Document Type
Article
Publication Date
4-2025
Publisher
John Wiley & Sons, Inc
Abstract
Determining strength to hardness correlation coefficients on nano and microscale in correspondence to microstructure and composition leads the way to inexpensive, non-destructive ways to predict tensile strength of bulk materials, which is important for developing preventive maintenance procedures in a variety of industries. Nanohardness and microhardness tests were performed on an in-house prepared eutectic SnBi alloy. Elemental composition and eutectic morphology were verified by scanning electron microscopy and energy dispersive spectroscopy. The linear correlation coefficient, C1 = HIT/Hv, between nanoindentation hardness and Vickers microhardness was determined based on experimental measurements. A value of C1 > 1.25 was obtained, exceeding the expected value for polycrystalline alloys C1 = 1.25. The Tabor factor, k = Hv/σ at 8% strain, is well known to be about 3 for polycrystalline alloys. However, for the eutectic alloy, the estimated Tabor factor was consistently greater than 3. The stronger correlation in both cases suggests the presence of an unaccounted factor contributing to both C1 and k. Comparison to coefficients estimated from data available for other alloy systems is discussed.
Recommended Citation
Starostina, N., Hartman, A., Cole, R., Li, D., & Park, J. W. (2025). From Nanoindentation to Microhardness to Tensile Strength: Correlation Coefficients Estimates as a Function of Microstructure in Eutectic SnBi Alloy. Engineering Reports, 7(4), e70113. https://doi.org/10.1002/eng2.70113
Comments
Open access to this article is funded by Santa Clara University Library.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.