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Journal of Materials Science

, Volume 30, Issue 3, pp 568–572 | Cite as

Relevance of the use of the quality index concept in cast SiCP-reinforced Al-Si-Mg composites

  • A. M. Samuel
  • F. H. Samuel
Papers

Abstract

The quality index, Q, defined as Q=UTS + klogE1 was introduced as a means to better interpret tensile test data. However, its use in the case of composite materials is often questioned. The difficulty arises from the fact that the elongations obtained are usually close to, or less than, unity. Based on a heat-treatment study of cast Al-Si-Mg/SiCp composites (359/SiCp) and an analysis of the tensile properties obtained, it is shown that the concept of quality index, as it is commonly applied, is inappropriate in describing the combined effects of UTS and E1, and it is much better, instead, to use the probable yield strength (PYS) for such materials. Respective expressions for Q and PYS have been obtained for the 359, 359/SiC/10p and 359/SiC/20p alloys studied.

Keywords

Polymer Yield Strength Composite Material Combine Effect Test Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • A. M. Samuel
    • 1
  • F. H. Samuel
    • 1
  1. 1.Département des Sciences appliquéesUniversité du Québec à ChicoutimiChicoutimiCanada

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