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Indentation Size Effect and Microhardness Study of β-Sn Single Crystals |
| O. SAHIN1;O. UZUN2; U. KOLEMEN2;B. DUZGUN3; N. UCAR1 |
| 1Department of Physics, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey
2Department of Physics, Art and Science Faculty, Gaziosmanpasa University, Tokat, Turkey
3Department of Physics, K. K. Education Faculty, Ataturk University, Erzurum, Turkey |
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| Cite this article: |
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O. SAHIN, O. UZUN, U. KOLEMEN et al 2005 Chin. Phys. Lett. 22 3137-3140 |
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Abstract The load dependence of apparent microhardness of β-Sn single crystals having different growth directions is investigated. The measurements are performed on (110) planes of these crystals in the load range from 10 to 50mN. It is found that the degree of the microhardness anisotropy decreases for higher indentation test loads. The examined materials exhibit the behaviour of indentation size effect (ISE), i.e., the apparent hardness increases with decreasing indentation load. Neither Meyer’s law nor the proportional specimen resistance (PSR) model can fully explain the nonlinear variation of microhardness with load. Instead, preference is given to modified the PSR model based on the consideration of the effect of machining-induced residually stressed surface on the hardness measurement.
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| Keywords:
62.20.Qp
62.20.-x
62.20.Fe
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Published: 01 December 2005
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