Obtaining a Homogeneous Fe-C Nanostructure from a Ferritic-Pearlitic Dual-Phase Steel by High Pressure Torsion
We processed a ferritic-pearlitic dualphase steel under high pressure torsion for three and five rotations at room temperature, the results shew the concurrent processes of the grain refinement of ferrite phase and the decomposition of the cementite lamellae. After three rotations, a non-homogeneous structure was observed. The ferrite structure contained both cellular structure and banded nanogranular structure. The cementite was fragmented to fine particles, aligned along the longitudinal direction of the banded ferrite structure in the local region. After five rotations, a homogeneous mixture of nanoscaled equiaxed ferrite crystallites and cementite particles was obtained, without any visible trace of the former lamellar-type structure or particle alignment. The size distribution of the remaining cementite particles turned to a more narrow distribution skewed to finer sizes especially smaller than 10 nm, since the torsion increased from three to five rotations.
J.L Ning Yu.lvanisenko D.Wang M.Murashkin H.-J.Fecht
Institute fur Nanotechnologie,Karlsruhe Institute fur Technologie,Hermann-von-Helmholtz-Platz 1,7634 IPAM,Ufa State Aviation Technical University,K Marx str.12,450000 Ufa,Russia Institute fur Nanotechnologie,Karlsruhe Institute fur Technologie,Hermann-von-Helmholtz-Platz 1,7634
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
199-204
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）