| Al－Cu合金快冷的组织形貌 |
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| 引用本文： | 徐永利,季道馨,陈昌麒.Al－Cu合金快冷的组织形貌[J].航空学报,1994,15(7):887-890. |
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| 作者姓名： | 徐永利 季道馨 陈昌麒 |
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| 作者单位： | 北京航空航天大学102教研室,北京,100083 |
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| 摘 要： | 采用自制超声气体雾化快速凝固制粉装置对Ａｌ－４．５％Ｃｕ（ｗｔ）合金进行了研究,探讨了冷却速度与合金组织形貌间的关系,研究了冷却速度对合金凝固过程及溶质分配的控制机制,得到了平直凝固界面失稳的临界冷却速度Ｔｃ,并用显微组织相似定律对实验结果进了比较。
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| 关 键 词： | 快速淬火 铝合金 微观结构 |
| 收稿时间： | 1992-03-06 |
| 修稿时间： | 1992-10-12 |
MICROSTRUCTURE AND MORPHOLOGY OF RAPIOLY COOLED Al-Cu ALLOYS |
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| Xu Yongli,Ji Daoxing,Chen Changqi.MICROSTRUCTURE AND MORPHOLOGY OF RAPIOLY COOLED Al-Cu ALLOYS[J].Acta Aeronautica et Astronautica Sinica,1994,15(7):887-890. |
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| Authors: | Xu Yongli Ji Daoxing Chen Changqi |
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| Institution: | Faculty 102,Beijing University of Aeronautics and Astronautics,Beijing,100083 |
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| Abstract: | Rapidly solidified Al-4.5Cu alloy was studied with the ultrasonic inert gas atomization technique.The solidification cooling rate is 103～105℃/s.The alloy powders have a range of size distribution;the smaller the powders the higher the cooling rate,The relation be-tween cooling rate and microstructure of the alloy was investigated.It is shown that the cooling rate has a strong influence on the solidification process and solute diffusion,With the model of convection heat transfer and microstructure analysis, the critical cooling rate at which the planar solid-liquid interface is destabilized was detennined.The critical cooling rate was compared with microstructural scaling laws. |
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| Keywords: | rapid quenching(metalurgy) aluminum alloys microstructure |
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