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Ductile phase toughening and R-curve behaviour in a B4C-Al cermet

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Abstract

The R-curve behaviour of a B4C-Al cermet was studied experimentally using the indentation/strength technique. Microstructural observations clearly indicate that the dominant mechanism contributing towards increasing toughness with crack length is due to bridging of ductile Al phases. It is inferred that ductile toughening, along with toughening due to residual stresses generated upon cooling of the cermet, contribute to this toughening behaviour. Close agreement between experimental results and a simple model is also established.

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Authors and Affiliations

  1. Materials Science and Technology Division, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA

    A. K. Bhattacharya & J. J. Petrovic

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  1. A. K. Bhattacharya
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  2. J. J. Petrovic
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Bhattacharya, A.K., Petrovic, J.J. Ductile phase toughening and R-curve behaviour in a B4C-Al cermet. J Mater Sci 27, 2205–2210 (1992). https://doi.org/10.1007/BF01117938

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  • DOI: https://doi.org/10.1007/BF01117938

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