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Nanoindentation measurement of hardness and modulus anisotropy in Ni3Al single crystals

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Abstract

Hardness and elastic modulus of (111), (110), and (001) oriented Ni3Al single crystals were determined by nanoindenter measurements. Obvious elastic modulus anisotropy and hardness anisotropy were observed. The modulus for (001) was about 17% smaller than that for (111), (110). The hardness was found to be strongly dependent on the indentation size and exhibited a small anisotropy at low indentation loads. When the indentation load was increased further, the hardness anisotropy became apparent. The hardness for (111) was observed to be higher compared to (001). The indentation hardness size effect was examined by using strain gradient plasticity theory.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China

    W. Wang & K. Lu

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  1. W. Wang
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  2. K. Lu
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Correspondence to K. Lu.

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Wang, W., Lu, K. Nanoindentation measurement of hardness and modulus anisotropy in Ni3Al single crystals. Journal of Materials Research 17, 2314–2320 (2002). https://doi.org/10.1557/JMR.2002.0339

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  • DOI: https://doi.org/10.1557/JMR.2002.0339

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