巻号一覧
10 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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森永 卓一, 財満 鎮雄, 中沢 繁夫, 柳葉 邦則1960 年 10 巻 2 号 p. 3-10
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーIn this paper, the phenomena in early stages of aging are studied by measuring the damping capacity, hardness, decrement of the oscillation of Harbert pendulum and specific volume on Al-Cu alloys which contains 3.1∼6.2% Cu in aluminium basis.
As the result, the damping capacity fluctuates widely in early stages like in the case of 17S or 2S which was previously reported on. The fluctuation is seen in Al-3.116% Cu alloy most widely, while it is less in 6.200% Cu alloy and 4.240% Cu alloy. As to the hardness curve, it seems that as the copper content increases, the aging time up to the saturated hardness number gets shortened slightly and the fluctuation of the hardness decrease but there is the fluctuation, which seems to be beyond the dispersion of the mesuring value of hardness during the period up to the saturated hardness in aging. These results correspond with the changes found out by measuring the decrement of the Harbert pendulum or by analysing the specific volume, and consistent with the previous consideration from the viewpoint of G. P. zone that the internal changes in early stages of aging up to intermediate precipitation are very complex, the local changes of the solubility are grow one after another, and the properties change fluctuately like the “wavelike form” and approach the saturated conditions.抄録全体を表示PDF形式でダウンロード (951K) -
村上 陽太郎, 河野 修1960 年 10 巻 2 号 p. 11-21
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーExperiments have been made to examine the effects of cold working on the rate of cluster formation and precipitation in Al-4%Cu or Al-1.8% Cu alloys with X-ray Laue Photographs, electron micrographs and measurements of micro-hardness. The correlation between cold woring and the excess vacancies retained in quenching was investigated with water quenched, air cooled and reverted specimens. The effects of cold working after aging at low temperature were also examined here.
The experiments provided evidence that the formation of the less stable G. P. (1) and G. P.
(2) is hindered, while the precipitation of the more stable θ' phase is accelerated.
The rate of precipitationis more rapid in water quenched specimens than in air cooled, or reverted materials. The increased rate is due to the fact that the lattice vacancies which are more than the equilibrium are retained in quenching. The suppressive effects of cold working are most remarkable in water quenched alloys.
The mechanism by which the rate of cluster formation is retarded may be due to two effects: one is the sweeping out of the quenched-in vacancies, which are necessary for solute diffusion, by the motion of jogs in dislocations during plastic deformation or the increase in the rate of annealing of quenched-in vacancies as a result of cold working; and the other is the formation of many smaller enriched clusters of solute atoms which are formed by the stronger binding interaction between solute atoms and lattice defects introduced by cold working.抄録全体を表示PDF形式でダウンロード (4763K) -
清水 恭治, 中谷 義三1960 年 10 巻 2 号 p. 22-35
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーOn the primary recrystallization process of the binary alloys which 9 elements, such as Mn, Cr, Si, Ti, Zn, Mg, Cu, Fe and Ni are respectively added to superpurity aluminium up to 2%, the growth rate of nuclei—G, the rate of nucileation—N, the rate of recrystallization—R and ther activiation energies—QR, QG, QN and the relationship between the as-recrystallized grain size—Df and N/G have been measured at the working degree of 5% and 10% respectively. From the results, the influences of temperature, deformation and added elements to properties of these alloys have been studied. The experimental results will be described in this paper and the theoretical considerations will be in the following paper.
The experimental results are summarized as follows:
(1) Under the working strain of ε, the following equation has been proposed on G of super-purity aluminium binary alloys.
Gε=(1-m)D1εΔF1/λRT+mD2ε(ΔF1-U)/λRT…eq. (2)
This equation shows that the smaller the diffusion coefficient D2 of added elements in solvent aluminium is, the greater the difference § of atomic size of both metals or the interaction energy U for foundary dislocation, and the more the amount m of added elements is, the more rapid decrease in G (Fig. 7)
(2) The effect of added elements on R shows the same tendency as that on N (Fig. 11, 16)
(3) The relationship between the as-recrystallized grain size Df and N/G is shown by the following equation: Df=k(N/G)n…eq. (9) Greater the N/G is, smaller is the Df (Fig. 20).
(4) In the case of up to 10% strain by elongation, while Mn, Cr and Si tend to coarsen the as-recrystallized grain size Df with the increase insamounts of their addition, other elements refine it (Fig. 21).抄録全体を表示PDF形式でダウンロード (1849K) -
磯野 英二1960 年 10 巻 2 号 p. 36-44
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーIn the drop- or stretch-forming of operationa of frames of airplane parts which consisted of the heattreatable 6061 alloy sheet, unacceptable products were made many times extraordigrain growth or orange peel in materials.
Sheets of six different thickness from three different manufactures were picked up and examined their tendency of grain growth and studied on the correlation between the forming process and the grain growth.
It seems that the tendency of grain growth is different according to the manufacturer although the grain size (0.05mm) are almost same. The grain growth area has poor mechanical properties compared with the normal area. When the cold work is applied it must be restricted to 5% only before the solution treatment and can be made more after the treatment. The grain size becomes the maximum value when the cold work reaches 6∼7% (about 11kg/mm2 load). When the grain size exceeds 0.1mm, the surface is completely covered with the orange peel effect.抄録全体を表示PDF形式でダウンロード (4956K) -
橋浦 広吉, 渡部 充1960 年 10 巻 2 号 p. 45-50
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーThe study was made mainly on the changes of grain size of primary silicon and eutectic structure, and those of specific gravity in aluminium-silicon alloy (20%Si) treated by polytetrafluoroethylene. The results obtained are summed up as follows:
(1) The grainsof primary silicon in the alloy are remarkably refined by adding polytetrafluoroethylene, or polytetrafluoroethylene together with negligibly small amount of phosphorus to the alloy.
(2) The most effective temperature when polytetrafluoroethylene is added, is 800°C.
(3) The most effective amount of polytetrafluoroethylene is 0.025%, where maximum size of primary silicon grain gets 0.02mm. But when more polytetrafluoroethylene is added, the effect of modification is reduced, because of unsatisfactory decomposition of polytetrafluoroethylene, and consequently the specific gravity of alloys is lowered.抄録全体を表示PDF形式でダウンロード (3773K) -
2～3のアルミニウム材料の白ブドウ酒に対する耐食性におよぼすイオン交換処理の影響につい森永 卓一, 財満 鎮雄, 加賀美 元男1960 年 10 巻 2 号 p. 51-55
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーThe corrosion tests of aluminium alloys, that is 1S, 2S, 3S and 52S which are used as anti-corrosion materials, are made with dry white wine which is treated by anion-exchage cation exchange method in double bed system.
The results are summarized as follows:
(1) As the dissolution of specimen in white wine cannot be controled in particular by the ion-exchange treatment, it is found out that the components of wine which influence largely to the corrosion are not affected by ion-exchanging. And, on the other hand, the occurrence of pitting is slightly delayed in the ion-exchanged wine than in the case of non-treated wine.
(2) It seems that 1S shows the best resistance to the attack of wine.
(3) The flaver and taste i.e. the characteristics of white wine deteriorates largely by dipping the specimen, but this deterioration may be prevented by ion-exchanging. And, in this case, the ion-exchanged wine does not seem to be so improved as in the case of ion-exchanged dry red wine.抄録全体を表示PDF形式でダウンロード (560K) -
椙山 正孝, 鈴木 寿1960 年 10 巻 2 号 p. 56-70
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーS.A.Pはアルミニウムの焼結品であり,高温における性能が従来の耐熱アルミニウム合金よりも遙かにすぐれているので,耐熱部品用材料として各方面から注目されている。そこでこの種材料の開発経過,種類,製造法,諸性能などをまとめて展望することとした。本稿によりS.A.P.がより広く認識され,検討されるよすがともなれば筆者の大いに喜びとするところである。抄録全体を表示PDF形式でダウンロード (4255K) -
飯能 次夫1960 年 10 巻 2 号 p. 71-78
発行日: 1960/03/31
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (2676K)
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