Improving the formability of magnesium by cushion-ram-pulsation

The application of forming processes using lightweight magnesium alloys is known to be difficult with regard to minor formability caused by a small number of active slip systems, especially at low temperatures. However, a new approach for deep drawing at elevated temperatures considers flexible moti...

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Bibliographic Details
Main Authors: Rautenstrauch, Anja, Luft, Johannes, Birnbaum, Peter, Baumann, Markus, Ullmann, Madlen, Kräusel, Verena, Landgrebe, Dirk, Kawalla, Rudolf, Prahl, Ulrich
Format: Conference Proceeding
Language:English
Subjects:
Cushions
Deep drawing
Drawability
Formability
Forming
High temperature
Low temperature
Magnesium
Magnesium base alloys
Motion effects
Pulsation
Sheet metal
Twin roll casting
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Summary:The application of forming processes using lightweight magnesium alloys is known to be difficult with regard to minor formability caused by a small number of active slip systems, especially at low temperatures. However, a new approach for deep drawing at elevated temperatures considers flexible motion profiles of a servo-screw press. The so-called cushion-ram-pulsation (CRP) is a newly developed method of position-controlled motion. As a result, the process limitations for deep drawing are significantly extended. This study investigates the deep drawing process of AZ31 cups by variable motion profiles of cushion and ram, focusing on enhanced drawability. Therefore the initial AZ31 sheet was fabricated by twin-roll casting. Furthermore, the adjustment of the forming temperature for an improved forming process and optimized component properties are described. In addition, the results were evaluated in comparison to conventional deep drawing, and the superior technological potential will be outlined.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201819012003