Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 International Journal of Applied Mechanics and Engineering

1 2010

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: AlSi9Cu3 cast alloys

Sortuj według:

Ogranicz wyniki do:

On the mechanical properties and structure of age-hardened AlSi9Cu3 cast alloy

Hurtalova L., Tillova E.

International Journal of Applied Mechanics and Engineering

2010

Vol. 15, no 2

355-362

The paper describes the influence of age-hardening by solution treatment at 515 C with holding time 4 hours, water quenching at 40 C and artificial aging at different temperature 130 C, 150 C and 170 C with different holding time 2, 4, 8, 16 and 32 hours on mechanical properties (strength tensile and Brinell hardness) and changes in the morphology of eutectic Si, Fe-rich and Cu-rich intermetallic phases in secondary (recycled) AlSi9Cu3 cast alloy. The structure with of black-white etching was observed (Dix-Keller, H2SO4). A quantitative study of changes in the morphology of eutectic Si, Cu-rich and Fe-rich phases was carried out using Image Analyzer software NIS-Elements. The analysis of intermetallic phases was performed on SEM using EDX. Mechanical properties were measured in line with STN EN ISO. Age-hardening led to changes in the microstructure including spheroidization and coarsening of eutectic silicon, gradual disintegration, shortening and thinning of Fe-rich intermetallic phases, the dissolution of precipitates and the precipitation of finer hardening phase (Al2Cu), further increase in the hardness and tensile strength in the alloy.