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The grain size dependence of fracture toughness in an Al-6.0% Zn-2.5% Mg alloy

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Abstract

The grain size dependence of the fracture toughness (K IC) of an aged Al-6.0% Zn-2.5% Mg alloy was studied experimentally. K IC depended strongly upon grain size (L G) in two ways. In the small grain size region K IC decreased with increasing average grain size. In contrast, K IC increased with increasing average grain size for large grain sizes. The increase in K IC with increasing grain size arose as a result of the presence of abnormally large grains compared to the average grain size in the large-grained specimens.

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Authors and Affiliations

  1. The Research Institute for Iron, Steel and Other Metals, Tohoku University, 980, Sendai, Japan

    Takeshi Kawabata & Osamu Izumi

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  1. Takeshi Kawabata
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  2. Osamu Izumi
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Kawabata, T., Izumi, O. The grain size dependence of fracture toughness in an Al-6.0% Zn-2.5% Mg alloy. J Mater Sci 13, 945–950 (1978). https://doi.org/10.1007/BF00544689

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  • DOI: https://doi.org/10.1007/BF00544689

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