Microstructure–Property Correlation in High-Strength Formable Steel with Varying Nb-Si Content
| Autor: | B. K. Jha, Pratiksha Pandey, Lalit Kumar Meena, Biraj Kumar Sahoo, Sandip Ghosh Chowdhury, Anjana Deva |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Precipitation (chemistry) Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Corrosion Expansion ratio Mechanics of Materials 0103 physical sciences Volume fraction Formability General Materials Science Texture (crystalline) Elongation 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 29:1901-1908 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-020-04675-3 |
| Popis: | High-strength formable quality (HSFQ) steel grades, steel A (0.038Nb, 0.031Si), steel B (0.034 Nb, 0.27Si), and steel C (0.044Nb, 0.26Si), with varying Nb and Si content has been investigated. The microstructure, texture, precipitation, mechanical properties and corrosion behavior of these steel grades have been explored. Very fine grain size in the range of 2.7-3.6 µm was obtained in all these steel grades through controlled hot rolling. However, a significant variation in the crystallographic texture and precipitation behavior in these steels was observed. A higher volume fraction of γ-fiber texture components and uniformly distributed fine Nb(C, N) precipitates were obtained in steel B as compared to steel A and C. This resulted in better properties in steel B with relatively high PSE (product of strength–elongation), high uniform elongation, and high hole expansion ratio. The corrosion properties of the steels were also evaluated, and steel B showed better corrosion resistance among the three grades. Considering the overall performance and properties of these steel grades, steel B with an optimum Nb and Si content is found to have better property and performance among the three grades. |
| Databáze: | OpenAIRE |
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