巻号一覧
27 巻, 3 号
選択された号の論文の11件中1～11を表示しています
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広沢 栄一1963 年 27 巻 3 号 p. 95-98
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーThe fiber textures developed in an extruded 2S aluminium alloy rod have been studied as a function of the position in the rod. The result shows that there are three different zones in the rod; central, intermediate and surface zones.
The central zone has an ordinary double fiber texture, [111]+[100], while the intermediate zone has a double fiber texture, inclined spiral [111]+simple [100], and the surface zone has a texture composed of two preferred orientations (110)[\={1}12] and (001)[100]. The transition of the texture from the central zone through the intermediate one is continuous and gradual.抄録全体を表示PDF形式でダウンロード (258K) -
湯川 夏夫, 武田 修三1963 年 27 巻 3 号 p. 99-105
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーBy means of hardness measurement and microscopic observation, the aging characteristics of Cr-Mo-Fe alloys were investigated, on ternary alloys containing 5∼65%Cr and 5∼30%Mo, as well as a CM-469 alloy (60%Cr, 25%Mo, bal.Fe), prepared by rapid melting in a carbon-resistance furnace and in an inert arc furnace, respectively. The alloys were solution treated at 1250°C, and then aged at 600°∼900°C for period up to 1000 hrs. The results obtained are summerized as follows: (1) Age-hardening takes place in the α-phase region of the ternary system due to the precipitation of ε-, χ-, and σ-phases, respectively, according to Cr content. (2) In alloys with less than about 50%Cr, their hardness in solution treated as well as age hardend states, and their optimum aging temperature are raised with increase of Cr and Mo contents. (3) In alloys with more than about 50%Cr, the precipitation of σ-phase takes place very slowly, its precipitation hardening being raised with increase of Mo content but contrarily with decrease of Cr content; this suggests the superiority of Cr-base alloys in creep-resisting properties at high temperatures. (4) Differences in aging characteristics due to melting method were also discussed for a CM-469 alloy, arc-melted versus air-melted.抄録全体を表示PDF形式でダウンロード (773K) -
湯川 夏夫, 武田 修三1963 年 27 巻 3 号 p. 105-112
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーBy means of mechanical and metallographical tests the high temperature bending creep characteristics of Cr-base alloys were investigated, on Cr-Mo-Fe alloys and some alloys in which a part of Fe was replaced with 2∼6%Co, 1%Cb and 0.5%B, or all of Fe with Ni. The specimens were prepared by rapid melting in a carbon-resistance furnace and injecting into a silica tube. The results obtained are summarized as follows: (1) The associated changes in creep strength, hardness and microstructure show that high temperature properties of Cr-Mo-Fe alloys mainly depend on the dispersed precipitation of σ phase in α matrix. The creep strength is most excellent in alloys containing 60%Cr and 20∼30%Mo. (2) The creep strength of solution-treated alloys are found to be more excellent than that of cast alloys. (3) Effect of Co on the creep characteristics of Cr-Mo-Fe alloys is not so remarkable, because the precipitation of σ phase is increased by replacing Fe with Co, this resulting in an embrittlling of the alloy. (4) The creep strength of Cr-Mo-Fe alloys is increased to some extent with addition of 1%Cb or 0.5%B. (5) Cr-Mo-Ni alloys are found to be harder and more brittle than Cr-Mo-Fe alloys, owing to the increase of σ phase in amount and the martensitization of β phase; thus their creep strength is low except in the case of 60%Cr-30%Mo-10%Ni alloy.抄録全体を表示PDF形式でダウンロード (1038K) -
角野 浩二, 山本 美喜雄, 川崎 要造, 角野 雅恵1963 年 27 巻 3 号 p. 112-118
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーIn order to elucidate the relationship between the work-hardening characteristics of copper foil crystals 10.0 and 50.8 microns thick, which were determined in a previous paper, and dislocation phenomena occurring in them, a treansmission electron-microscopical observations have been made on distribution patterns of residual dislocation in the foil crystals as dependent on the strain, tensile direction, and specimen thickness during deformation.
Dislocation tangles have been observed already at an early stage of deformation in a foil crystal showing the lowest value of the work-hardening rate. Dislocation tangles developing over only one slip plane have been found in foil crystals showing low-hardening rates. On the other hand, the development of cell structure has been found always in foil crystals with high work-hardening rates. The dislocation cell structure becomes more complex and its size decreases as the strain increases. Dislocation configurations which can be regarded as showing the formation of sessile dislocations and the pile-up against them have also been observed.
It is suggested that the dislocation cell structure is formed as the result of irregular and complex motions of dislocations due to the complex distribution of the internal stress field originated from dislocations accumulated in foil crystals during deformation.抄録全体を表示PDF形式でダウンロード (1825K) -
和田 次康1963 年 27 巻 3 号 p. 119-121
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーThe shape of the austenite loop in iron-titanium system has been determined by a dilatometric method using specimens prepared by vacuum melting and wet-hydrogen treatment. The results showed that the loop has no minimum point which has been reported by Roe and Fishel. The loop obtained is thermodynamically reasonable. The parameter ΔFTi+ΔwFe-Ti, the sum of the energy difference between hypothetical fcc and bcc phases of pure titanium and the difference in interchange energy of fcc and bcc alloys, is obtained to be 2.0 kcal/mol as ΔFTi is estimated to be about or less than 500 cal/mol, ΔwFe-Ti may be 2.0∼1.5 kcal/mol. These values are reasonable in comparison with those of vanadium and chromium.抄録全体を表示PDF形式でダウンロード (221K) -
富田 貞美1963 年 27 巻 3 号 p. 122-125
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーAccording to the experimental study on magnetic thin films prepared by electroplating, it was found that magnetic anisotropy is changed by surface treatments of substrate and condition of electroplating. Permalloy film deposited on copper cylinder, which was placed in concentric position to surrounding anode, has showed a particular uniaxial anisotropy.抄録全体を表示PDF形式でダウンロード (367K) -
門間 改三, 須藤 一1963 年 27 巻 3 号 p. 125-130
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーRecently, with increasing need of high working stress level of steels, metallurgists have had another look at martensite and found that some heat-treated medium carbon steels can have considerable toughness with ultra high strength. In these cases, it is important to get the correlations between the fatigue strength and well known low temperature temper brittleness of steels or so called “A-brittleness”. From these stand points, this study was carried out to get an account of the influence of tempering temperature on the fatigue properties of a low carbon martensite steel. Both unnotched and notched bars were tested at room temperature with “Amsler High Frequency Vibrophore” which operated at frequency of 110±10 c.p.s. under alternating tension-compression load. In addition, tensile, hardness and impact properties were tested. The results obtained in this paper are as follows: When unnotched bars were used, the minimum fatigue strength was obtained by tempering at about 300°C. Namely, the existence of a correlation between “A-brittleness” and fatigue strength of tempered steels was confirmed. However, when notched bars were used, the substantial effects of temperings temperatures on endurance limit could not be found.抄録全体を表示PDF形式でダウンロード (581K) -
白川 勇記, 大原 亨, 阿部 健1963 年 27 巻 3 号 p. 130-133
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーThe light figures were studied to determine the orientation of columnar grains of Alnico permanent magnet. As the results, it was found that the solution of 4 cc concentrated chloric acid plus 1cc liquid bromine plus 44 cc methylalcohol is the best reagent for observation of figures on the three principale crystallographic planes and that the growth direction of grains of the columnar Alnico magnet on the market is near in the direction [100].抄録全体を表示PDF形式でダウンロード (482K) -
佐藤 史郎1963 年 27 巻 3 号 p. 134-139
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーAn investigation has been made to determine the corrosion resistance of binary and commercial copper-nickel base alloys in water and steam at elevated temperature. The tests were conducted by exposing the specimens to degassed or oxygen bearing water and steam at 200° to 350°C under saturated pressure for 250 hours. The results obtained were as follows: (1) In perfectly degassed condition, corrosion by water and steam increased with increasing of nickel content of alloys, but no severe corrosion was observed. (2) In oxygen bearing condition, severe corrosion of exfoliating, pitting, or intergranular type was observed on Cu-10∼90%Ni alloys except Monel metal by exposure to water and steam at 300° or 350°C. The exfoliating corrosion which was observed in above test was similar to that we have ever experienced in 70-30 cupronickel tubes used in feed water heater of power plant. (3) It is considered that severe corrosion by oxygen bearing water or steam at elevated temperature is due to the action of hydrogen gas which is evolved at the metal surface by selective oxidizing reaction of water and steam to exfoliate the oxide film. (4) Corrosion resistance of Monel metal containing 1.24% of iron to oxygen bearing water and steam is superior to that of binary alloys. This fact shows that iron is effective to form the protective films.抄録全体を表示PDF形式でダウンロード (1166K) -
太田 陸奥雄1963 年 27 巻 3 号 p. 140-145
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーThe changes of electrical resistance and small angle scattering of X-ray for Al-Zn alloys aged at various temperature were compared with the cases of Al-Ag alloys in order to know the behaviour of zones during the reversion treatments. Results obtained are as follows: (1) Small angle scattering of CuKα radiation from Al-30 wt%Zn alloys annealed at temperatures higher than 94°C show that zones exist at these temperatures. (2) There are maximum in isothermal aging curves obtained at 130°∼140°C for Al-10 wt%Zn alloy. Therefore, zones are formed at these temperes. (3) At temperatures higher than 94°C, electrical resistance of specimens of an Al-10 wt%Zn alloy decreases when the annealing temperature is raised, and increases again when temperature is lowered. These results support the above mentioned existence of zones. (4) Electrical resistance of specimens of aged Al-Zn alloys is decreased by reversion treatment to the values which are obtained by annealing the as quenched specimens for same period at same temperature as reversion treatments. (5) Electrical resistance of Al-Ag alloys is increased by reversion treatments to the values which are obtained by annealing the as quenched specimens for same period at same temperature as reversion treatments, but does not arrive at the as quenched value. (6) On re-aging, electrical resistance of specimens of Al-Zn alloys increases slowly, but that of Al-Ag alloys decreases.抄録全体を表示PDF形式でダウンロード (598K) -
1963 年 27 巻 3 号 p. 146
発行日: 1963年
公開日: 2008/04/04
ジャーナル フリーPlease see PDF. Wrong:Photo. 6(b) Right:[Please see PDF]抄録全体を表示PDF形式でダウンロード (29K)
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