Materials Literature
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A study was made of the effect of grain size and heat treatment upon the impact-toughness of SAE 1050 steel, as judged by the temperature range wherein cold-brittleness occurred. There was no relation between grain size and impacttoughness in the hot-rolled steels. Normalizing improved this property, and in this condi…
Differential heating curves were used to study the behavior of calcium sulfate at high temperatures. After cooling, the material was examined by means of the petrographic microscope and by study of its X-ray pattern. It was found that the beta-to-alpha transition of calcium sulfate occurs at approximately 1,214 C, and…
A bstract The present picture of the atomic arrangement in glass has developed from four kinds of information, namely, the laws of crystal chemistry, the X‐ray diffraction study of glass, the various measured physical properties of glass, and the kinds of materials and the ranges of composition in which glassforming p…
The alloys of copper and iron which have been studied show unusual magnetic properties both in the saturation effects at low temperatures and in the apparent change in the magnetic moment of the dissolved iron atoms over the range of temperatures from 14\ifmmode^\circ\else\textdegree\fi{}K to 1300\ifmmode^\circ\else\t…
Wool is remarkable among textile materials in that it possesses high extensibility and the ability to return to its original length or shape after being stretched or distorted. These properties are of advantage in such products as clothing, blankets, and carpets. It is shown that a number of the important physical pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrosion of 18–8 Stainless Steel in Sodium Chloride SolutionsH. H. Uhlig and M. C. MorrillCite this: Ind. Eng. Chem. 1941, 33, 7, 875–880Publication Date (Print):July 1, 1941Publication History Published online1 May 2002Published inissue 1 July 1941https://pubs.acs.org/doi/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE HIGH-TEMPERATURE CHLORINATION OF SATURATED ALIPHATIC MONOCHLORIDES. A "VICINAL" EFFECT1FREDERICK F. RUST and WILLIAM E. VAUGHANCite this: J. Org. Chem. 1941, 06, 4, 479–488Publication Date (Print):July 1, 1941Publication History Published online1 May 2002Published inissu…
Reusch and Sohncke have examined the properties of a system containing a large number n of identical retardation plates, each of which is rotated with respect to the one preceding it through the angle ω. The product of n and ω must be equal to μπ, where μ is an integer. Under certain conditions this system is opticall…
Abstract Beim Zusammenkochen von Lösungen von Magnesiumchlorid und Kieselsäurehydrat mit Kaliumhydroxyd und Calciumhydroxyd wurden Magnesiumsilikatgele erhalten, die im Unterschied zu analog gefällten Aluminiumsilikaten deutliche Interferenzen gaben, und zwar alle für die Silikatschichten der Tonmineralien charakteris…
Abstract Titan kann Sauerstoff in fester Phase lösen; dabei ändern sich die Gitterkonstanten und damit das Molvolumen nur wenig. Während die c‐Achse bis zur Phasengrenze bei der Zusammensetzung TiO 0,42 regelmäßig um 1,8% anwächst, kommt die Änderung der a‐Achse.
The photoelectric current emitted under the influence of an applied electric field is found to contain a term analogous to the Schottky term for thermionic emission and also a term periodic in the field intensity similar to that recently found and explained for thermionic emission. If frequencies near the threshold ar…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTAnalysis of Cellulose Derivatives:Determination of Total Combined Acyl in Cellulose Organic EstersLeo Genung and Russell MallattCite this: Ind. Eng. Chem. Anal. Ed. 1941, 13, 6, 369–374Publication Date (Print):June 1, 1941Publication History Published online1 May 2002Published i…
Abstract The authors discuss the results of an investigation on the resistance to plastic forming of several metals over a wide range of rates of deformation at various temperatures. To carry out the tests, two machines were built: One, a high-speed testing machine, was described in Part I of this report; the other, a…
With a given specification of the space-charge density and velocity functions for a general electron-tube system, the balance of instantaneous rates of energy change between the space and the external circuits has been derived here from Green's theorem. It is shown that the external currents can be completely accounte…
The effect of order and disorder upon the breakdown characteristics of ionic materials has been investigated. While the dielectric strength of the alkali-halide crystals increases steeply with temperature in the lower temperature range, the trend in glasses is found to be the opposite. A comparison of the characterist…
Abstract The effective susceptibility (that is, the magnetic moment divided by the external magnetic field) of a paramagnetic powder loosely packed into an ellipsoidal container has been measured against the vapour pressure of liquid helium, and hence, using the results of the preceding paper, against the susceptibili…
When a sinusoidal voltage is applied to a condenser containing an absorptive dielectric the absorption current can be split up into two components, one in phase and another in quadrature with the voltage. In the present paper, direct relations, suitable for numerical calculation, are established between these componen…
To learn more about the identification of crystalline materials, preferred orientations, particle sizes, strains, and structure randomness, x-ray diffraction is used. Here both basic principles and working techniques are described.
Random layer lattice structures are considered which consist of layers arranged parallel and equidistant, but random in translation parallel to the layer, and rotation about the normal. We call $a$ and $b$ the axes in the layer, and $c$ the axis normal to the layer. In this notation there will be crystalline reflectio…
The long wave-length, polar lattice vibrations of alkali halide crystals are discussed without making any specific assumptions about the detailed interactions between the ions. This is made possible by the introduction of the effective charge, ${e}^{*}$, of an ion defined as follows: All of the positive ions in a crys…