J. Phys. IV France 07 (1997) C3-409-C3-414
Dynamic Tensile Behavior of 93wt.% Tungsten Alloy and its Fractal Features of FractureB.-P. Zhang1, C. Ding1, B. Liu1, T. Jiao1, H. Lin1 and S.-H. Zhou2
1 Department of Mechanics and Engineering, Beijing Institute of Technology, P.O. Box 327, 100081 Beijing, P.R. China
2 Beijing Center of Physico-Chemical Detection and Analysis, 100081 Beijing, P.R. China
The experimental dynamic tensile stress-strain curves and the relation of the critical strain ε, of plastic instability and the plastic work Wi at the maximum load-onset of instability are provided for 93wt.% tungsten alloy, and a modified constitutive equation was constructed which can represent excellently the strain-hardening, strain rate-hardening and the thermal softening effects of the alloy. Except that, the fractal analysis to the tensile fractures was made which gives a strong support to the conclusions obtained from the macro-experimental results.
© EDP Sciences 1997