Materials Literature
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Two kinds of work-hardening are discussed, interaction-hardening and source-hardening. Interaction-hardening arises because a large stress must be applied to move a dislocation through a material which already contains a large number of dislocations. This paper is mainly concerned with source-hardening which occurs be…
A survey is given of the absorption of radiation in the energy range from 0.1 Mev to 6 Mev. Results of the theories of Compton effect, photoelectric effect, and pair production are given in the form of equations, tables, and curves. Necessary considerations in studying absorption coefficients are discussed and results…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBreakage of Carbon-Rubber Networks by Applied StressA. F. Blanchard and D. ParkinsonCite this: Ind. Eng. Chem. 1952, 44, 4, 799–812Publication Date (Print):April 1, 1952Publication History Published online1 May 2002Published inissue 1 April 1952https://pubs.acs.org/doi/10.10…
Summary Experiments on the formation of twins in single crystal wires of cadmium under tension demonstrate the essentially discontinuous nature of the process of twin growth, and produce evidence in favour of a critical resolved shear stress law for twinning. Twinning can contribute to creep at room temperature but no…
Slater's theory of the dielectric constant in BaTi${\mathrm{O}}_{3}$ has been extended by treating the ionic polarizability quantum mechanically instead of classically. This leads to an expression for the dielectric constant which is good at all temperatures and shows a deviation from the Curie-Weiss law at low temper…
Abstract The catalytic reaction has been studied on a granular surface of the metal coated with cuprous oxide. The nature of the adsorbed species in the stationary state of the reaction has been investigated by measurements of heats of adsorption and by B. E. T. measurements. The adsorption characteristics of cuprous…
Abstract Lithium aluminium hydride on heating decomposes in three stages: (a) an initial surface reaction during the induction period, followed by (b) an interface reaction giving an S-shaped pressure against time curve, corresponding to LiAlH4 → LiAlH2 + H2, and (c) a slow process during which a third hydrogen atom i…
The viscosity of gelatin solutions at concentrations between 100 and 500 g./l. has been studied as a function of pH, ionic strength, and temperature. In these concentrated systems the predominant factor determining the viscosity appeared to be Coulombic forces between ionized groups on adjacent chains.
Single crystals of the tetragonal fl-phase of uranium were grown in material containing small amounts of chromium by a 7 --> fl phase-transformation method. These crystals could be retained in a metastable condition for long periods following their quenching from normal fl-phase temperatures into water at room tempera…
Graphs have been developed to simplify the study of fabric geometry. A simultaneous plot of the mathematical relations developed by Peirce aids in visualizing dimensional changes in fabrics and gives accurate values of the various parameters without lengthy calculations and interpolations from tables. The use of the g…
The theory of KH2PO4 developed by Yomosa and the present writer can be applied to the upper phase of NH4H2PO4 without any alteration. All the experimental data can be represented by the formulas of this theory. It is shown that this theory has a more general character than it appears as based upon Slater's model of KH…
The investigation is divided into two parts: the first is concerned primarily with stability relations among the various crystalline phases of $$MgSiO_{3}$$. Contrary to results given in previous published investigations, experimental evidence favors the stability of rhombic enstatite and protoenstatite. Clinoenstatit…