From Process to Properties: Understanding Texture and Mechanical Behavior in AM50 rods Processed by Constrained Friction Processing

Zusammenfassung

Constrained friction processing (CFP) is a new thermo-mechanical technique to produce rods from lightweight metals, like Mg or Al alloys, involving the extrusion of the material under high shear conditions induced by the rotation of the tools. This work aims to introduce CFP as an effective technique for producing AM50 rods. The results show an exceptional grain refinement by a factor of 100 relative to the base material. Furthermore, the material flow formed during the process lead to the formation of a texture gradient ultrastrong in terms of intensity, characterized by the B-fiber texture at the center of the rod, which is increasingly tilted outward as the position approaches the edge. As a result, texture-dependent deformation mechanisms are activated, resulting in particular local mechanical properties along the rod. While all samples show significant improvements in ultimate tensile strength, notable enhancements in yield strength and ductility occur at the middle and center, with an exceptional increase in elongation at break observed at the outer portion of the rod. The study demonstrates that texture tailoring can be achieved by controlling material flow during CFP, enabling an optimized balance between strength and ductility for specific applications. Furthermore, the enhanced properties indicate that this approach could pave the way for biomedical applications when combined with biocompatible Mg-based alloys, opening new avenues for material development.

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Bibliographische Angaben

Copyrightjahr: 2025
ISBN-Online: 978-3-69030-161-9
Verlag: TEWISS, Garbsen
Reihe: Schriftenreihe des Instituts für Produktionstechnik und -systeme
Band: 08/2025
Sprache: Deutsch
Seiten: 120
Produkttyp: Monographie

Inhaltsverzeichnis

KapitelSeiten

Titelei/Inhaltsverzeichnis Kein Zugriff Seiten i - xx
1. 1.1 Motivation and research gap Kein Zugriff
2. 1.2 Objectives and approach Kein Zugriff
3. 1.3 Thesis structure Kein Zugriff
1. 2.1 Structure and properties of Mg Kein Zugriff
2. 2.2 Mg alloys Kein Zugriff
3. 2.3 Themo-mechanical processing of Mg alloys Kein Zugriff
1. 3.1 Processing of rods Kein Zugriff
2. 3.2 Design of Experiments Kein Zugriff
3. 3.3 Microstructural and phase characterization Kein Zugriff
4. 3.4 Material flow visualization using tracer material Kein Zugriff
5. 3.5 Mechanical characterization Kein Zugriff
1. 4.1 The constrained friction processing Kein Zugriff
2. 4.2 Process characteristics Kein Zugriff
3. 4.3 Effect of CFP on grain refinement Kein Zugriff
4. 4.4 Summary and conclusions Kein Zugriff
1. 5.1 Characterization of the base materials Kein Zugriff
2. 5.2 Grain structure of a refined rod Kein Zugriff
3. 5.3 Local texture and material flow Kein Zugriff
4. 5.4 Changes in particles induced by the CFP Kein Zugriff
5. 5.5 Summary and conclusions Kein Zugriff
1. 6.1 Local mechanical behavior of CFP-processed rods Kein Zugriff
2. 6.2 Deformation mechanisms of AM50 ultrastrong textures Kein Zugriff
3. 6.3 Summary and conclusions Kein Zugriff
Chapter 7 Conclusion and Outlook Kein Zugriff Seiten 91 - 92
Bibliography Kein Zugriff Seiten 93 - 108
Appendix A Kein Zugriff Seiten 109 - 110
Appendix B Kein Zugriff Seiten 111 - 112
Appendix C Kein Zugriff Seiten 113 - 120