| 细化元素对Al-5.0Cu-0.8Mn合金二次枝晶间距的影响 |
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| 引用本文： | 朱云翯,徐才录. 细化元素对Al-5.0Cu-0.8Mn合金二次枝晶间距的影响[J]. 航空学报, 1985, 6(3): 279-284 |
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| 作者姓名： | 朱云翯 徐才录 |
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| 作者单位： | 北京航空材料研究所(朱云翯)，北京航空材料研究所(徐才录) |
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| 摘 要： | 本文研究了冷却速度和钛、硼、钒、锆对Al-5.0Cu-0.8Mn合金晶粒尺寸和二次枝晶间距的影响。提高冷却速度减小了二次枝晶间距,在相同冷却条件下,加入钛、硼、钒、锆等细化元素后,由于其对枝晶生长的抑制作用,缩小了液固界面前沿的溶质富集区,明显地细化晶粒尺寸和二次枝晶间距;而且,降低了合金的二次枝品间距对冷却速度的敏感性。
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| 收稿时间： | 1984-11-12; |
EFFECT OF REFINING ELEMENTS ON DENDRITE ARM SPACING OF AI-5.0Cu-0.8Mn ALLOYS |
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| Zhu Yanhe,Xu Cailu. EFFECT OF REFINING ELEMENTS ON DENDRITE ARM SPACING OF AI-5.0Cu-0.8Mn ALLOYS[J]. Acta Aeronautica et Astronautica Sinica, 1985, 6(3): 279-284 |
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| Authors: | Zhu Yanhe Xu Cailu |
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| Affiliation: | Beijing Institute of Aeronautical Materials |
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| Abstract: | The effects of the cooling rate and the added elements Ti, B, V, Zr on the dendrite arm spacing and grain size of the Al-5.0Cu-0.8Mn alloy are investigated.The results show that the enhancement of the cooling rate decreases the dendrite arm spacings of the alloy, and at the same cooling rate the addition of the refining elements such as Ti, B, V, Zr narrows the solute-rich band in the solid-liquid interface because the elements restrain the growth of the dendrite. In result, the dendrite arm spacing and grain size are refined significantly, and the sensitivity of the dendrite arm spacing to the cooling rate is reduced. |
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