軽金属
Online ISSN : 1880-8018
Print ISSN : 0451-5994
ISSN-L : 0451-5994
検索
詳細検索
OR
閲覧
検索
63 巻, 7 号
選択された号の論文の3件中1～3を表示しています
すべての抄録を表示する
    • |<
    • <
    • 1
    • >
    • >|
研究論文
  • Al–Mg–Si合金の多段時効挙動に及ぼす予備時効温度の影響
    高木 康夫, 増田 哲也, 里 達雄
    原稿種別: 研究論文
    2013 年 63 巻 7 号 p. 245-252
    発行日: 2013/07/30
    公開日: 2013/08/30
    DOIhttps://doi.org/10.2464/jilm.63.245
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
    The effect of pre-aging temperature on the natural age hardening and bake hardening behavior of Al–Mg–Si alloys was investigated by means of Vickers hardness test, tensile test, differential scanning calorimetry analysis (DSC) and transmission electron microscopy (TEM). Both the hardness and yield strength change with the natural aging time indicating that the lower pre-aging temperature increases the natural age hardening and decreases the bake hardening response. The DSC analysis confirms that the cluster (1) is formed during natural aging after the pre-aging treatment and the amount increases with the natural aging time. And then, increased pre-aging temperature suppresses the formation of cluster (1), but even if the case of specimens pre-aged at 383 K, the formation of cluster (1) started after natural aging for a longer time than 10.4 Ms. These results are explained by taking into consideration that the remained solute Si, Mg atoms and excess vacancies depend on the amount of cluster (2) formed during pre-aging.
    抄録全体を表示
    PDF形式でダウンロード (1445K)
  • Al–Si–Cu系ダイカスト合金の半凝固状態の引張特性
    進士 啓太, 高橋 弘樹, 本山 雄一, 吉田 誠
    原稿種別: 研究論文
    2013 年 63 巻 7 号 p. 253-259
    発行日: 2013/07/30
    公開日: 2013/08/30
    DOIhttps://doi.org/10.2464/jilm.63.253
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
    True stress–true strain curve of JIS AD12.1 (A383.0) alloy was obtained by tensile test in the partial solidification state for predicting residual stress and distortion of aluminum castings. It was found that tensile strength in true stress–true strain curves decreased with increasing temperature and decreasing strain rate. In addition, most of true stress–true strain curves showed constant stress with increasing strain. Thus, the constitutive equation taking account of strain-rate-dependence and stress saturation in the partial solidification state should be used in the thermal-stress analysis during solidification. Material constants of Norton creep law of JIS AD12.1 alloy in the partial solidification state were successfully obtained for the first time in the world.
    抄録全体を表示
    PDF形式でダウンロード (916K)
解説
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top