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Journal of Materials Science

, Volume 29, Issue 15, pp 4022–4026 | Cite as

Interfacial fracture toughness measurement using indentation

  • J. Zhang
  • J. J. Lewandowski
Papers

Abstract

Recent models have been developed for relating fracture toughness to indentation strengths for brittle monolithic materials. Thus, indentation may provide a simple and non-destructive means to measure fracture toughness. The indentation technique is further explored to evaluate the interfacial toughness in this work. When microindentations at loads ranging from 50 g to 4 kg were placed close to the interface of an aluminium/aluminum composite laminate, the interface stayed intact. In contrast, the interface of a niobium silicide/niobium laminate indented under similar conditions was found to debond, indicating a weaker interface. However, a Rockwell indenter at loads ranging from 60 to 150 kg were sufficient to debond the interfaces of two of the aluminum composite/aluminum laminates. Finally, the interfacial toughness is correlated to the indenter load and the delamination length along the interface. A power-law relationship was found between the load and the delamination length.

Keywords

Fracture Toughness Niobium Composite Laminate Recent Model Interfacial Fracture 
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 1994

Authors and Affiliations

  • J. Zhang
    • 1
  • J. J. Lewandowski
    • 1
  1. 1.Department of Materials Science and EngineeringCase Western Reserve UniversityClevelandUSA

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