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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Strip Casting of Light Metals
Presentation Title Microstructure Investigations of Inverse Segregations in Twin-roll Cast AZ31 Strips
Author(s) Christina Krbetschek, Franz Berge, Matthias Oswald, Madlen Ullmann, Rudolf Kawalla
On-Site Speaker (Planned) Christina Krbetschek
Abstract Scope During twin roll casting remaining melt, enriched with alloying elements, is pressed into small cavities of rapid solidified material at the chill surface. This phenomenon is called inverse segregation and can be formed during the twin-roll casting of AZ31. Under mechanical load, inverse precipitations in AZ31 strips in annealed conditions act as crack initiator and lead to material failure below the maximum deformation limits. For determining the qualitative chemical composition of the inverse segregations, SEM investigations using the EDX analysis were carried out. In order to specify the individual phases of the precipitations, the qualitative X-ray phase analysis was applied. Potential generation mechanisms of inverse segregations during TRC, based on the present results, were discussed. Via tensile tests at room temperature, the influence of the inverse segregations on the elongation to failure A80 in heat treated AZ31 TRC sheets was proved. Magnesium sheets with and without inverse segregations were compared.
Proceedings Inclusion? Planned: A combination print-CD volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Annealing Curve of 3105 Alloy Produced by Twin Roll and Belt Casting Method
Crystallographic Texture Development of As-cast 3105 Alloy Produced by St/Cu Shell Pair
Development and Numerical Simulation of a Compound Belt Casting Process
Effect of As-cast Strip Thickness and Reduction Prior to Soft Annealing on the Formability of Twin-roll Cast 5754 Sheets
Effect of Heat Treatment on Tensile and Fatigue Properties of Al 3527K Alloy Manufactured by Twin Roll Strip Casting
Effect of Twin-Roll Casting Parameters on Mechanical and Microstructural Properties of AA5083-H321 Sheet
Liquid Metal Feeding Technology for Twin-roll Casting of Magnesium and Aluminium
Microstructure and Mechanical Properties of Ca Containing AZX310 Alloy Sheets Produced via Twin Roll Casting Technology
Microstructure Investigations of Inverse Segregations in Twin-roll Cast AZ31 Strips
Productivity Improvements in Industrial TRC by Heat Loss Analysis along the Process Chain
Q-1: Continuous Fabrication of Direct Recycling Mg Alloy Strip by Melt Conditioned Twin Roll Casting (MC-TRC) Process
Q-3: Microstructure and Properties of SiCp/Al Matrix Composite Strip Fabricating by Twin-roll Casting Process
Substitution of Rare Earth Elements in Magnesium Alloys for the Sheet Production via Twin Roll Casting
Twin-roll Casting of Carbon Fiber-reinforced and Glass Fiber-reinforced Aluminum Strips

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