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1. |
X‐Ray Study of the Plastic Working of Magnesium Alloys |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 161-168
L. G. Morell,
J. D. Hanawalt,
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摘要:
The inner structure of Dowmetal fabricated by various processes, such as forging, rolling, extruding and drawing, has been studied by means of x‐ray diffraction. The x‐ray diffraction patterns are identified by comparing them with computed fiber patterns for the close‐packed hexagonal system,c/a=1.62. Three distinct structures are obtained—a [210] fiber structure at ordinary temperatures and a [110] fiber structure at temperatures higher than about 450°C with the fiber axis, in both cases, in the direction of extrusion or drawing, and a [001] fiber structure with the fiber axis in the direction of forging. The difference in the structure of metal extruded at low and high temperatures is discussed in terms of the glide systems of magnesium.
ISSN:0021-8979
DOI:10.1063/1.1745095
出版商:AIP
年代:1932
数据来源: AIP
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2. |
The Crystal Structure of Electrodeposits from Copper Acetate Solutions |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 169-171
S. J. M. Allen,
H. Kersten,
Joseph Maas,
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摘要:
It is shown by x‐ray diffraction methods that electrodeposits from copper acetate solutions consist principally of a mixture of crystals of copper and cuprous oxide and that the proportion of cuprous oxide deposited with the copper increases when the bath is made less acid. Rectification or photoelectric properties such as are exhibited by cuprous oxide prepared on the surface of copper were not observed for the electrodeposits.
ISSN:0021-8979
DOI:10.1063/1.1745096
出版商:AIP
年代:1932
数据来源: AIP
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3. |
Characteristics of Certain Caesium‐Oxide Photoelectric Cells |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 172-178
J. C. Peters,
E. B. Woodford,
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ISSN:0021-8979
DOI:10.1063/1.1745097
出版商:AIP
年代:1932
数据来源: AIP
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4. |
Temperature Distribution in Solid Bodies During Heating or Cooling. A Correction |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 179-184
J. B. Austin,
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PDF (200KB)
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ISSN:0021-8979
DOI:10.1063/1.1745098
出版商:AIP
年代:1932
数据来源: AIP
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5. |
Chemical Treatment of Rotary Drilling Fluids. Release of Cuttings: Chemicalvs.Mechanical Methods |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 185-192
H. C. Lawton,
H. A. Ambrose,
A. G. Loomis,
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摘要:
The general problem of elimination of sand, cuttings, and gas from aqueous dispersions of clay, commonly used in the rotary method of drilling oil wells, with reclamation of the colloidal content of the drilling fluid, is considered. Various mechanical devices for this purpose are briefly described and available data compared with laboratory findings on the rates of settling of particles from clay drilling fluids after chemical treatment. The colloid physics underlying the efficiency of chemical treatment is discussed. Graphs are given showing the superiority of chemical treatment of drilling fluids as compared with mechanical methods for reclaiming spent fluids. Treatment by chemical reagents has the great advantage of requiring no new equipment or expensive installation, and individual wells may be treated economically. Certain recommendations are made for maximum efficiency of the chemical method for field practice.
ISSN:0021-8979
DOI:10.1063/1.1745099
出版商:AIP
年代:1932
数据来源: AIP
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6. |
An Inverter‐Lamp for the Conversion of 60‐Cycle Power into 1000‐Cycle Modulated Light |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 193-202
W. F. Westendorp,
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摘要:
A gaseous discharge lamp in combination with a special electrical circuit is described with which a high‐efficiency conversion of 60‐cycle a.c. power into 1000‐cycle pulsating light is obtained. The efficiency of this device is 17 lumens per watt as compared to 6 lumens per watt for an incandescent lamp with a mechanical shutter. As the modulated light is designed for the use in beacons and for the detection by means of a photoelectric tube and tuned amplifier, the component of fundamental frequency is the only important one. In a mathematical analysis of different wave shapes, the fundamental component is calculated as a function of the average light output; also the efficiency of a modulated neon discharge.
ISSN:0021-8979
DOI:10.1063/1.1745100
出版商:AIP
年代:1932
数据来源: AIP
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7. |
THE EDITOR'S COLUMN |
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Journal of Applied Physics,
Volume 3,
Issue 4,
1932,
Page 203-207
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PDF (263KB)
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ISSN:0021-8979
DOI:10.1063/1.1745101
出版商:AIP
年代:1932
数据来源: AIP
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