ULTRASONIC STUDY ON STRAIN RATE SENSITIVITY OF FLOW STRESS IN ALUMINIUM AT STRAIN RATES AROUND 10000/s J. SHIOIRI, H. IMAIZUMI and T. MURAMATSU J. Phys. IV France, 01 C3 (1991) C3-177-C3-183 DOI: 10.1051/jp4:1991323