细晶5083铝合金高温变形过程中的液相行为The liquid phase behavior during elevated temperature deformation of the fine-grained 5083 Al alloy

J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 673-676.

细晶5083铝合金高温变形过程中的液相行为The liquid phase behavior during elevated temperature deformation of the fine-grained 5083 Al alloy

闫洪华¹;张凯锋²

1. 哈尔滨工业大学材料科学与工程学院
2. Harbin Institute of Technology

收稿日期:2008-10-06 修回日期:2009-01-19 出版日期:2009-09-28 发布日期:2009-10-10
通讯作者: 闫洪华

Liquid Phase Behavior during Elevated Temperature Deformation of the Fine-Grained 5083 Al Alloy

Honghua Yan, Kaifeng Zhang

Received:2008-10-06 Revised:2009-01-19 Online:2009-09-28 Published:2009-10-10

摘要/Abstract

摘要：

采用热机械处理法获得了细晶5083铝合金，研究了其在380-570℃和4.17×10-4-1.0×10-2 s-1应变率范围内拉伸时的液相行为。在550℃ 和4.17×10-4 s-1应变率条件下，获得了最大的延长率530%。通过扫描电镜观察的断口分析表明由液相形成的丝状形貌与拉伸温度和应变率有关。研究结果显示在合金高温变形过程中，形成良好丝状形貌的最佳温度和应变率分别为550℃和4.17×10-4 s-1。同时，进一步讨论了液相对细晶5083合金超塑变形的影响。

关键词: 热机械处理;细晶5083铝合金;液相;超塑性

Abstract:

The liquid phase behavior of the fine-grained 5083 Al alloy obtained through thermomechanical process was investigated during the tensile tests in a temperature range of 380−570°C and strain rate range of 4.17×10^-4−1.0Χ10^-2 s^-1. The maximum elongation 530% of the fine-grained 5083 Al alloy was obtained at 550°C and 4.17×10^-4 s^-1. Fracture analysis by scanning electron microscopy (SEM) indicated that the formation of filament (formed by liquid phase) was greatly affected by the tensile temperature and strain rate. The results also showed that the optimum morphology of formed filament was obtained at 550°C and a strain rate of 4.17×10^-4 s^-1. The effect of liquid phase on superplastic deformation of the alloy was further discussed.

Key words: Thermomechanical process, Fine-graied 5083 Al alloy, Liquid phase, Superplasticity

闫洪华张凯锋. 细晶5083铝合金高温变形过程中的液相行为The liquid phase behavior during elevated temperature deformation of the fine-grained 5083 Al alloy[J]. J. Mater. Sci. Technol., 2009, 25(05): 673-676.

Honghua Yan,Kaifeng Zhang. Liquid Phase Behavior during Elevated Temperature Deformation of the Fine-Grained 5083 Al Alloy[J]. J Mater Sci Technol, 2009, 25(05): 673-676.

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