巻号一覧
37 巻, 3 号
選択された号の論文の10件中1～10を表示しています
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西川 精一1987 年 37 巻 3 号 p. 177-178
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーPDF形式でダウンロード (330K) -
今井 恒道, 西田 義則, 山田 守, 白柳 格, 松原 弘美1987 年 37 巻 3 号 p. 179-184
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーTensile strength and workability of Al/alumina short fiber composites fabricated by the high pressure casting method and cold rolled were investigated. The cold work of the composites was possible up to 20% of volume fraction of alumina fiber. The rate of the strength increase at the initial stage of rolling was large in high alumina fiber content composites and the limit of the strength increase was 21-22kgf/mm2 in all composites. The high temperature tensile strength decreased rapidly with temperature, and the strength also decreased to those of as-cast composites by annealing at 300°C. The increase in tensile strength seemed to be caused not by the degrees of fiber orientation, but by work hardening. The fracture strain of the composites decreased with volume fraction of fiber.抄録全体を表示PDF形式でダウンロード (1695K) -
世利 修美, 田頭 孝介1987 年 37 巻 3 号 p. 185-191
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーThe effect of silicon on corrosion behavior of Al-Si alloys has been investigated by means of immersion corrosion test and electrochemical mesurements. The corrosion weight loss increased with increasing silicon content in Al-Si alloys. Corrosion of Al-Si alloys in aerated 0.1 M NaCl solution has been controlled by the cathodic process of water reduction which reacts on the eutectic silicon which is segregated.抄録全体を表示PDF形式でダウンロード (1638K) -
池野 進, 福持 泰明, 上谷 保裕, 多々 静夫1987 年 37 巻 3 号 p. 192-198
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーThe effects of grain size and Mn on ductility of Al-1%Mg2Si-0.4%Si base alloys were examined by tensile test.
When grain size was large as 600μm, elongation was slightly increased with increase of Mn at peak aged (200°C) condition of the alloys containing upto 0.5%Mn. While, if grain size was so small as about 50μm, elongation was almost independent of Mn in the alloys containing 0.20.8%Mn.
Although grain size varied from 50 to 600μm, intergranular fracture surface was always observed at peak aged (150 and 200°C) condition of 0.5%Mn addition alloys, which had the Mn bearing dispersoids of a mean diameter of 0.2μm.
The slip band spacing was decreased with decrease of grain size in 0.5%Mn addition alloys.抄録全体を表示PDF形式でダウンロード (2620K) -
師岡 利政, 湯浅 栄二, 周 俊宏1987 年 37 巻 3 号 p. 199-206
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーMost of fiber reinforced metal are made by hot press or infiltration method. it is quite difficult to produce long products by either of the methods. If the powder rolling method can be used to make reinforced metal with continuous fiber, the range of the use of fiber reinforced products can be broadened and the economical benifit will be enhanced. In this study, the authors attempted to prepare fine wire reinforced aluminum plate by using the powder rolling method. Mechanical properties of the plate were investigated and the suitability of this process was appraised. The results obtained in this study can be summarized as follows: (1) It is possible to prepare the reinforced plate by using powder rolling method. (2) The tensile strength of the plate increased with increasing of the volume fraction of the wire and its value is reached to 300MPa at about 7% in volume fraction. (3) The Young's modulus of the plate increased with increasing of volume fraction of the wire and these values agreed with those calculated from the rule of mixing. (4) The density of the plate increased with increasing of the volume fraction of the wire. (5) The heat resistance of the plate is higher than that of the commercial aluminum.抄録全体を表示PDF形式でダウンロード (1692K) -
大滝 光弘, 南口 哲也, 宇都 秀之, 本間 梅夫, 雄谷 重夫1987 年 37 巻 3 号 p. 207-213
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーIビーム型鋳造割れ試験鋳型によつて,Al-2～20%Cu合金およびAl-1～7%Si合金試験片を作製するとともに,その最終凝固部に挿入した導波棒を介して凝固過程でのAE信号を計測し,凝固の進行,鋳造割れとAE信号との関係を調べた。凝固末期において明確に検出される連続型および突発型のAE信号は,凝固終了に伴うAE信号と鋳造欠陥の形成に伴うAE信号とに分類できる。凝固過程で生じる鋳造割れは粒界の3重点で形成されたひけ巣欠陥あるいはマイクロクラックが伝播して生じたものであり,マイクロクラックの形成時には連続型の,その伝播時には突発型のAE信号が検出されることを,今回の結果は示している。鋳造割れの著しいほど,AE信号の数と振幅は大きくなり,より早い時期にAE信号が検出されることに着目すれば,AE法によつて鋳造割れのオンラインモニタリングが可能であると思われる。抄録全体を表示PDF形式でダウンロード (1539K) -
世利 修美, 田頭 孝介1987 年 37 巻 3 号 p. 214-219
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーThe electrochemical measurements and immersion corrosion test in 0.1 M NaCl solution has been carried out to examine the effect of chromium on aluminium. The weight loss of Al-Cr alloys was unaffected by content of chromium (0.151.09%). Corrosion morphology of Al-Cr alloys was a type of exfoliation corrosion. Corrosion behaviors of Al-Cr alloys were explaned by galvanic corrosion model which has three linear parameters, difference in corrosion potentials, resistances of anodic polarization and cathodic polarization.抄録全体を表示PDF形式でダウンロード (1031K) -
小島 陽, 守田 芳和, 青柳 成俊1987 年 37 巻 3 号 p. 220-227
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーStrength of adhesive boundary and critical aspect ratio in steel wires (φ 1.6 mm) reinfbrced 6063 alloys composites had been investigated by means of the steel wirer-drawing test. The drawing test from the matrix metals were carried out with the specimens which had the various lengths of steel wire in 6063 alloys. The shear strength of adhesive boundary in the specimens treated in the T5 condition (180°C, 4 hr aging) increased by the T6 treatment (540°C, 1 hr→160°C, 24 hr aging). At the same time the critical aspect ratio in the T5-specimens decreased by the T6 treatment. The solid solution heat treatment improved the strength of adhesive boundary in those composites, and the intermetallic compound at the boundary was observed in the specimen which had been treated at 540°C for 24 hr.抄録全体を表示PDF形式でダウンロード (1744K) -
嶋影 和宜, 山本 裕司, 玉井 京子, 江島 辰彦1987 年 37 巻 3 号 p. 228-238
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーThe purification behaviors of liquid aluminiums containing impurity elements have been investigated by means of segregation process which utilizes segregation phenomena of solute in the solidification of liquid metal. After liquid aluminium was unidirectionally solidified under the conditions of ultrasonic vibration and mechanical stirring, the distribution of impurity concentration was examined against the solidified length. Copper, Magnesium and iron in liquid aluminium were used as impurity elements. The experimental results obtained are summarized as follows:
(1) For each aluminium alloy, the distribution of impurity concentration after the solidification was dependent on initial impurity concentration in liquid aluminium. These behaviors could be explained by the variation of the shape in the solid-liquid interface which is presumed by constitutional supercooled theory.
(2) When aluminium alloys containing low impurity were solidified with the conditions of ultrasonic vibration and mechanical stirring, the purification of aluminium alloys proceeded in accordance with theoretical solidified curve.
(3) The effects of ultrasonic vibration and mechanical stirring on the purification of aluminium alloys having the concentration of high impurity were larger than those of aluminium alloys containing low impurity. These results may suggest that the solid-liquid interface during the solidification is fully mixed with ultrasonic vibration and mechanical stirring and impurity elements escaped from the solid transfers easily to bulk layer in melt.抄録全体を表示PDF形式でダウンロード (1810K) -
根本 茂1987 年 37 巻 3 号 p. 239-253
発行日: 1987/03/31
公開日: 2008/07/23
ジャーナル フリーPDF形式でダウンロード (4008K)
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