High-strength state of ultrafine-grained martensitic steel produced by high pressure torsion

4th International Conference Recent Trends in Structural Materials

Karavaeva, M.V.^1 ; Nikitina, M.A.^1 ; Ganeev, A.V.^1 ; Islamgaliev, R.K.^1

Ufa State Aviation Technical University, Institute of Physics of Advanced Materials, 12 K. Marx str., Ufa

450008, Russia^1

关键词: Deformation temperatures;    High pressure torsions;    High strength;    Severe plastic deformations;    Solution components;    Strengthening mechanisms;    Structure and properties;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/179/1/012037/pdf
DOI  :  10.1088/1757-899X/179/1/012037

来源: IOP

【 摘 要 】

The paper presents the study results on the effect of severe plastic deformation (SPD) via high pressure torsion (HPT) on the structure and properties of martensitic steel. The contribution of different strengthening mechanisms in the strength of steel has been analyzed. It is shown that independently of the deformation temperature the main contribution in hardening belongs to grain boundaries (about 50 %), whereas the dislocation and solid solution components achieve 15 and 25 %, respectively.