Study on New Extrusion Route of Equal Channel Angular Processing in High Purity Aluminium

Chun Yan Ban; Zhen Yao; Hai Tao Gao; Si Xu Zhu; Ya Ping Guo; Jian Zhong Cui

doi:10.4028/www.scientific.net/AMR.1094.343

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1094Study on New Extrusion Route of Equal Channel...

Study on New Extrusion Route of Equal Channel Angular Processing in High Purity Aluminium

Abstract:

The new extrusion route of ECAP which is called route 135 was put forward in this paper. The grain refinement of the traditional extrusion route B_C and the new route of ECAP process in 99.9995% (5N5) high purity aluminum was compared using a die with a channel-intersection angle 90°. It was found through experiment that, the grain was very coarse in the cast ingot of 5N5 high purity aluminum, and the average grain size is about 60mm. High purity aluminum processed by one pass ECAP was refined notably, and average grain size is about 1000 μm. After two ECAP passes, the average grain size is 200μm with route B_C, while it is less than 50μm with route 135. The refinement of two passes of route 135 is equivalent to the refinement of eight passes of route B_C. It indicates that the route 135 is more effective than route B_C. TEM micrograph of 5N5 high purity Al with different ECAP pass under route B_C and route 135 was studied.

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Periodical:

Advanced Materials Research (Volume 1094)

Pages:

343-347

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1094.343

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Online since:

March 2015

Authors:

Chun Yan Ban*, Zhen Yao, Hai Tao Gao, Si Xu Zhu, Ya Ping Guo, Jian Zhong Cui

Keywords:

ECAP, Grain Refinement, High Purity Aluminium, New Extrusion Route

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