Exploring the microstructure and tensile properties of cold-rolled low and medium carbon steels after ultrafast heating and quenching
| Autor: | Diego J. Celentano, Bernd Schulz, F. M. Castro Cerda, A. Monsalve, Roumen Petrov, Ilchat Sabirov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Quenching Austenite Materials science Bainite Mechanical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Mechanics of Materials Ferrite (iron) 0103 physical sciences Ultimate tensile strength General Materials Science Composite material 0210 nano-technology Ductility Strengthening mechanisms of materials |
| Zdroj: | Materials Science and Engineering: A. 745:509-516 |
| ISSN: | 0921-5093 |
| Popis: | The aim of the present study is to evaluate the impact of heating rate on the microstructure and tensile properties of cold-rolled low and medium carbon steels. For this purpose, cold-rolled low and medium carbon steels were subjected to short peak-annealing experiments at 900 and 1100 °C under three heating rates (10, 450 and 1500 °C/s). The microstructure reveals a mixture of phases and microconstituents (ferrite, bainite, and as-quenched martensite) which are related to the carbon heterogeneities in austenite. The microstructural characterization suggests that the grain refinement achieved after ultrafast heating has a minor effect on the yield and ultimate tensile strength, compared to the relative microstructural distribution. It is suggested that the interplay of various strengthening mechanisms in samples subjected to ultrafast heating rates are responsible for the observed increase in strength and ductility. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect