Abstract
The Oliver–Pharr method has extensively been adopted for measuring hardness and elastic modulus by indentation techniques. However, the method assumes that the contact periphery sinks in, which limits the applicability to the materials pile up. This study proposed an improved methodology to calculate the real contact area of 1045 steel with significant pile-up. The contact boundary between indenter and specimen was assumed to overlap with the top points on the residual surface profile, and the real contact depth was defined by a sum of the indentation depth at maximum load, h max, and average pile-up height, \( h_{\text{pile - up}}^{\text{ave}} \), measured from the analysis on the residual indent morphology with atomic force microscope (AFM). The mechanical properties calculated by the newly proposed method were compared with those by the Oliver–Pharr method.
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References
Navamathavan R, Kim K-K, Hwang D-K, Park S-J, Hahn J-H, Lee TG, Kim G-S (2006) Appl Surf Sci 253:464
Pelletier H, Krier J, Mille P (2006) Mech Mater 38:1182
Cavaliere P (2009) Mater Sci Eng A 512:1
Oliver WC, Pharr GM (1992) J Mater Res 7(6):1564
Doerner MF, Nix WD (1986) J Mater Res 1(4):601
Oliver WC, Pharr GM (2004) J Mater Res 19(1):3
Bolshakov A, Pharr GM (1998) J Mater Res 13(4):1049
Joslin DL, Oliver WC (1990) J Mater Res 5:123
Qian L, Li M, Zhou Z, Yang H, Shi X (2005) Surf Coat Technol 195:264
Choi LY, Lee HS, Kwon D (2004) J Mater Res 19:3307
Peng Z, Gong J, Miao H (2004) J Eur Ceram Soc 24:2193
Aguilar-Santillan J (2008) Acta Mater 56:2476
Acknowledgements
This paper was financially supported by Advanced Maintenance Research Project (9140A270304090C8501), NSFC (50875053, 50735006), Equipment Research Project and Fundamental Research Funds for the Central Universities (2009PY08).
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Zhu, Ln., Xu, Bs., Wang, Hd. et al. Measurement of mechanical properties of 1045 steel with significant pile-up by sharp indentation. J Mater Sci 46, 1083–1086 (2011). https://doi.org/10.1007/s10853-010-4876-7
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DOI: https://doi.org/10.1007/s10853-010-4876-7