Microstructural design in quenched and partitioned (Q&P) steels to improve their fracture properties
| Autor: | R. Thiessen, Jon M. Molina-Aldareguia, Cecilia Föjer, I. de Diego-Calderón, Ilchat Sabirov, Roumen Petrov |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Austenite Quenching Toughness Materials science Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Fracture toughness Mechanics of Materials Martensite 0103 physical sciences Fracture (geology) General Materials Science 0210 nano-technology Ductility |
| Zdroj: | Materials Science and Engineering: A. 657:136-146 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2016.01.011 |
| Popis: | Quenching and partitioning (Q&P) is receiving increased attention as a novel heat treatment to produce advanced high strength steels (AHSSs) containing martensite/retained austenite mixtures, with desirable combination of strength, ductility and toughness. Despite the significant body of research on microstructure and mechanical properties of Q&P steels, there is still a significant lack of knowledge on the effect of complex microstructure on their mechanical performance. This work addresses the effect of microstructural architecture in multiphase Q&P steels on their fracture behavior at macro- and micro-scales. It is demonstrated that the RA volume fraction does not affect significantly the local fracture initiation toughness, whereas it can greatly improve the total crack growth resistance in Q&P steels. In addition, matrix conditions can play an important role in the fracture behavior of Q&P steels. Based on the analysis of the experimental results, a general recipe to tailor fracture properties of Q&P steels is proposed. |
| Databáze: | OpenAIRE |
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