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Volume 12 (1962)
- Issue 6 Pages 349-
- Issue 5 Pages 283-
- Issue 4 Pages 221-
- Issue 3 Pages 143-
- Issue 2 Pages 69-
- Issue 1 Pages 1-
Volume 12, Issue 4
Displaying 1-7 of 7 articles from this issue
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Takuo IKKATAI1962 Volume 12 Issue 4 Pages 221-222
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (429K) -
Shoichi TAKAYAMA1962 Volume 12 Issue 4 Pages 223-224
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (402K) -
Saburo ISHIKAWA, Shigeyasu KODA1962 Volume 12 Issue 4 Pages 225-235
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe age-hardening phenomena of Al-0-4.01%Cu-0-4.22%Mg alloys, when they were aged for 15 days at 0°, 15° and 30°C after solution-treated for 17 hours at 500°C, has been investigated measuring the Vickers hardness.
(1) The maximum hardness is obtained in the Al-4%Cu-0.63-2.14%Mg alloy aged at 30°C.
(2) The degree of hardening decreases with decreasing of the copper content. No natural age-hardening is observed in the Al-Mg binary alloy.
(3) The increase in the amount of Mg results in the retard of age-hardening of Al-Cu-Mg alloy containing the same copper content the activation energy of age-hardening of the alloy increases with increasing of amount of Mg.View full abstractDownload PDF (738K) -
Takashi IKENO, Yasumasa YOKOYAMA1962 Volume 12 Issue 4 Pages 236-242
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSWe can produce a milk-white, transparent and very excellent corrosion-resistant film by putting an aluminium sheet in the steam of 4kg/cm2 for 30-60 minutes after boiling in a 0.2-0.4% NH4OH aqueous solution (with soft or distilled water) for several minutes.
This report is concerned with the experimental procedure and the research of production conditions of this film in the industrial scale, i. e. in this report, it is clarified that both of the films obtained in the laboratory and factory are equally of high corrosion-resistivity.View full abstractDownload PDF (1236K) -
Kichizo KOIKE, Hiroshi ASADA1962 Volume 12 Issue 4 Pages 243-248
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe fluidity of metal in the cavity of permanent mould is influenced by the thickness of the mold coating. But, when the coating condition of the coating is kept canstant, the fluidity is to be influenced only by the casting temperature; because the temperature of the mold becomes saturate if the casting is made at regular intervals.
This is to report on the study of the relation between casting temperature and saturated mold temperature, and that between the mold temperature and the fluidity of liquid alloy in the cavity
The findings are as follows:
(1) The relaton between casting temperature and the saturated mold temperature is linear.
(2) The best condition for castlng is available at the mold temperature of above 370°C and at this point,
adequate casting temperature is 735°±20°C.View full abstractDownload PDF (412K) -
Shigeki NAITOH1962 Volume 12 Issue 4 Pages 249-254
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn Japan there have been workedout a few plans of aluminium-made crane.
When I checked some reports on its design process already published or not yet public, I who have been making researches in the airplane design field, found some incomprehensible points.
Now I want to make clear these points in this paper.
First, I want to point out that an aluminum alloy structure, when compressed, will be in danger of buckling before reaches its elastic limit. Therefore it is important to find out this buckling stress . For the buckling stress of the box-style girder due to bending, I applied S. Timoshenko's famous formula of the rectangular plate in compression. I adopted the material affected by welding, and drew the stress-strain curve, from which I workedout the tangent modulus curve under the consideration that the required stress is beyond the proportional limit.
Next, I made a comparison between my buckling stress and the compressive unit stress for top flange from the Table VII of the paper, "A Review of Aluminum Crane "by A . H. Koept, and calculated backward the factor of safety to be 2.4 in the reasonable range of b/t.
Moreover, for the shearing force on the webplate of the box girder due to bending, I reckoned its maximum value by the formula of shear buckling.View full abstractDownload PDF (654K) -
Draft of the revised welding technic on corrosion resistance aluminium alloys for the examination test of weldersThe Committee Of Light Metals For Shipbuilding Ind, Sub-Committee of ...1962 Volume 12 Issue 4 Pages 255-279
Published: July 31, 1962
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSAs for the technical examination for welder who would engage to welding corrosion resistance aluminium alloys which are to be used in the hulls of warships and boats at the Defense Agency it was once proposed by the Technical Department of the Marine Headquarters of the said Agency in February 1955 and has been in force so far.
This standard involves the following:i) 2 pieces of test specimen each for tensile test and guided bend test, cut off from butt welding test specimen.
ii) Test specimen for tensile strength of the crisscross fillet welding, and the examination was erected in conformity with a given method, the fitness of welders being judged from its result.
However, the welding method of test specimen and the range applicable for the qualification have to agreat extent a preponderance of doing the procedure test on spot and is considered slightly complex for the technical examination.
In the early part of 1960, the expenses to prepare the revised standard of technical examination for welders who may engage of welding corrosion resistance aluminium alloys had been subsidized from the Marine Head- quarters of the Defense Agency. Simultaneously, a subsidy had been provided from the Light Metal Society.
Thus, the Engineering Work Standard Revision Sub-committee had been established in the Committee of Light Metals for Shipbuilding Industry and started to make a revised draft.
The sub-committee has discussed several times in their conventions a draft made in pursuant to ASME. regardless the previous standard, as well as the drafts propounded by each members of the sub-committee.
As the result, all tests which are considered possible technically have been carried out and reviewed minutely, arriving to the most appropriate to judge and discriminate as well as simplified examination method has been selected. In order to perform practically the selected method 399 test specimens (237 pcs butt welding, 162 pcs Fillet welding) have been made out by 12 welders who have different abilities.
For the butt welding the following tests and inspection were carried out:
External appearance inspection,
X-ray inspection,
Tensile test,
Guided bend test.
For the fillet welding:
External appearance inspection,
Inspection of fillet fracture.
As the above mentioned result, a draft for welders technical examination has been approved by the Marin Headquarters Department of the Defense Agency on March 15, 1961.View full abstractDownload PDF (2111K)
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