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Strain rate dependence of mechanical behaviour and evaluation of the microstructure of tungsten monocrystals

: Chiem, C.Y.; Meyer, L.W.

Institute of Physics -IOP-, London:
Mechanical Properties of Materials at High Rates of Strain 1989. Proceedings
London, 1989 (Institute of Physics - Conference Series 102)
ISBN: 0-85498-058-X
10 pp. : Abb.,Lit.
Conference on the Mechanical Properties of Materials at High Rates of Strain <4, 1989, Oxford>
Conference Paper
Fraunhofer IFAM ()
compression; constitutive relation; deformability; fracture mechanism; high strain rate; mechanical behaviour; microstructure; monocrystal; shear failure; slip plane; strain rate; strength; tungsten; work hardening exponent

Monocrystals of tungsten were compressed in 110 direction at three loading velocities (from 10E-4 to 2 times 10E+2 1/s) to investigate the macroscopic mechanical behaviour as a function of strength, deformability and the fracture mechanism. Microstructural evaluations were made by TEM and correlated to the strain rates investigated. A description of the macroscopic and microscopic behaviour of tungsten monocrystals and its concomitant relationships between both strain and strain rate is obtained.