Relation between mechanical properties and microstructure of cast aluminum alloy AlSi9Cu3
Tóm tắt
One common material for engine applications is the AlSi9Cu3 alloy. This alloy has a good castability, excellent machinability, medium strength, and low specific weight. The study was focused on the investigation of the effect of the solution heat treatment on the microstructure and mechanical properties of the alloy (strength-Rm, hardness-HBS). The temperatures of the solution heat treatment were 505°C, 515°C, and 525°C ± 5°C and the solution time ranged from 0 to 32 h (0, 2, 4, 8, 16, and 32 h). Alloy AlSi9Cu3 contained α-matrix, eutectic silicon, and other Fe-and Cu-rich phases with different morphology (needle-like, Chinese script, skeleton-like, blocky, etc.). The results obtained revealed the relation between the mechanical properties and the morphologies of the eutectic silicon and the predominant copper-rich phase Al-Al2Cu-Si during the solution treatment.
Tài liệu tham khảo
J. Högerl, “Beeinflussung der Gefügemorphologie und der mechanischen Eigenschaften von AlSi7Mg-Legierungen,” in: Fortschritt-Berichte VDI, Reihe 5, No. 457, VDI Verlag, Düsseldorf (1996).
C. Kammer, Aluminium-Taschenbuch, Band 1: Grundlagen und Werkstoffe, Auflage 15, Aluminium Verlag, Düsseldorf, (1995).
M. Kiš and P. Skočovský, “Structure analysis of Sr modified AlSi10MgMn alloy,” in: Metody Oceny Struktury Oraz Wlasnosci Materialow i Wyrobów, Ustron-Jaszowiec, Wyd. Pol. Opolskiej, Poland (2005), pp. 89–94.
E. Tillová, M. Panušková, and M. Chalupová, “Influence of the solution treatment on the structure and properties of cast AlSi9Cu3 alloys,” in: Fraktography’06, Stará Lesná (2006), pp. 493–496.
E. Tillová, M. Panušková, and M. Chalupová, “Metallograpische Analyse von Al-Si-Cu Gusslegierungen,” Berichte und Informationen, 2/2006, 14, Dresden, SRN (2006), pp. 49–55.
C. T. Rios and R. Caram, “Intermetallic compounds in the Al-Si-Cu system,” Acta Mikroskopica, 12, No. 1, 77–81 (2003).