RT Journal Article
SR Electronic
A1 Dvorský, Drahomír
A1 Kawamura, Yoshihito
A1 Inoue, Shin-Ichi
A1 Kubásek, Jiří
A1 Nečas, David
A1 Heller, Luděk
A1 De Prado, Esther
A1 Duchoň, Jan
A1 Svora, Petr
A1 Čavojský, Miroslav
A1 Vojtěch, Dalibor
T1 Improving Strength and Ductility in Mg-Y-Zn alloy via Pre-deformation Prior to Extrusion
JF Manufacturing Technology Journal
YR 2025
VO 25
IS 4
SP 455
OP 459
DO 10.21062/mft.2025.059
UL https://journalmt.com/artkey/mft-202504-0014.php
AB 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.