Abstract
An experimental technique for determining the dynamic indentation hardness of materials is described. Unlike the traditional static hardness measurements, the dynamic hardness measurements can capture the inherent rate dependent material response that is germane to high strain rate deformation processes such as high speed machining and impact. The dynamic hardness of several commonly used engineering materials is found to be greater than the static hardness. The percentage increase in hardness is found to be strongly dependent on the crystal structure of the materials used in this study. Microstructural analysis of static and dynamic indentations on metals with FCC, BCC, and HCP crystal structures revealed that the indentation volume size is a function of plastic properties under static and dynamic conditions. Finite element simulations of the dynamic indentation event indicated that an increase in yield stress and work hardening rate decrease the size of the developed plastic zone beneath the indenter.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Angus, H.T., (1979) The Significance of Hardness, Wear, 54, 33–78.
ASTM, (1996) E 92-82: Standard Test Method for Vickers Hardness of Metallic Materials, 1996 Annual Book of ASTM Standards, Sec. 03, 01, ASTM, Easton, MD.
Fee, A.R., Segabache, R., and Toboiski, E.L., (1985) Hardness Testing, Metals Handbook, 8, 71–108.
Giannakopoulos, A.E., Larsson, P.-L., and Vestergaard, R., Analysis of Vickers Indentation, International Journal of Solids Structures, 31, n. 19, 2679–2708.
Koeppel, B.J. and Subhash, G. (1997) An Experimental Technique to Investigate the Dynamic Indentation Hardness of Materials, Experimental Techniques, 21, n. 3, 16–18.
Lankford, J., (1981) Mechanisms Responsible for Strain-Rate Dependent Compressive Strength in Ceramic Materials, Journal of the American Ceramic Society, 64, c-33–c-37.
Meyers, M.A., (1994) Dynamic Behavior of Materials, John Wiley & Sons, Inc., New York.
Nemat-Nasser, S., Isaacs, J.B., and Starrett, J.E., (1991) Hopkinson Techniques for Dynamic Recovery Experiments, Proceedings of the Royal Society of London A, 435, 371–391.
O’Neill, Hugh, (1967) Hardness Measurements of Metals and Alloys, Chapman & Hall, London.
Ravichandran, G. and Subhash, G., (1995) A Micromechanical Model for the High Strain Rate Behavior of Ceramics, International Journal of Solids Structures, 32, n. 17/18, 2627–2646.
Suresh, S., Nakamura, T., Yeshurun, Y., Yang, K.-H., and Duffy, J., (1990) Tensile Fracture Toughness of Ceramic Materials: effects of Dynamic Loading and Elevated Temperatures, Journal of the American Ceramic Society, 73, n. 8, 2457–2463.
Tabor, D., (1951) The Hardness of Metals, Oxford University Press, London.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1999 Kluwer Academic Publishers
About this paper
Cite this paper
Koeppel, B.J., Subhash, G. (1999). Dynamic Indentation Hardness of Metals. In: Bruhns, O.T., Stein, E. (eds) IUTAM Symposium on Micro- and Macrostructural Aspects of Thermoplasticity. Solid Mechanics and its Applications, vol 62. Springer, Dordrecht. https://doi.org/10.1007/0-306-46936-7_43
Download citation
DOI: https://doi.org/10.1007/0-306-46936-7_43
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-5265-5
Online ISBN: 978-0-306-46936-7
eBook Packages: Springer Book Archive