The influence of temperature on microstructure and microhardness in high-pressure torsion of low-carbon steel

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Maier, G.G.^1 ; Astafurova, E.G.^1 ; Koshovkina, V.S.^1 ; Chomyakova, G.V.^1 ; Naydenkin, E.V.^1 ; Odessky, P.D.^2 ; Dobatkin, S.V.^3

Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, 634021, Tomsk, Russia^1

Central Research Institute of Building Structures, 109428, Moscow, Russia^2

A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119991, Moscow, Russia^3

关键词: High pressure torsions;    Ultrafine grained structure;    Warm deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012133/pdf
DOI  :  10.1088/1757-899X/63/1/012133

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The ultrafine-grained structures produced by cold (20 °C) and warm (450 °C) high- pressure torsion in low-carbon steel were studied using transmission electron microscopy and X-ray analysis. After cold high-pressure torsion, the size of fragments is smaller (100 nm) and structure is more homogeneous in comparison with warm deformation (120 nm). As a result of high-pressure torsion, the microhardness of steel investigated has been increased up to 600 HV and 570 HV after cold and warm deformation respectively.