publication . Article . 2011

Microstructural evolution of direct chill cast Al-15.5Si-4Cu-1Mg-1Ni-0.5Cr alloy during solution treatment

He Kezhun; Yu Fuxiao; Zhao Dazhi;
Open Access English
  • Published: 01 Aug 2011 Journal: China Foundry (issn: 1672-6421, Copyright policy)
  • Publisher: Foundry Journal Agency
Heat treatment has important influence on the microstructure and mechanical properties of Al-Si alloys. The most common used heat treatment method for these alloys is solution treatment followed by age-hardening. This paper investigates the microstructural evolution of a direct chill (DC) cast Al-15.5Si-4Cu-1Mg-1Ni-0.5Cr alloy after solution treated at 500, 510, 520 and 530℃, respectively for different times. The major phases observed in the as-cast alloy are α-aluminum dendrite, primary Si particle, eutectic Si, Al7Cu4Ni, Al5Cu2Mg8Si6, Al15(Cr, Fe, Ni, Cu)4Si2 and Al2Cu. The Al2Cu phase dissolves completely after being solution treated for 2 h at 500℃, while th...
free text keywords: Al-Si alloy, solution treatment, microstructure, intermetallic compound, Technology, T, Manufactures, TS1-2301
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Article . 2011
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