The optimal solution treatment condition in a Al-Si-Cu AC2B alloy

Jae Gil Jung, June Soo Park, Yang Soo Ha, Young Kook Lee, Joong Hwan Jun, Hee Sam Kang, Jong Dae Lim

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5 Citations (Scopus)


The precipitates, hardness, and tensile properties of Al-6.2Si-2.9Cu AC2B alloy were investigated with respect to solution treatment time at 500°C. Al(Cu)-Al2Cu eutectic, Si, 0-(Al2Cu), and Q-(Al5Cu 2Mg8Si6) phases were observed in the as-cast specimen. With increasing the solution treatment time at 500°C, the Al(Cu)-Al2Cu eutectic and θ-(Al2Cu) phases were gradually reduced and finally almost disappeared in 5 h. The mechanical properties, such as hardness, tensile strength, and elongation, were improved with solution treatment time until about 5 h due to the dissolution of the Al2Cu particles. With further holding time, the mechanical properties did not change much. The solution treated specimens for over 5 h at 500°C exhibit almost the same tensile properties even after aging at 250°C for 3.5 h. Accordingly, the optimal solution treatment condition of the Al-Si-Cu AC2B alloy is considered to be 5 h at 500°C.

Original languageEnglish
Pages (from-to)223-227
Number of pages5
JournalJournal of Korean Institute of Metals and Materials
Issue number4
Publication statusPublished - 2009 Apr

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys


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