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Volume 8 (1958)
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Volume 8, Issue 1
Displaying 1-18 of 18 articles from this issue
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Hideo NISHIMURA1958 Volume 8 Issue 1 Pages 3-4
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
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Effects on electric conductivity and tensile strength of various combined metals in aluminium metalsKengo IKEDA, Tosio ISOBE, Akira HANADA1958 Volume 8 Issue 1 Pages 5-18
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSAluminium metal now in use for electric conductor contains Si and Fe and small amount of Ca, Mn, Ti, V, Cu, Mg, etc., and it is considered that, as reported previously, this kind of metal now shows under the present cable manufacturing conditions its possibly highest valued both in conductivity and tensile strength. Therefore, it is presumed that some modifying elements have to be added to obtain still better metal for conductor.
Thus, the reporters made a study on the effects of particularly added Th, Cr, B, Ni, Zr, Zn as well as Si, Fe, Cu, Ti, V, Ca, Mg, Mn contained in ordinary aluminium metal on the ability of conductor, by means of Random Coupling of two Orthogonal Design.
Findings are as follows:
1. Si, Fe, Cu, Cr, Mn, Mg, Ti and V lower the conductivity and B functions so as to decrease the lowering of conductivity at least by Ti and V.
2. Th, B, V and Zn lower the tensile strength, and Si, Fe, Cu, Mg, Zr, Ca and Ni higher it. It was concluded that in such a small amount as used in this experiment Ni, Ca and Zr higher the tensile strength, without affecting the electric conductivity.View full abstractDownload PDF (1708K) -
1958 Volume 8 Issue 1 Pages 18
Published: 1958
Released on J-STAGE: September 04, 2009
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On the deve copement of the consumable electrode arc melting furnaceHidetake KUSAMICHI1958 Volume 8 Issue 1 Pages 19-32
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSThe non-consumable electrode arc melting furnace which has tungsten or graphite tip as an electrode was not suitable for purity and homogenity of molten ingot, and consumable electrde are melting furnace has been developed since 1953 because of its electrode being made of the same material as molten metal.
There are many summarised, introductory articles on the mechanical properties, but no report on the experiment of consumable electrode arc melting furnace and the comparison with non-consumable electrode furnace.
The outhor has studied the industrialization of titanium fabrication for many years and has acquired the experimental principles that justify the above-mentioned development through many experiments.
The last part of this article deals with these principles. In 1955, the author discovered that refining be possible melting practice if melting conditions would be desireable, and the author applied this principle to melting methods of various steels and heat-resistant alloys and researched the cause of ruch phenomena.
As a result, it is revealed that consumable electrode melting method is suitable not only for titanium and zirconium but for special steels as well as heat-resistant alloy.View full abstractDownload PDF (7253K) -
1958 Volume 8 Issue 1 Pages 32
Published: 1958
Released on J-STAGE: September 04, 2009
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Yoshikazu HOSOI, Mamoru YUKAWA, Eiichi SAWATO1958 Volume 8 Issue 1 Pages 33-38
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSWe discussed from the X-ray analysis and the microscopic investigation improving the polishing and etching, why the preheating of an as-cast billet for the extrusion gave to the extruded rod such an effect as if it was extruded at higherextrusion temperature.
On the structural changes by the annealing, the extruded rod was compared with the streched one after the extrusion.View full abstractDownload PDF (3265K) -
1958 Volume 8 Issue 1 Pages 38
Published: 1958
Released on J-STAGE: September 04, 2009
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Yoshikazu HOSOI, Mamoru YUKAWA1958 Volume 8 Issue 1 Pages 39-42
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSThis report concerns with the comparison of the extrusion pressure and the tendency of anneal-softening, on different purities of aluminium.
The extrusion pressure, hardness, microscopic structure and fiber structures were investigated on aluminium alloys containing manganese, chromium or zink, and also their conditions of anneal-softening were discussed.View full abstractDownload PDF (1482K) -
(4th Report) On the connection between the directionality and the damping capacityTakuichi MORINAGA, Shigeo ZAIMA, Tsuneo TAKAHASHI, Kunio SHIMIZU1958 Volume 8 Issue 1 Pages 43-47
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSWe newly detect the directionality in the cold rolling Al-Cu alloys by means of the damping capacities in the cantilever type transverse oscillation. The damping capacities show some dispersion, but are highest in 45°-direction and lower in turn in 90°- and 0°-direction, but there is little difference between the latter two. We have utilized, as the sensible analysing method, the analysis of the properties and the characteristics of metals from the standpoint of the internal friction by measuring the damping capacity of the materials.
And we confirm these results by compairing them with the directionality in X-ray analysis. And as the connection of these relations between this detection and other methods was not searched in the same specimen, we now persue it in this research.View full abstractDownload PDF (1235K) -
Takuichi MORINAGA, Shigeo ZAIMA1958 Volume 8 Issue 1 Pages 48-50
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSIn practics, the sheet is usually produced by one way rolling, because it is easier than any other method in the productive works. When we use a sheet, the question is whether it has a directionality or not. An experiment was performed recently, with aluminium sheets to eliminate the influence of the directionality by adding certain elements. The detection of directionality is usually achieved by various methods, and we have suggested several new methods of detecting the directionality for industrial use, and could detected the directionality by means of the damping capacity (the logarithmic decrement) in cantilever type transverse oscillation when it was necessary to know exactly the direction affected by hard working so much that there is no way except the X-ray analysis, for example, the rolled material in cross pass.
We examine newly the directionality by measuring the damping capacity of the cladded sheets of 2S manufactured by a certain factory for the purpose of eliminating the influence of directionality. In the case of a cladded sheet, as there is a difficulty in preparing test pieces. for X-ray analysis, we think that this method is very useful when it is necessary to exactly detect the directionality. The result seems to show that there is slight directionality in the sheets. Further, we mention the connection between this method and other methods by tension and other tests.View full abstractDownload PDF (714K) -
Takashi IKENO, Kizo SHIBATA1958 Volume 8 Issue 1 Pages 51-54
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSThe effect of Cr, Fe, Si, Mn or Zr on the some properties of 52S alloy sheets was investigated. The results obtained may be summarized as follows;
1) The resistance of stress corrosion of the specimens, contained less than 0.2%Cr, was inferior and resistance of corrosion (un-stress) of the specimens, contained above 0.3%Cr, was also similar.
2) The resistance of corrosion decreased gradually with increasing of the content of Fe or Si.
3) The specimens, contained 0.6%Fe, have higher value of tensile strength and hardness, but that, contained 0.6%Si, have lower one.
4) By addition of small amount of Mn or Zr, the tensile strength and hardness increased. 5) At the specimens, contained 0.9%Mn or 0.5%Zr, the tensile strength and hardness scarecely decreased by heating.
6) The casting structure of 52S alloy become very fine by addition of 0.5%Zr.View full abstractDownload PDF (532K) -
Report I Mechanical properties of SheetRihei KAWAUCHI1958 Volume 8 Issue 1 Pages 55-77
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSStudies of the mechanical properties of Al 3-5%-Mg alloy sheets in connection with Mn and Cr contents as well as manufacturing conditions were done in detail, especially in view of a fact that, because of the superior corrosion-resistivity and powerful mechanical properties after welding, these alloy series have been attracting wide attention recently.
Experimental results make it clear that Mn and Cr act very effectively. The mechanical properties of the alloys are apt to be influenced by the manufacturing conditions, especially when Mn or Cr content is increased.View full abstractDownload PDF (2613K) -
1958 Volume 8 Issue 1 Pages 77
Published: 1958
Released on J-STAGE: September 04, 2009
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Rihei KAWACHI1958 Volume 8 Issue 1 Pages 78-87
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSSamples of sheet from of 24S with or without Mn. and of 61S with or without Cr. were heat-treated by various methods, and their hardness and micro-structures were examined to clarify the effect of these elements on the softening characteristics due to precipitation of so-called “Hardening-Constituents” from solid solution.
Present study shows in detail that, Mn. and Cr. accelerate the presipitation-progress and the softening rate, but such phenomena are influenced greatly by the existence of the water-quenching before annealing.View full abstractDownload PDF (2131K) -
1958 Volume 8 Issue 1 Pages 87
Published: 1958
Released on J-STAGE: September 04, 2009
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Genjiro MIMA, Riyozo INOUE, Mitsugu TOKIZAWA1958 Volume 8 Issue 1 Pages 88-92
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSThe internal friction introduced by the static compression was compared with that introduced by the impact compression in the commercially pure aluminium. Generally speaking, the internal friction was decreased to a constant value with the standing time at room temperature.
For the initial range of the standing time at room temperature, the internal friction introduced by the impact compression was greater than that introduced by the static compression, but in the later half of the standing time the former was decreased swiftly rather than the latter.
The variation with cold-working level of the internal friction introduced by cold-compressin was given by the difference between the observations on the static compressed specimens and on the impact compressed specimens.
The internal friction introduced by compression was first increased with the cold-compression level, up to some small levels, any 15% reduction of area, in agreement with the expected behavior.
In the measurements for the 15% reduced specimen after standing at room temperature for around 100 minutes, the internal friction introduced by impact compression was greater than that by the static compression as much as a few times.
There results were phenomenologically explaind.View full abstractDownload PDF (1144K) -
Goro ITO1958 Volume 8 Issue 1 Pages 93-106
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSPolarization of aluminium and its alloys in various electrolyte was studied. The characteristics of polarization in aluminium and its alloys in chloride bearing solution are such that its cathodic polarization is predominant over anodic polarization (this is the case of so called. “cathodic control”), and that the potential change caused by cathodic current at low current density is slight, whereas the sudden change or break of potential will occur when current reaches a certain critical value. This is also true with most of the other metals in chloride solution. But in sulfate or nitrate solutions, a nodic polarization of aluminium is of the same order as cathodic polarization, and hence no potential break occurs.
These features of polarization in chloride solution show that the cathodic reaction is the rate determing step, and that the factor which promotes it, such as depolarization of cathode, increases the corrosion and consequently increases the corrosion of anode.
When the two dissimilar metals come in contact with each other in electrolyte solution, the corrosion current caused does not depent upon the open circuit potential difference between the two metals, but on the polarization characteristics of the couple. In the case of aluminium-copper couple in solution chloride solution, for example, copper (cathode) polarizes in a marked degree than aluminium (anode), and therefore cathode controls overall corrosion reaction.
In general, the corrosion current caused by the metallic couple of aluminium and other metals in chloride solution is nearly proportional to the area of cathode of the couple and is much less dependent on the anode area.
Contact corrosion of aluminium with other metals can be protected by cathodic polarization of the couple by external e. m. f., and the potential break in cathodic polarization curve for these couples can be used as criterion of protection.
And this is also true in the cathodic protection of various metals in corrosion electrolyte, provided that the cathodic reaction is the rate determing step.
The corrosion of aluminium alloy caused by the local current between its structural components can also be explained by the polarization characteristics of these contact corrosion.View full abstractDownload PDF (1749K) -
On the corrosion of some aluminium alloys in brandyTakuichi MORINAGA, Shigeo ZAIMA, Motoo KAGAMI1958 Volume 8 Issue 1 Pages 107-109
Published: January 31, 1958
Released on J-STAGE: September 04, 2009
JOURNAL FREE ACCESSThe studdies on the utilization of aluminium and its alloys in brewing have been made in full, and these alloys have been used largely as the vessel, the pipe and so on in brewing industry, and its utilization has been effective in rationalizing the process of production. But the study on the corrosion of the aluminium and its alloys in wine and brandy has not been touched, the wooden vessel or parts being used mainly.
In this paper, we search the behavior of these alloys in the brandy for the purpose of confirming its utilization in brandy industry. The specimens used are the anti-corrosion aluminium alloys, that is, 1S, 2S, 3S and 52S.
These alloys are known to be attacked by the brandy, and among them 3S shows good resistance to corrosion and 2S most poor resistance, and the brandy affected by these alloys decrease the charactor (i. e. the flavor and the test) and increase the pH-value, that seems to have some connection with the charactor in brandy, in spite that the total acid is not changed.View full abstractDownload PDF (427K)
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