Modifying Al-7Si-0.35Mg alloys using equal channel angular extrusion

Cheng Yu Chou, Kuan Wen Wang, Sheng Long Lee, Tzu Shun Yang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The 356 alloys which are different in the composition of Sr and Fe elements were heavily deformed by equal channel angular extrusion. The large acicular silicon in the unmodified alloy and the Fe-bearing phases act as crack initiators and provide easy paths for fracture. After extruded for 5 passes, the acicular silicon and Fe-bearing phases are obviously refined and rounded, both of which resulted in the higher values of mechanical properties. The elongation is greatly enhanced because the cracks have less opportunity to grow continuously along the boundaries of refined phases. The tensile strengths are also enhanced due to the recrystallized and finer grains.

Original languageEnglish
Pages (from-to)2469-2472
Number of pages4
JournalMaterials Letters
Issue number16
StatePublished - 15 Jun 2008


  • Equal channel angular extrusion
  • Mechanical properties
  • Metals and alloys


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