC - Tập 1 - Trang 2253-2256 - 1970
A. Mitchell, B. Burel
The rate of solution of A12O3 in CaF2 + 30 wt pct A12O3 (at 1518° and 1509°C) and CaF2 + 20 wt pct A12O3 (at 1500°C) liquids has been determined. The operative process is diffusion-controlled, with an interdiffusion coefficient,D for the process varying between 8.5 and 8.1 x 10-5 sq cms
- 1 in the CaF2 + 30 wt pct A12O3 slags, and 4.0 × 10-5 sq cms
- 1 in the CaF2 +...... hiện toàn bộ
Optimization of the range of elastic behavior of unidirectional composites by prestrainingSpringer Science and Business Media LLC - Tập 3 - Trang 2507-2513 - 1972
R. W. Heckel, R. J. Zaehring, H. P. Cheskis
The effect of tensile prestrain on the stage I tensile yield stress has been studied both analytically and experimentally for composites whose stress-strain curves obey the rule of mixtures. The mathematical analysis provides a means for calculating the optimum amount of prestrain, the residual stresses (in the direction of the fibers) in the matrix and fiber materials after unloading from the pre...... hiện toàn bộ
The role of dislocations in the flow stress grain size relationshipsSpringer Science and Business Media LLC - Tập 1 - Trang 1145-1159 - 1970
J. C. M. Li, Y. T. Chou
Calculations involving pile ups of dislocations, both analytical and numerical, using either discrete dislocations or continuous distribution of dislocations of infinitesimal Burgers vectors, are reviewed in the light of their effects on the relation between yield or flow stress and grain size. The limitations of the pileup models are discussed and some nonpileup theories of yielding are criticall...... hiện toàn bộ
Plane strain compression of copper, Cu 6wt Pct Al, and Ag 4wt pct Sn crystalsSpringer Science and Business Media LLC - Tập 1 - Trang 2715-2722 - 1970
B. C. Wonsiewicz, G. Y. Chin
Crystals of various orientations were forced to undergo plane-strain compression to simulate the deformation of a grain in a polycrystalline aggregate. Copper, Cu−6wt pct Al, and Ag−4wt pct Sn were studied to evaluate the influence of stacking fault energy on the model of G. I. Taylor which assumes equal hardening on all slip systems. The compression stress strain (σ−∈) curves were converted to re...... hiện toàn bộ