SYMPOSIA PAPER Published: 01 January 1981
STP28208S

Influence of Neutron Irradiation on Mechanical Properties of Steels Under Impulsive Loading

Source

This paper describes the results of an investigation of the influence of neutron irradiation on mechanical properties of a low-alloy structural weldable steel under impulsive loading produced by means of the Hopkinson split pressure bar (HSPB) method. The general analysis of the HSPB technique is outlined briefly and applications to the irradiated steel are considered in greater detail.

The investigated steel was irradiated by fast neutrons to an exposure of 3.5 × 1024 neutrons (n) m−2. Extensive dynamic measurements provided the dependence of the flow stress σfi on strain rate ge in the interval 102–103s−1.

Particular attention is paid to the influence of postirradiation annealing on the material's recovery. Experiments performed at various annealing temperatures (200 to 400°C) and annealing times (16 to 168 h) are analyzed. The results show that the neutron irradiation does not influence the mechanisms of plastic flow at high rates of strain. Our original interpretation of the HSPB approach makes it possible to determine the plastic wave speed at different levels of recovery.

Author Information

Buchar, J
Institute of Physical Metallurgy, Czechoslovak Academy of Sciences, Czechoslovakia
Bílek, Z
Institute of Physical Metallurgy, Czechoslovak Academy of Sciences, Czechoslovakia
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Details
Developed by Committee: E10
Pages: 92–101
DOI: 10.1520/STP28208S
ISBN-EB: 978-0-8031-4794-2
ISBN-13: 978-0-8031-0755-7