QUALITY INDICES FOR CAST ALUMINUM ALLOYS

摘要

Several indices are available in the literature to assess the structural quality of cast Al alloys, especially Al-7%Si-Mg alloys, based on tensile test results. Some of these indices, most notably the one developed by Drouzy et alia provide a number that do not necessarily have a physical meaning, while the others are a measure of what fraction of the expected tensile property is achieved. These indices are discussed and the concept of maximum potential ductility is introduced. A new quality index that uses this maximum ductility potential concept is introduced for Al-7%Si-Mg as well as two Al-Cu alloys.