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Volume 13 (1963)
- Issue 6 Pages 379-
- Issue 5 Pages 305-
- Issue 4 Pages 225-
- Issue 3 Pages 141-
- Issue 2 Pages 67-
- Issue 1 Pages 1-
Volume 13, Issue 6
Displaying 1-9 of 9 articles from this issue
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Takuichi MORINAGA1963 Volume 13 Issue 6 Pages 379-381
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (494K) -
On the mechanical properties and electrical conductivity of the welded products of Al-Mg-Si alloy with different Mg/Si ratioShiro TERAI, Yoshio BABA1963 Volume 13 Issue 6 Pages 383-399
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThis is to report on the study of the cracking in the heat-affected zone and the mechanical properties and electrical conductivity of the welded products of Al-Mg-Si alloy with different Mg/Si weight ratio.
The findings are as follows:
(1) Weldability of Al-Mg-Si alloy is affected by the content of magnesium and silicon. Al-Mg-Si alloys containg Mg2Si of 0.5% to 1.0%, in the region of excess-Si, show the maximum tendency of weld heat-affected zone cracking.
(2) Among the various kinds of filler metals, for example the same alloy, Al-0.8% Mg alloy and 4043 alloy, the welded products by the filler metal of 4043 alloy show the minimum tendency of weld heat-affected zone cracking.
(3) As to the joint efficiency of welded products, annealed material has the joint efficiency of 100% in tensile strength, 120 to 150% in proof stress and 100% in electrical conductivity after welding, and such efficiency is regardless of the kinds of filler metals used in this experiment. Therefore, it is practically available without any trouble to use annealed materials for welding. T6 heat treated material has the joint efficiency of 50% to 60% in strength after welding and it is affected by the Mg/Si ratio, the filler metals and the speed of welding. Its efficiency can also be increased a little by the precipitation heat treatment after welding. However, it is more desirable to narrow the weld heat-affected zone by using the high speed welding method.View full abstractDownload PDF (3070K) -
On the cutting resistance in the case of turning aluminium 11S, 17S and 56SShigeo ZAIMA, Susumu KAMO, Kazuo ARAO1963 Volume 13 Issue 6 Pages 400-404
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe turning tests were made on three sorts of wrought aluminium, that is, 11S which is well known as most machinable one, 17S which is looked upon typical high tension aluminium and 56S which is used as anti-corrosive alloy, and their machinability were examined. It seems that the machinability must be discussed upon several factors, for example, the cutting resistance, the roughness of turning surface, the tool life, the chip formation, the chip disposal and others. In this paper, the cutting force and the chip disposal are mainly studied and in the following report, the roughness of turning surface and the built-up edge will be discussed. The results are summarized as follows:
1) The larger the rake angle of tool, the smaller the cutting resistance, and in the case of 17S and 56S, especially, the cutting resistance increases radically when the rake angle gets less than 10°. The cutting resistance is not affected by the cutting speed (in this experimental case, 37-183m/min), and the resistance increases in proportion to the increasing in the feed in constant rake angle.
2) The cutting resistance increases in order of 11S, 56S and 17S, and it seems that there is no connection between the resistance and the tensile strength or the hardness.
3) The trouble seems to increase in the chip desposal in order of 11S, 56S and 17S. In the case of 17S, especially, a continued straight flow type chip is apt to grow, for which a chip breaker is necessary.View full abstractDownload PDF (809K) -
On the roughness of cutting surface in the case of 11S, 17S and 56SShigeo ZAIMA, Masatugu IIO, Tameyuki KITAMURA1963 Volume 13 Issue 6 Pages 405-409
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn succession of previous report, this relates to the discussion about machined surface quality obtained by turning 11S, 17S and 56S alloys. For the measurement of surface roughness, Ohgoshi type roughness tester is used (contact neadle type, magnifies 50 times and 500 times in horizontal and vertical direction respectively).
The roughness of cutting surface, in case of 11S alloy, agrees with that of feed mark calculated theoretically. But in case of 17S and 56S alloys, this does not agree with theoretical one. In view of this fact, it can be said that the machinability of 11S alloy is superior than that of remaining alloys.
The built up edge was put under research to clean up the cause of roughness difference between test and theoretical result and its results showed that the built up edge of 11S alloy is less than that of 17S and 56S alloys. Furthermore, according to the type of adhesion on the surface, turnings were classified in three types and with this classification, occurence of built up edge being affected by turning condition was presumed and the machinability of these alloys was concluded.View full abstractDownload PDF (997K) -
Effect of additive elements on the cast structure of Al-Fe (0.5) alloyYoshizo NAKATANI, Kyoji SHIMIZU1963 Volume 13 Issue 6 Pages 410-417
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSMany investigations relating to the effect of additive elements on the cast structure of aluminium and its alloys have already been reported.
In this paper, by addition (range 0.01-0.1%) of 39 differenet elements and alloys to the Al-Fe (0.5%) alloy, their effects on grain size and dendritic structure were reoprted. Furthermore basing on the cooling curve recorded in casting procedure, some relation between the grain size and the undercooling degree was discussed. The summerized results are as follows:
1) The elements which were found effective to form fine structure are Ti, B, Zr, Ta, Nb, V, W, Mo and Ti-B, and all these elements react with Al peritectic, while Be, Y, Li and Si present fine structure with eutectic reaction.
2) In regard to the relationship between grain size and undercool ing degree, it can be said that the grain size goes down finer, if the undercooling degree of primary α becomes less.
3) The elements which refine dendritic structure are five, i, e, Ti, Ta, Na, Ca, Ba and mischmetall.View full abstractDownload PDF (2573K) -
Effect of additive elements on the cast grain size of Al 99.99%, Al Mg (2, 5, 7%), Al-Cu (4%) and Al-Si (8, 10, 15%) alloysYoshizo NAKATANI, Kyoji SHIMIZU1963 Volume 13 Issue 6 Pages 418-430
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn the previous report (part I), the effect on the cast structure and grain refining character by addition of 39 lements to Al-Fe (0.5%) alloy was reported. In this second report, 12 elements (Ti, Ta, Zr, B, Nb, W, V, Mo, Be, Y, Li, Si) which showed the grain refining effect were added to Al. 99.99%, and furthermore 5 elements (Ti, Ta, Zr, Be, Y) were added to Al-Mg, Al-Cu and Al-Si alloys and their refining influences were investigated.
On the high purity Al-Ti alloy, supposing its grain refining mechanism with the result of microscopic observation, crystal nucleus substance was qualitatively analysed with electron micro-analyser.
The results of investigation were summerized as follows:
1. 12 elements (Ti-Si) showed cast grain refining character on Al. 99.99%, and the elements which refine the structure finer, reduce undercooling degree lower.
2. The results of addition of 5 elements to Al-Mg, Al-Cu and Al-Si alloys showed that Ti, Ta, Zr, which make peritectic reaction with Al, are effective for grain refining exept in case of Be and Y which react eutectically with Al. The relation between undercooling degree of primary α and grain size is almost same as in case of Al 99.99%.
3. Considering from the results obtained by adding Ti to Al-Si alloy, it can be said that the grain refining effect of Ti is only obtainable when the primary structure is in α solid solution in Al and this effect is increased with the increase of existing α
4. A phase which appears in the center of petal-shaped crystal of high purity Al-Ti alloy is to be considered as nucleus substance and which was revealed having Ti and Al constitution after qualitative analysis by electron micro-analyser. In respect on this point further report will follow.View full abstractDownload PDF (4274K) -
Study on vapor pressure of magnesium containing beryllium in molten temperature rangeChuyo HISATSUNE, Tsutomu HAGIHARA1963 Volume 13 Issue 6 Pages 431-436
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe vapor pressure of magnesium and its alloys containing beryllium was measured by transportation method in temperature range of 700-850°C, and the vaporization rate of magnesium under vacuum condition through oxide film was studied at the temperature of 550-600°C.
The protective film containing beryllium oxide which showed protective behaviour on oxidation of magnesium alloys (see the previous report) suppresses the vaporization of magnesium under the temperature of below 600°C.
In molten magnesium alloys containing beryllium, the relationship between decrease in vapor pressure and behaviour protecting from burning could not be found clearly.View full abstractDownload PDF (705K) -
Takuichi MORINAGA, Yoshio KATO1963 Volume 13 Issue 6 Pages 437-442
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSTo know heat resisting and sulphurizing properties of hot dipped steel material, several tests done were by heating that material in the air and in the hydrogen sulphide atomosphere, and after 5hrs heating, increase of the weight is measured.
In case if the aluminizing is done with same fabricating condition, increase of the weight of the specimen is greater proportionally to the increase of carbon content in the steel.
The proportion of weight increase of aluminized steel to that of base steel was ascertained as much as 30.3% in case of heating in the air and 10.3% in case of hydrogen sulphide.
The time-weight increment curve is found to be parabolic.
Several specimens, to know their corrosion properties, were tested to measure weight loss and electrode potential in the solution of sod. chloride, dil. sulphuric acid and sod. hydroxide.
Corrosion resistance was found excellent in 3% and 10% of sod. chloride solution, as well as in 1/1000mol sulphuric acid solution. In the solution of hydroxide, Fe-Al layer well protects effectively the base steel material.View full abstractDownload PDF (1403K) -
1963 Volume 13 Issue 6 Pages e3
Published: 1963
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (42K)
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