Dependence of tensile properties on microstructural features of bimodal-sized ferrite/cementite steels
| Autor: | Jie Li, Shen-bai Zheng, Ming-ming Wang, Jiangli Ning, Yunli Feng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Equiaxed crystals Materials science Cementite Metallurgy Metals and Alloys 02 engineering and technology Work hardening 021001 nanoscience & nanotechnology 01 natural sciences Grain size chemistry.chemical_compound chemistry Mechanics of Materials Ferrite (iron) 0103 physical sciences Ultimate tensile strength Particle-size distribution Materials Chemistry Elongation Composite material 0210 nano-technology |
| Zdroj: | Journal of Iron and Steel Research International. 24:67-76 |
| ISSN: | 2210-3988 1006-706X |
| DOI: | 10.1016/s1006-706x(17)30010-9 |
| Popis: | A medium-carbon steel was processed through different warm rolling techniques, and the microstructural features with bimodal grain size distribution were found to be different. The combination of strength and ductility was ameliorated in the steel processed through warm rolling characterized by biaxial reduction. The enhanced strength is attributed to the densely distributed fine intragranular cementite particles and the small grain size in the coarse grain regions. The enhanced uniform elongation is due to the improved work hardening behavior at the large-strain stage. This work hardening behavior is predominantly ascribed to the finely dispersed intragranular particles. The relatively small grain size with nearly equiaxed shape in the coarse grain regions helps stabilize the uniform deformation to a large strain. |
| Databáze: | OpenAIRE |
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