Improving Mn partitioning and mechanical properties through carbides-enhancing pre-annealing in Mn-reduced transformation-induced plasticity steel
| Autor: | D. Han, Yunbo Xu, Fei Peng, Weihua Sun, Rendong Liu, Zou Ying |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Austenite Materials science Cementite Annealing (metallurgy) Intercritical annealing Mechanical Engineering Metallurgy Metals and Alloys 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Carbide Ferritic matrix chemistry.chemical_compound chemistry Mechanics of Materials 0103 physical sciences General Materials Science 0210 nano-technology |
| Zdroj: | Scripta Materialia. 187:274-279 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2020.06.027 |
| Popis: | A novel processing strategy was proposed, first to promote Mn partitioning behavior during intercritical annealing, second to improve the fraction and stability of retained austenite (RA) and third to enhance mechanical properties of Mn-reduced transformation-induced plasticity (TRIP) steel. By deliberately preparing large-fractioned Mn-enriched cementite before final annealing, the intercritical austenite was encouraged to inherit relatively high Mn content from pre-existing cementite. Eventually, the formation of sufficiently stable RA together with the precipitation of fine VC particles in ferritic matrix contributes to much better yield strength-tensile strength-ductility combination of 763 MPa-1022 MPa-46.4%, which is superior to many steels containing higher Mn concentrations. |
| Databáze: | OpenAIRE |
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