巻号一覧
51 巻, 5 号
選択された号の論文の6件中1～6を表示しています
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研究論文
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小池 俊勝, 山縣 裕, 金武 直幸2001 年 51 巻 5 号 p. 267-272
発行日: 2001年
公開日: 2007/03/30
ジャーナル フリーA continuous cast aluminum alloy, AFC12 (Al–12Si–4Cu–0.5Mg) and powder metallurgical aluminum alloys, AFP10 (Al–10Si–5Fe–1Cu–0.5Mg–1Zr) and AFP20 (Al–20Si–5Fe–1Cu–0.5Mg–1Zr) were developed for high-performance forging pistons. Their mechanical properties at room temperature to 623 K, corresponding to the temperature range in the practically working piston, were investigated in comparison with a conventional cast-piston alloy, JIS AC8A aluminum alloy. The mechanical properties were measured after forming under the condition for the piston forging. Room temperature hardness of the AFP10 and AFP20 changes scarcely even after exposition at the elevated temperatures. The AFP20 has higher tensile strength, proof stress and fatigue strength than the AC8A at whole temperature range investigated, while those of the AFC12 are higher than those of the AC8A at a temperature below 423 K. It is concluded that the forging pistons of the AFC12 and AFP20 are expected to improve their performances at a low and whole working temperature ranges, respectively.抄録全体を表示PDF形式でダウンロード (697K) -
古閑 伸裕, 大山 和義2001 年 51 巻 5 号 p. 273-278
発行日: 2001年
公開日: 2007/03/30
ジャーナル フリーIn the field of automobile manufacturing, in order to reduce car weight, the introduction of aluminum components is being promoted. Structural components such as suspension arms, which require high strength, are some components that are to be replaced by aluminum components. Under these circumstances, in this study, we investigated the possibility of obtaining high-strength joining of aluminum alloy parts of circular pipe and bar by the shear joining method, in which plastic deformation, without influence of heat and other factors, is utilized, using finite-element analysis and experiments. The results indicated that if 1) the amount of punch penetrating into the material, 2) the clearance between the punch and the hole, and 3) the curvature of the punch edge, which affect the joining strength, are optimized, we can obtain sufficient joining strength of suspension arms.抄録全体を表示PDF形式でダウンロード (486K) -
松田 健二, 藤井 良, 川畑 常眞, 上谷 保裕, 池野 進2001 年 51 巻 5 号 p. 279-284
発行日: 2001年
公開日: 2007/03/30
ジャーナル フリーThe effect of the amounts of Mn and excess Si on the precipitation sequence of 6082 aluminum alloys was investigated by a micro-vickers hardness measurement and transmission electron microscope observation. Peak hardness of specimens aged at 473 K increases with increasing amount of excess Si, while Mn content does not affect their peak hardness. Addition of Mn changes the types of precipitates in the specimens. The precipitates observed in the present study are similar to those in the balanced alloy, even though these alloys contain Si in excess. This tendency becomes marked when aging temperature becomes higher than 473 K. This is because Mn reacts Si in the matrix, forming the Mn-dispersoid and then excess Si content in the matrix decreases. On the other hand, the interface between the matrix and the Mn-dispersoid acts as the sink of the quenched-in vacancies, and the formation of GP zones is suppressed. Thus, the decrease of excess Si and the suppression of the GP zones formation lead to an inhomogenous precipitation of the metastable phases in the matrix.抄録全体を表示PDF形式でダウンロード (727K) -
井上 誠, 岩井 正雄, 鎌土 重晴, 小島 陽2001 年 51 巻 5 号 p. 285-289
発行日: 2001年
公開日: 2007/03/30
ジャーナル フリーPurification parameters of the vacuum distillation for magnesium alloys were studied. The AM60B magnesium alloy is mainly used as the raw material in this study. The condensation ratio decreased with the temperature of condenser up to 460°C in the pressure of about 1 Pa and the condensation does not occur significantly at 480°C. The content of Zn in the deposited magnesium decreases with increasing the condensation temperature. The chemical compositions of the deposited material at 440°C agrees with the JIS for the pure magnesium ingot. The AM60B magnesium alloy purified at 620°C is comparable to that of AM100A magnesium alloy purified at 600°C.抄録全体を表示PDF形式でダウンロード (377K)
解説
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池田 勝彦, 加藤 浩史2001 年 51 巻 5 号 p. 290-296
発行日: 2001年
公開日: 2007/06/01
ジャーナル フリーPDF形式でダウンロード (1062K)
連載講座
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阿部 敬三, 山本 啓二, 閑 浩之2001 年 51 巻 5 号 p. 297-304
発行日: 2001/05/30
公開日: 2021/06/30
ジャーナル フリーPDF形式でダウンロード (10764K)
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