The role of grain boundary sliding on creep deformation characteristics of discontinuous reinforced composites

Technical Report · Sat Oct 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10190318· OSTI ID:10190318

Biner, S B

In this study, the grain boundary sliding behavior in discontinuous reinforced composites is investigated numerically. Results indicate that the stress enhancement factor for the composite is much larger than the one observed for the matrix material. In the composite, the increase in the strain rates as a result of grain boundary sliding occurs in a wider stress range in comparison to the matrix. It is shown that the experimentally observed large scale triple point grain boundary cavitation in the composites could occur as a result of large grain rotations resulting from grain boundary sliding and evolution of triaxial stress state. Also, the observed larger creep exponent values or stress dependent creep exponent values for the composites may not be explained solely by the mechanism of grain boundary sliding.

• Research Organization: Ames Lab., IA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 10190318
• Report Number(s): IS-M--807; ON: DE95001671
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603
CAVITATION
COMPOSITE MATERIALS
CREEP
GRAIN BOUNDARIES
MECHANICAL PROPERTIES
REINFORCED MATERIALS