Investigation of coordination mechanism in superplastic deformation of SiCw/LD2Al composite

被引：0
|
作者：
Geng, Lin [1 ]
Wang, Gui-Song [1 ]
Meng, Qing-Chang [1 ]
Wang, De-Zun [1 ]
Yao, Zhong-Kai [1 ]
Lei, Ting-Quan [1 ]
机构：
[1] Sch. of Mat. Sci. and Eng., Harbin Inst. of Technol., Harbin 150001, China
来源：
Cailiao Kexue yu Gongyi/Material Science and Technology | 2002年 / 9卷 / 03期
关键词：
Aluminum - Liquid phase epitaxy - Plastic deformation - Silicon carbide - Stress analysis;
D O I：
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中图分类号：
学科分类号：
摘要：
The local stress at the interface is analyzed to find out the role of the liquid phase in the superplasticity for metal matrix composites. When the local stress caused by sliding along the interface is higher than that applied on to the interface, the maximum superplastic deformability is obtained in the material containing a liquid phase. On the contrary, the deformability is maximum in a fully solid state. Therefore, it is suggested that when the stress concentration is caused, a liquid phase is needed in order to relax the stress concentration. However, when no stress concentrations are caused, a liquid phase is not needed for the superplasticity. This theory is in good agreement with the experiment results.
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页码：225 / 228
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