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EFFECT OF INITIAL MICROSTRUCTURE ON HOT FORGING OF MG ALLOYS

Author:
KWON, Y.   LEE, Y.   KIM, S.   LEE, J.  


Journal:
International Journal of Modern Physics B


Issue Date:
2008


Abstract(summary):

Magnesium alloys still have a lot of technical challenges to be solved for more applications. There have been many research activities to enhance formability of magnesium alloys. One is to design new alloy composition having better formability. Also, low formability of wrought alloys can be improved by optimizing the processing variables. In the present study, effect of process variables such as forging temperature and forging speed were investigated to forgeability of three different magnesium alloys such as AZ31, AZ61 and ZK60. To understand the effect of process variables more specifically, both numerical and experimental works have been carried out on the model which contains both upsetting and extrusion geometries. Forgeability of magnesium alloys was found to depend more on the forging speed rather than temperature. Forged sample showed a significant activity of twinning, which was found to be closely related with flow uniformity.


Page:
6064-6069


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