Reduction of plastic anisotropy and improved formability of novel magnesium alloy sheets through utilization of Equal-Channel Angular Pressing (ECAP)
Final Report Abstract
In this project, the effect of different processing routes on the microstructure-texture and related deformation and forming behavior of an Mg-Zn-Nd-Y-Zr alloy was investigated. Special emphasis was placed on the thermomechanical processing, related characterization (microstructural and mechanical of processed samples) and understanding of involved deformation mechanisms (via crystal plasticity (CP) modelling approaches). To reach this goal, the use of Equal-Channel Angular Pressing (ECAP) to deform Mg sheets was the starting point. This technique was selected as the introduction of severe shear deformation allows to tailor the crystallographic texture for a specific deformation behavior. Samples processed via ECAP have shown an improvement in the uniaxial deformation behavior with well-balanced work hardening, good ductility, reduce planar yield asymmetry. Despite these improvements, it was found that the forming behavior under deep drawing state can be worse in comparison to other thermomechanical processing approaches. In the frame of this project, the effect of cold rolling on the texture design of this type of alloy was systematically investigated. It was found that a basal texture can in principle reduce the earing behavior during deep drawing of this alloy type. Accordingly, an understanding of the meaning of the normal and planar anisotropy (related with different conditions of this alloy) is provided. Furthermore, through CP simulation, it was possible to provide a deep understanding of the influence of the activation of different deformation mechanisms. In the last stages of the project, also the effect of recovery has been implemented to this type of analysis.
Link to the final report
https://mediatum.ub.tum.de/1774299
Publications
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Effect of ECAP Process on the Activation of Deformation Mechanisms During Subsequent Uniaxial Tension of Mg-ZEWK2000 Sheets. Lecture Notes in Mechanical Engineering, 744-753. Springer Nature Switzerland.
Victoria-Hernandez, José; Cano-Castillo, Guadalupe; Böhm, Viktor; Gruber, Maximilian; Volk, Wolfram; Ben, Khalifa Noomane & Letzig, Dietmar
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Influence of Equal-Channel Angular Pressing on the Microstructure and Texture of Mg-Zn-Y-Zr-RE Alloy Sheets. Lecture Notes in Mechanical Engineering, 456-466. Springer Nature Switzerland.
Böhm, Viktor; Gruber, Maximilian; Abele, Elias; Steinbauer, Cordula; Victoria-Hernández, José; Letzig, Dietmar; Ben, Khalifa Noomane & Volk, Wolfram
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Dissertation: (2024), Equal-Channel Angular Pressing für industriell anwendbare Aluminiumblechwerkstoffe, ISBN: 978-3-911206-01-3
Maximilian Gruber
