Bimodal microstructure evolution and strength-ductility co-enhancement of hot-extruded Al–La–Mg–Mn alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 859; p. 144195
• Main Authors: Zhang, Xinkui, Li, Liejun, Wang, Zhi, Chen, Songjun, Peng, Hanlin, Gao, Jixiang, Peng, Zhengwu
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 24.11.2022; Elsevier BV
• Subjects: Al-La-Mg-Mn alloy; Alloying; Aluminum base alloys; Bimodal microstructure; Ductility; Elongation; Heat resistant alloys; Hot extrusion; Intermetallic compounds; Load transfer; Magnesium; Manganese base alloys; Mechanical properties; Microcracks; Microstructure; Pre-existing microcracks; Strain hardening; Strong strain-hardening ability; Ultimate tensile strength; Mechanical properties; Strong strain-hardening ability; Pre-existing microcracks; Bimodal microstructure; Al-La-Mg-Mn alloy

Novel heat-resistant Al-(La, Ce) alloys are strengthened via alloying with high Mg; however, their ductility deteriorates due to the formation of coarse intermetallics. In this work, a conventional hot extrusion process was used to refine the microstructures of Al–La alloy with a high Mg addition. B...