高压下Al基合金的凝固组织特征

孙淑华; 李杰; 徐瑞; 赵海丽; 刘日平

doi:10.11858/gywlxb.2008.04.017

高压下Al基合金的凝固组织特征

doi: 10.11858/gywlxb.2008.04.017

1.
燕山大学理学院，河北秦皇岛 066004；
2.
燕山大学材料学院亚稳材料制备技术与科学国家重点实验室，河北秦皇岛 066004

详细信息

通讯作者:
刘日平

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出版历程
- 收稿日期: 2008-03-04
- 修回日期: 2008-09-15
- 发布日期: 2008-12-05

Microstructural Characteristics in Al-Based Alloys Solidified under High Pressure

1.
College of Sciences, Yanshan University, Qinhuangdao 066004, China;
2.
State Key Laboratory of Metastable Material Science & Technology, Yanshan University, Qinhuangdao 066004, China

More Information

Corresponding author: LIU Ri-Ping

摘要

摘要: 研究了亚共晶或过共晶Al-Cu和Al-Si合金在5 GPa压力条件下凝固的显微组织特征。与常压相比，高压不仅会明显改变凝固组织形态，而且会使凝固组织尺寸发生变化，有时粗化，有时细化。凝固组织粗化还是细化与压力对液固两相区温度间隔的影响有关。当压力使液固两相区温度间隔增大时，凝固组织粗化，反之细化。此外，还提出了一种针对树枝晶和胞状晶两种不同形态组织的尺寸评价新方法。
- 粗化 /
- 高压凝固 /
- 显微组织 /
- Al基合金
Abstract: The microstructures of hypoeutectic and hyper-eutectic Al-Cu and Al-Si alloys solidified at high pressure (5 GPa) have been investigated. The results showed that high pressure has an evident influence on the morphologies and the dimensions of the solidified microstructures. This influence is directly related to the temperature interval of the liquid-solid region in the phase diagram. When the temperature interval is increased by pressure, the solidified microstructure will be coarsened. When the temperature interval is decreased by pressure, the solidified microstructure will be refined. Moreover, a new method is proposed in this paper to easily evaluate the sizes of the cellular and the dendritic microstructures.
- high pressure /
- solidification /
- coarsening /
- Al-based alloys

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参考文献(16)

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