日本金属学会誌

J. Japan Inst. Metals, Vol. 48, No. 3 (1984),
pp. 302-307

A Testing Apparatus for Materials Deformed under High Hydrostatic Pressure and with High Deformation Speed

Masanobu Ohmori1, Misao Itoh1, Fusahito Yoshida1 and Michimasa Inoue2

1Faculty of Engineering, Hiroshima University, Higashi-Hiroshima
2Graduate Student, Hiroshima University, Higashi-Hiroshima

Abstract:

The present paper describes a testing apparatus in which some deformations such as tension and blanking can be given to metals at ambient temperature under hydrostatic pressure up to 700 MPa and with deformation speed up to 1 m•s-1.
Using this apparatus, tensile tests of a high purity polycrystalline zinc were carried out in a wide range of deformation speed. The finding of increase in the brittle-to-ductile transition pressure with increasing strain rate is discussed on the basis of rate dependence of fracture stress.


(Received 1983/09/6)

Keywords:

testing apparatus, high hydrostatic pressure, high deformation speed, zinc, brittle-to-ductile transition


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