The effect of two cooling velocity on strain-aging sensibility of 16MnR hot rolled steel plate has been studied.

A comparative analysis of the relevant specifications on the impact toughness and strain aging sensitivity of steels in some steel penstock codes and relevant steel standards, pressure vessel codes at home and abroad is carried out.

Inclusions,aging sensitivity, widmanstatten pattern.

In this paper, the response of different electric parameter (dc resistance and ac impedance and capacity )to strain-sensing ability of CFRC has been studied by dc resistance and ac impedance and capacity measuring techniques.

The results demonstrate that skin stiffness decreases with increasing thermal damage degree and there exist strain rate sensitivity at different damage levels,caused mainly by hydration changes.

The strain hardening exponent n and strain rate sensitivity index m were obtained.

The results show that there is a reverse Hall-Petch relationship between the yield stress and the grain size of ECAE AZ31 Mg alloy,and the tension-compression asymmetry is weakened;ECAE alloy also exhibits a strain rate sensitivity,and the strain rate sensitivity factor will be increased with increasing the process temperature.

Investigation on the strain rate sensitivity of the aluminium foam containing silicate rubber;

Under different strain rate,research is taken on the dynamic compressing stress of sandwich beams with aluminum foam core including strain responding attribute,energy absorbing characteristic and strain rate sensitivity.

The thermal viscoplastic constitutive equation was established by the impact compression and the impact shearing tests by the split Hopkinson pressure bar(SHPB),the process of local plastic instability at higher strain rates was analyzed,the criterion of plastic instability was obtained,and the nature of the high strain rate sensitivity for local plastic instability was revealed.