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Acta Metall Sin  2010, Vol. 46 Issue (7): 814-820    DOI: 10.3724/SP.J.1037.2010.00119
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HOT DEFORMATION BEHAVIOR AND MICROSTRUCTURAL STABILITY OF SPRAY FORMED Al-22Si-5Fe ALLOY
CAI Yuanhua1), LIANG Ruiguang2), SU Zhanpei2),  ZHANG Jishan1)
1) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083
2) Agricultural Machine Management Bureau of Rencheng District, Jining 272000
Cite this article: 

CAI Yuanhua LIANG Ruiguang SU Zhanpei ZHANG Jishan. HOT DEFORMATION BEHAVIOR AND MICROSTRUCTURAL STABILITY OF SPRAY FORMED Al-22Si-5Fe ALLOY. Acta Metall Sin, 2010, 46(7): 814-820.

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Abstract  

Hot deformation behavior of spray forming Al-22Si-5Fe alloy at different deformation temperatures with isothermal constant strain rates of 0.005, 0.01, 0.03, and 0.05 s-1 was investigated by using Gleeble-1500 thermo-mechanical simulator, with maximum strain of 30%, the microstructures were studied by using of OM and XRD method. The experimental results showed that the hot deformation behavior of spray formed alloy could also be described by a model containing Z parameter (Zener-Hollomon parameter). The calculated deformation activation energy of the studied alloy was consistent with the self-diffusion activation energy of Al atoms at lower deformation temperature, and much higher than the self-diffusion activation energy of Al atoms at higher temperature because of the influences of large content hard constitutes such as prime Si and Fe-bearing intermetallics. The Si particles changed little when deformed at low temperature, but coarsened obviously when deformed at elevated temperature of 698 K or above. The heating temperature had no obvious effect on the sizes of Fe-bearing intermetallics.

Received:  10 March 2010     
Fund: 

Supported by National Basic Research Program of China (No.2006CB605204)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00119     OR     https://www.ams.org.cn/EN/Y2010/V46/I7/814

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