Manufacturing Technology 2025, 25(4):455-459 | DOI: 10.21062/mft.2025.059

Improving Strength and Ductility in Mg–Y–Zn alloy via Pre-deformation Prior to Extrusion

Drahomír Dvorský ORCID...1,3, Yoshihito Kawamura ORCID...2, Shin-Ichi Inoue ORCID...2, Jiří Kubásek ORCID...3, David Nečas ORCID...3, Luděk Heller ORCID...1, Esther De Prado ORCID...1, Jan Duchoň ORCID...1, Petr Svora ORCID...1, Miroslav Čavojský ORCID...4, Dalibor Vojtěch ORCID...3
1 Institute of Physics, Czech Academy of Science, Prague, Na Slovance 1999/2 182 21 Praha 8, Czech Republic
2 Magnesium Research Center, Kumamoto University, Kumamoto, 2-39-1 Kurokami Chuo-ku Kumamoto, 860-8555 Japan
3 Department of Metals and Corrosion Engineering, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5 166 28 Praha 6 – Dejvice, Czech Republic
4 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Dúbravská cesta 9/6319 845 13, Bratislava, Slovak Republic

The Mg-Y-Zn alloy system is well known for its outstanding combination of high strength and ductility, even at relatively low concentrations of alloying elements. This exceptional performance is primarily at-tributed to its characteristic microstructure, which features Long-Period Stacking Ordered (LPSO) phas-es and the distinctive Mille-Feuille Structure (MFS). Kink-induced strengthening, developed during thermomechanical processing, has emerged as a promising strategy to simultaneously enhance strength and ductility. In this study, the beneficial effect of pre-deformation aimed at introducing additional kinks into the microstructure prior to extrusion is demonstrated. The subsequent extrusion process promotes dynamic recrystallization (DRX), generating fine DRX grains while preserving kink structures in the non-DRX regions. As a result, the yield strength is enhanced by approximately 80 MPa, accom-panied by a slight improvement in ductility.

Keywords: Magnesium, LPSO, Kinking, Mechanical properties, Extrusion
Grants and funding:

This research was supported by Japan Society for the Promotion of Science (KAKENHI Grant-in-Aid for Scientific Research; 18H05475, 18H05476 and JP20H00312) and MRC International Collaborative Research Grant.
The authors would like to thank the Czech Science Foundation (Project No. 22-22248S) and specific university research (A1_FCHT_2025_011) for financial support
The authors acknowledge the assistance provided by the Ferroic Multifunctionalities project, supported by the Ministry of Education, Youth, and Sports of the Czech Republic. Project No. CZ.02.01.01/00/22_008/0004591, co-funded by the European Union
CzechNanoLab project LM2023051 funded by MEYS CR is gratefully acknowledged for the financial support of the measurements/sample fabrication at LNSM Research Infrastructure Miroslav Čavojský would like to thank Vega 1/0531/22 for financial support

Received: June 28, 2025; Revised: September 9, 2025; Accepted: October 16, 2025; Prepublished online: November 10, 2025; Published: November 11, 2025  Show citation

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Dvorský D, Kawamura Y, Inoue S, Kubásek J, Nečas D, Heller L, et al.. Improving Strength and Ductility in Mg–Y–Zn alloy via Pre-deformation Prior to Extrusion. Manufacturing Technology. 2025;25(4):455-459. doi: 10.21062/mft.2025.059.
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