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Acta Metall Sin  2008, Vol. 44 Issue (1): 55-58     DOI:
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INFLUENCE OF CYCLIC EXTRUSION AND COMPRESSION ON THE MECHANICAL PROPERTIES OF ZK60 ALLOY
LIN Jin-bao;Wang Qudong;Peng Liming;Chen Yongjun
上海交通大学轻合金精密成型国家工程研究中心
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LIN Jin-bao; Wang Qudong; Peng Liming; Chen Yongjun. INFLUENCE OF CYCLIC EXTRUSION AND COMPRESSION ON THE MECHANICAL PROPERTIES OF ZK60 ALLOY. Acta Metall Sin, 2008, 44(1): 55-58 .

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Abstract  Effects of cyclic extrusion and compression (CEC) deformation on the microstructure, texture and mechanical properties of ZK60 Mg alloy were investigated. The strengthening mechanism of CECed ZK60 Mg alloy was discussed in detail. Results shown, after subjected to CEC deformation 8 passes at 350℃, the microstructure of ZK60 alloy is dramatically refined and uniformed, the average grain size is decreased from ~20µm to ~1.5µm, the initial fiber texture is vanished and revealed a {10-13}<30-32>+{10-11}<15-43> texture. With the microstructure refining and texture changing, the compression yield stress of ZK60 alloy increased dramatically and the tension yield stress decreased slightly. As a result, the strength-differential effect (SDE) of ZK60 alloy is eliminated. At the same time, the ductility of ZK60 alloy is enhanced, especially under compression, the elongation is increased up to 38% from 15%.
Key words:  ZK60      magnesium alloy      cyclic extrusion compression(CEC)      texture      mechanical properties      
Received:  17 May 2007     
ZTFLH:  TG146.2  

URL: 

https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2008/V44/I1/55

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