巻号一覧
54 巻, 12 号
選択された号の論文の7件中1～7を表示しています
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研究論文
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鈴木 信行, 地西 徹2004 年 54 巻 12 号 p. 551-555
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーTo develop a new SPF process using tailored blank technique, a series of forming experiments were carried out on high strength aluminum alloy 7475 SPF grade sheets. Some rectangular blank sheets, with a butt weld line at each longitudinal center, were prepared using friction stir welding (FSW) under several conditions. The blank sheets were experimentally formed into a slender pan with rectangular section, for intended reduction of thickness in half approximately, provided the forming was successful. Some blank sheets were formed successfully with decreased thickness on the joined line along with the reduction on the base metal. Breakage in base metal was seen on tensile test pieces, including joined line after the forming. And it was found that a drastic change of grain size caused by superplastic forming, from 1000 μm to 5 μm, happened in some conditions of FSW. As a result, the relationship between the superplastic formability of the joined line and the conditions of FSW was analyzed, and the possibility in the practical application of the new process was verified for 7475 aluminum alloy.抄録全体を表示PDF形式でダウンロード (2525K) -
康井 義明, 持田 麻衣, 宝蔵寺 泰光2004 年 54 巻 12 号 p. 556-561
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーThe honeycomb structure component has the excellent performance of the impact crushing energy absorption as a light-weight structural element. For the purpose of the improvement in the energy absorption ability and the reduction of initial peak stress, the impact crushing behavior was experimentally conducted about some types of foam filled aluminum honeycomb cells under axial dynamic impact load, after checking fundamental behavior which was mostly agreement with an experiment and numerical analysis in a honeycomb simple substance cell. They were performed about various urethane foam filled honeycomb cell, two-layered cell models and the filling honeycomb cells attached chloroprene rubber on the face panel. It was found that the cell filled with urethane foam is obtained good absorption ability. And also, the filling cell attached rubber on the face panel of the honeycomb has considerable good effect in comparison with others for the reduction of the initial peak stress. These appliances were observed to be the effective structural member design for the energy absorbing ability.抄録全体を表示PDF形式でダウンロード (2330K) -
石黒 農, 牧 清二郎, 森 謙一郎2004 年 54 巻 12 号 p. 562-566
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーA thermo-mechanical treatment process using resistance heating was developed to improve mechanical properties of heat treatable aluminum alloy sheets. In this process, the solutionized aluminum alloy sheets are rolled at room temperature, and then are heat-treated by combination of rapid resistance heating and water quenching to solutionize the sheet without the growth of grains. The process was applied to Al–0.60 mass%Si–0.74 mass%Mg alloy (A6061) sheet to confirm the effectiveness of the process. The sheet reduced from 5 mm to 0.5 mm by multi-pass rolling was resistance-heated up to 893 K in a very short time of 2 s, and immediately water-quenched. The grain of the sheet produced by the present process were reduced to about half of the conventional ones. This led to an improvement of the mechanical properties, i.e. the Vickers hardness and the limiting drawing ratio were increased by 10% and 5%, respectively. It was found that the present thermo-mechanical treatment process is effective in improving the mechanical properties.抄録全体を表示PDF形式でダウンロード (834K) -
阿相 英孝, 酒井 郁洋, 生出 章彦, 小野 幸子2004 年 54 巻 12 号 p. 567-572
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーFormation behavior and structure of newly established anodic films grown on pure magnesium and AZ alloys were studied in organic electrolyte containing 1 mol·dm−3 triethylamine/ethylene glycol solution with varying water content. The growth behavior and appearance of anodic films were significantly affected by water content. In the region between 10 and 30% of water content, compact barrier-type films were obtained both 99.6% Mg and AZ91D. The surface appearance of obtained films was transparent, which was different from those formed usually in aqueous solutions. In addition, these films possessed a high order of corrosion resistance. In the case of electrolyte containing water below 10% or 50%, the appearances were yellowish white and whitish gray, respectively. The composition of anodic films determined by FT-IR and GD-OES analysis showed the incorporation of organic substance into the anodic film. The amount of incorporated organic species increased with decreasing water content in the electrolyte.抄録全体を表示PDF形式でダウンロード (1639K) -
高田 尚記, 吉田 冬樹, 池田 賢一, 中島 英治, 阿部 弘2004 年 54 巻 12 号 p. 573-578
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーIn present study, abnormally coarsened grains in high purity aluminum foil sheets with cube texture ({100} ‹001›) after a final annealing was analyzed using SEM/EBSP method. Most of abnormally coarsened grains had Goss ({110} ‹001›) or S ({123} ‹634›) orientations. The coarsened grains with Goss and S-orientations were surrounded by Σ5 and Σ7 coincidence boundaries, respectively. It was found that these coincidence boundaries would enhance the abnormal grain growth of Goss and S oriented grains and that these grains would grow using energy of sub-boundaries between cube-oriented grains as the driving force. The distribution of Goss oriented grains in the partially annealed foil sheets was evaluated by SEM/EBSP method. It was clarified that many Goss-oriented grains were distributed in the transition band on the central layer of the sheets.抄録全体を表示PDF形式でダウンロード (5804K)
解説
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和田 健二, 褚 松竹, 井上 悟2004 年 54 巻 12 号 p. 579-585
発行日: 2004年
公開日: 2007/02/20
ジャーナル フリーPDF形式でダウンロード (3525K)
連載講座
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内海 能亜2004 年 54 巻 12 号 p. 586-593
発行日: 2004/12/30
公開日: 2021/06/30
ジャーナル フリーPDF形式でダウンロード (2920K)
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