Report on a Preliminary Investigation of the Properties of the Copper-tin AlloysU.S. Government Printing Office, 1879 - 474 Seiten |
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Report on a Preliminary Investigation of the Properties of the Copper-Tin ... Robert Henry Thurston Keine Leseprobe verfügbar - 2018 |
Report on a Preliminary Investigation of the Properties of the Copper-Tin ... Robert Henry Thurston Keine Leseprobe verfügbar - 2016 |
Häufige Begriffe und Wortgruppen
A.-Material Alloy.-Original mixture alloys containing alloys of copper annealing antimony appearance Autographic Strain Diagrams beam bismuth blowholes Breadth Breaking load brittle bronze cast copper cent coefficient of elasticity color composition COPPER AND TIN crystals curve decrease of resistance deflection density DEPARTMENT OF ENGINEERING Diameter of fractured Dingler's Journal ductility elastic limit Elongation Elongation experiments Fac-Simile Autographic Strain foot-pounds heat inal length increase INSTITUTE OF TECHNOLOGY iron Length between supports limit of elasticity liquation Load per Elongation Load per square luster MECHANICAL LABORATORY minutes Modulus of elasticity Modulus of rupture mold nearly observed orig Original mark Original Mixture PLATE portion pounds per square pressure RECORD OF TESTS resilience Second series showed Sn.-Analysis Sn.-Dimensions specific gravity specimen STEVENS INSTITUTE surface TABLE temperature Tenacity per square tensile strength tensile stress TENSILE STRESS-Continued TESTS BY TENSILE TESTS BY TRANSVERSE tin).-Color tion transverse stress transverse tests weight zinc
Beliebte Passagen
Seite 395 - Mallet's experiments on a series of 16 alloys, the figure 1 representing the maximum and 16 the minimum of the property. The ductility of the brittle metals is represented by Mallet as 0. The relative ductility given in the table of the alloys experimented on by the US Board is the proportionate extension of the exterior fibres of the pieces tested by torsion as determined by the autograph strain diagrams.
Seite 395 - broke" in this column indicates the fact that the alloy opposite, which it occurs broke under the indenting tool, showing that the relative hardness could not be measured, but was considerably greater than that of cast iron.
Seite 505 - Matthiessen t has shown that small traces of the metals, and especially of the metalloids, reduce the conductivity of copper to a great extent. He states, also, that there is no alloy of copper which conducts electricity better than pure copper...
Seite 395 - The figures of specific gravity show a fair agreement among the several authorities in the alloys containing more than 35 per cent, of tin, except those given by Mallet, which are in general very much lower than those by all the other authorities. In the alloys containing less than 35 per cent, of tin there is a wide variation among all the different authorities, Mallet's figures, however, being generally lower than the others.
Seite 501 - ... abstracted, as to the inequality affecting its removal from the different parts of the melted mass in the act of consolidation. Thus, if a crucible full of the melted alloy were lifted out of the furnace and placed on the floor to cool, the surface of the melted metal within it being well covered with a thick layer of hot ashes, the lower parts of the mass after it had become solid would be found to contain less silver in proportion than the upper surface. If, on the other hand, the crucible...
Seite 497 - Ure* gives the rule as follows: Multiply the sum of the weights into the products of the two specific gravity numbers for a numerator, and multiply each specific gravity number into the weight of the other body and add the products for a denominator. The quotient obtained by dividing the said numerator by the denominator is the truly computed mean specific gravity of the alloy. Expressed in algebraic language the...
Seite 506 - Trans., 1860, pp. 85-92. volumes, but always in a lower degree than the mean of their volumes. To Class A belong lead, tin, zinc, and cadmium. To class B belong bismuth, mercury, antimony, platinum, palladium, iron, aluminium, gold, copper, silver, and in all probability most of the other metals.
Seite 370 - They were then rapidly transferred to the beaker of distilled water, in. which they were weighed, being suspended by a loop of very fine platinum wire, from the arm of the balance. The water in which they were weighed was always kept at the same level, and the proper correction was made for the weight of the platinum wire. The results given in the table are corrected for the temperature of the water, being reduced to the standard of water of maximum densitv (3'J°.1 Fahr.).
Seite 497 - ... differ in regard to others. These differences may be accounted for by the differences in the apparatus used by the experimenters, by the fact that some determinations have been corrected for temperature and pressure of the atmosphere while others were not, but principally from the. fact that several of the alloys are liable to be very deficient in homogeneity, and that the density of the same alloy will vary according to the conditions under which it is formed, as being cast too cold or too hot,...
Seite 507 - Some of the results they obtained were entirely unexpected. Nitric acid of 1.14 specific gravity was found to dissolve the two metals in an alloy of zinc and copper in the exact proportion in which they exist in the alloy employed, while an acid of 1.08 specific gravity dissolved nearly the whole of the zinc and only a small quantity of the copper.