The Evolution of Structure and Mechanical Properties of Fe-Mn-V-Ti-0,1C Low-Carbon Steel Subjected to Severe Plastic Deformation and Subsequent Annealing
The present work deals with the evolution of mechanical properties and structure of low-carbon Fe-l,12Mn-0,08V-0,07Ti-0,lC (wt.%) steel after severe plastic deformation (SPD) and high-temperature annealing. Steel in initial ferritic-pearlitic state was deformed by equal channel angular pressing (ECAP) at T=200℃ and high pressure torsion (HPT) at room temperature. The evolution of ultrafine grained structure and its thermal stability were investigated after annealing at 400-700℃ for 1 hour. The results shown that SPD leads to formation of structure with an average size of (sub-) grain of 260 nm after ECAP and 90 nm after HPT. Ultrafine grained structures produced by SPD reveal a high thermal stability up to 500℃ after ECAP and 400℃ after HPT. At higher annealing temperatures a growth of structural elements and a decrease in microhardness were observed.
Galina G.Zakharova Elena G.Astafurova Eugene V.Naydenkin George I.Raab Sergey V.Dobatkin
Institute of Strength Physics and Materials Science,Siberian Branch of Russian Academy of Sciences,T Ufa State Aviation Technical University,Ufa,Russia A.A.Baikov Institute of Metallurgy and Materials Science,Russian Academy of Sciences,Moscow,Russia
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
325-330
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）