Summary
An experimental technique has been developed for investigating behaviour of materials at high strain rates and cryogenic temperature using a split Hopkinson bar system and a liquid helium cryostat. Yield stress and fracture toughness for a mild steel (JIS-S25C) and an aluminum alloy (Al 7075-T651) were measured at strain rates (loading rates) up to 3×103 s−1 (3×106MPa√m/s) and temperatures down to 4.6K. For the mild steel, the dynamic and static yield stresses increased with decreasing temperature and the dynamic yield stress was fairly larger than the static one. The variation of the dynamic yield stress due to temperature was not seen below 77K. The fracture toughness was dropped with decreasing temperature and increasing loading rate. The brittle-to-ductile transition was shifted to higher temperature range by the increase of loading rate. For the aluminum alloy, the yield stress scarcely depended on the temperature. The influences of temperature and loading rate on the fracture toughness were not clearly seen for Al 7075-T651.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Malvern, L.E.: Experimental and theoretical approaches to characterisation of material behaviour at high rates of deformation; Harding, J. (ed.) Proc. Mech. Prop. High Rates Strain. London: Inst. Phys. Conf. Ser. (1984) 1–20.
Dorn. J.E.: Low-temperature dislocation mechanisms. Rosenfield, A.R.; Hahn, G.T.; Bement, Jr A.L.; Jaffee, R.I. (eds.) Dislocation dynamics. New York: McGraw Hill (1968) 27–55.
Rice, J.R.; Thomson, R.: Ductile versus brittle behaviour of crystals. Phil. Mag. 29 (1974) 73–97.
John, C.St.: The brittle-to-ductile transition in pre-cleaved silicon single crystals. Phil. Mag. 32 (1975) 1193–1212.
Dai, Shu-Ho; Li, J.C.M.: Dislocation-free zone at the crack tip. Scripta Met. 16 (1982) 183–188.
Majumdar, B.S.; Burns, S.J.: A Griffith crack shielded by a dislocation pile-up. Int. J. Fracture 21 (1983) 229–240.
Kishida, K.; Yokoyama, T.; Nakano, M.: Measurement of dynamic fracture toughness based on the split Hopkinson bar technique; Harding, J. (ed.) Proc. Mech. Prop. High Rates Strain. London: Inst. Phys. Conf. Ser. (1984) 221–228.
Lindholm, U.S.; Yeakley, L.M.: High strain-rate testing: tension and compression. Exper. Mech. 8 (1968) 1–9.
Campbell, S.J.; Herbert I.R.: Continuous flow cooling units and helium cryostats — a comparison. Cryogenics 19 (1979) 611–615.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1987 Springer-Verlag, Berlin, Heidelberg
About this chapter
Cite this chapter
Kishida, K., Kataoka, T., Yokoyama, T., Nakano, M. (1987). Behaviour of Materials at High Strain Rates and Cryogenic Temperature. In: Kawata, K., Shioiri, J. (eds) Macro- and Micro-Mechanics of High Velocity Deformation and Fracture. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82767-9_6
Download citation
DOI: https://doi.org/10.1007/978-3-642-82767-9_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-82769-3
Online ISBN: 978-3-642-82767-9
eBook Packages: Springer Book Archive