Reasons and Prevention Measures of Crack at the Bottom of the Extruded Magnesium Alloy Tube

Mu Meng; Zhi Min Zhang; Yong Biao Yang

doi:10.4028/www.scientific.net/AMR.217-218.1625

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Reasons and Prevention Measures of Crack at the Bottom of the Extruded Magnesium Alloy Tube

Abstract:

Microstructure observation by optical microscope and numerical simulation by MSC software were performed to study the reason of ring crack at the bottom of the extruded magnesium alloy tube. On this basis, the effective protective measures were proposed by numerical simulation analysis. The result shows that: there is a significant difference between the direction of backward extrusion metal flow and the direction of the original metal flow direction. Therefore, the plastic deformation is difficult, and then the crack initiates owing to severe stress concentration. Through simulation analysis, it is found that both increasing the bottom thickness and changing the bottom position could effectively prevent the crack.

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Periodical:

Advanced Materials Research (Volumes 217-218)

Pages:

1625-1628

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.217-218.1625

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Online since:

March 2011

Authors:

Mu Meng, Zhi Min Zhang, Yong Biao Yang

Keywords:

Extruded Tube, Magnesium Alloy, Parameter Optimization, Ring Crack

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