Effect of Nb addition on the solidification structure of Fe–Mn–C–Al twin-induced plasticity steel
| Autor: | Chang-Ling Zhuang, Changrong Li, Du Wenhui |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Technology
Materials science 0211 other engineering and technologies Chemicals: Manufacture use etc isometric crystal TP1-1185 02 engineering and technology Plasticity C/AL General Materials Science Solidification microstructure Physical and Theoretical Chemistry Composite material 021102 mining & metallurgy computer.programming_language Chemical technology TP200-248 grain size refinement 021001 nanoscience & nanotechnology Condensed Matter Physics high-manganese steel inclusion Mechanics of Materials Inclusion (mineral) solidification microstructure 0210 nano-technology computer |
| Zdroj: | High Temperature Materials and Processes, Vol 39, Iss 1, Pp 599-607 (2020) |
| ISSN: | 2191-0324 0334-6455 |
| DOI: | 10.1515/htmp-2020-0056 |
| Popis: | The solidification microstructure of an Fe–Mn–C–Al high-Mn steel with added Nb was studied by optical microscopy and scanning electron microscopy. The results showed that the size of the columnar and equiaxed grains in the solidified structure of the high-Mn steel without added Nb was large. When Nb was added, the size of the equiaxed and columnar grains in the solidification structure of the high-Mn steel decreased. The twin-induced plasticity in the high-Mn steel with added Nb clearly refined the grain size of the solidified structure and simultaneously increased the equiaxed crystallization rate. The high-melting-point second-phase particles increased the heterogeneous nucleation rate, which was beneficial for grain refinement. A large amount of Nb precipitates from the solidification process increased the equiaxed crystallization rate of the solidified microstructure. The increased crystallization rate affected the growth direction of the columnar and equiaxed grains during solidification and indirectly decreased the probability of crack formation, which improved the quality of the twin-induced plastic steel. |
| Databáze: | OpenAIRE |
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