Effect of Strain Rate on High Temperature Thermoplasticity of Structural Steels for Buildings
Low-alloy high-performance construction steel can effectively improve the mechanical properties of the material.In the study,the high-temperature thermoplasticity of the material was analysed,and it was chosen to study the changes of low-alloy high-performance construction steel at different strain rates by thermal simulation and microscopic observation.The results show that:at a low strain rate of 10-3s-1,the sufficient deformation time leads to more ferrite precipitation,which results in a plasticity trough;at a strain rate of 10s-1,the plasticity trough disappears immediately,and the thermoplastic deformation is significantly improved in the range of 1000~1200℃,as the section shrinkage gradually decreases with the increase of temperature.
high performance building structurehigh temperature thermoplasticityconstruction steelstrain rate