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Screening materials tests up to failure are performed to assess the influence of size, strain rate and temperature on the material response under homogenous as well as non-homogenous states of strain; they are accompanied by theoretical investigations. The paper describes first results of quasi-static and dynamic tensile tests at room temperature of smooth geometrically similar specimens made of the ferretic reactor pressure vessel steel 20MnMoNi55 and the austenitic steel X6CrNiNb1810 used for reactor internals. Furthermore, within a strength-of-materials approach, a simple gradient enhanced plasticity model is applied to describe the size dependence of the yield stress of mild steel in pure bending.

Additional information

Bibliographic Reference: Paper presented: 15th International Conference on Structural Mechanics in Reactor Technology (SMiRT), Seoul (KO), 15-20th August (1999)
Availability: Available from Publications and Public Relations Unit, Ispra (IT)
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