@ARTICLE{Lee_Junho_Effect_2024, author={Lee, Junho and Seo, Namhyuk and Lee, Sang-Hwa and Euh, Kwangjun and Kang, Singon and Son, Seung Bae and Lee, Seok-Jae and Jung, Jae-Gil}, volume={vol. 69}, number={No 1}, journal={Archives of Metallurgy and Materials}, pages={145-149}, howpublished={online}, year={2024}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, abstract={This study investigated the effect of adding Al–5Ti–1B grain refiner on the solidification microstructure and hot deformation behavior of direct-chill (DC) cast Al–Zn–Mg–Cu alloys. The grain refiner significantly decreased the grain size and modified the morphology. Fine-grained (FG) alloys with grain refiners exhibit coarse secondary phases with a reduced number density compared to coarse-grained (CG) alloys without grain refiners. Dynamic recrystallization (DRX) was enhanced at higher compression temperatures and lower strain rates in the CG and FG alloys. Both particle stimulated nucleation (PSN) and continuous dynamic recrystallization (CDRX) are enhanced in the FG alloys, resulting in decreased peak stress values (indicating DRX onset) at 450°C. The peak stress of the FG alloys was higher at 300-400°C than that of the CG alloys because of grain refinement hardening over softening by enhanced DRX.}, type={Article}, title={Effect of Al–5Ti–1B Addition on Solidification Microstructure and Hot Deformation Behavior of DC-Cast Al–Zn–Mg–Cu Alloy}, URL={http://journals.pan.pl/Content/130931/PDF-MASTER/AMM-2024-1-29-Jae-Gil%20Jung.pdf}, doi={10.24425/amm.2024.147803}, keywords={Al–Zn–Mg–Cu alloy, Microstructure, Twinned dendrite, Hot deformation, Dynamic recrystallization}, }