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Use of Spherical Instrumented Indentation to Evaluate the Tensile Properties of 3D Combined Structures

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Abstract

In this paper we propose a novel method, spherical indentation, for evaluation of the plastic properties of combined structures. Three-dimensional (3D) printed products, for example gradient metal alloys consisting of different kinds of material, contain interfaces that can act as weak points and threaten the mechanical reliability of products. Combined structures containing an interface between Cu alloy and Ag were prepared for testing. Samples were heat-treated at 100°C and 200°C for 3 h to optimize processing conditions. The indentation tensile properties of the samples were estimated by analyzing multiple loading–unloading curves obtained by use of the representative stress and strain method. A continuous increase in both yield strength and tensile strength was observed for the Cu alloy and the Cu/Ag interface after heat treatment at up to 200°C, because of precipitation hardening. These experimental results show that mechanical characterization of combined structures by spherical indentation is highly useful on the nano and micro scales.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) (2010-0029211).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Republic of Korea

    Won-Seok Song, Seung-Gyu Kim & Dongil Kwon

  2. School of Materials Science and Engineering, UNIST (Ulsan National Institute of Science and Technology), Ulsan, 689-798, Republic of Korea

    Young-Cheon Kim

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  1. Won-Seok Song
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  2. Seung-Gyu Kim
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  4. Dongil Kwon
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Correspondence to Won-Seok Song.

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Song, WS., Kim, SG., Kim, YC. et al. Use of Spherical Instrumented Indentation to Evaluate the Tensile Properties of 3D Combined Structures. J. Electron. Mater. 44, 831–835 (2015). https://doi.org/10.1007/s11664-014-3593-4

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  • DOI: https://doi.org/10.1007/s11664-014-3593-4

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