| タイトル | Secondary and tertiary dendrite arm spacing relationships in directionally solidified Al-Si alloys |
| 著者（英） | Grugel, R. N. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1993-02-01 |
| 言語 | eng |
| 内容記述 | Secondary, lambda sub 2, and tertiary, lambda sub 3, dendrite arm spacings have been measured from Al-Si alloys which were directionally solidified as functions of growth velocity, V, temperature gradient, G, and composition, Co. Both lambda sub 2 and lambda sub 3 decreased as the imposed growth velocity and silicon concentrations were increased, and for each function a systematic variance in the rate was seen. Complications with measuring secondary arm spacings are shown and it was found that the tertiary arm data agree much better with coarsening theory, the implication being that lambda sub 3, when measurable, is a more representative and reliable measure of the solidification history than lambda sub 2. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 93A27281 |
| 権利 | Copyright |
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