Measurements of mechanical properties of α-phase in Cu–Sn alloys by using instrumented nanoindentation


Instrumented nanoindentation technique is a powerful approach for accurately measuring mechanical properties of materials in micron or even nanoscale. In this article, the effect of tin (Sn) content upon mechanical properties of the α-phase in Cu–Sn alloys was studied by using an instrumented nanoindentation. The experimental results revealed that: (i) the hardness of the α-phase exhibited a linear relationship with Sn content (C) increasing, i.e., H = 0.0757C + 0.8916, when it was less than the maximum solid solubility (15.8 wt.%), which is in good agreement with the Friedel–Mott–Suzuki theory; (ii) the variation of Young’s modulus in a narrow range of 120–130 GPa is attributed to orientation variation of the α-phase in casting Cu–Sn dendrites.

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This work was supported by the Department of Culture of Wuhan, China, and the Higher education of scientific research project Foundation of China (No. 20070486016).

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Correspondence to Chunxu Pan.

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Li, Y., He, K., Liao, C. et al. Measurements of mechanical properties of α-phase in Cu–Sn alloys by using instrumented nanoindentation. Journal of Materials Research 27, 192–196 (2012).

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