| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312847 |
| ISSN: | 1516-1439 |
| Authors: | Speer, John G1 Matlock, David K Assuncao, Fernando C. Rizzo2 Edmonds, David V3 |
| Institutions: | 1Colorado School of Mines, Golden, Colorado. Estados Unidos de América 2Pontificia Universidade Catolica do Rio de Janeiro, Rio de Janeiro. Brasil 3University of Leeds, Leeds, Yorkshire. Reino Unido |
| Year: | 2005 |
| Season: | Oct-Dic |
| Volumen: | 8 |
| Number: | 4 |
| Pages: | 417-423 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Analítico |
| English abstract | A new process concept, "quenching and partitioning" (Q&P) has been proposed recently for creating steel microstructures with retained austenite. The process involves quenching austenite below the martensite-start temperature, followed by a partitioning treatment to enrich the remaining austenite with carbon, thereby stabilizing it to room temperature. The process concept is reviewed here, along with the thermodynamic basis for the partitioning treatment, and a model for designing some of the relevant processing temperatures. These concepts are applied to silicon-containing steels that are currently being examined for low-carbon TRIP sheet steel applications, and medium-carbon bar steel applications, along with a silicon-containing ductile cast iron. Highlights of recent experimental studies on these materials are also presented, that indicate unique and attractive microstructure/property combinations may be obtained via Q&P. This work is being carried out through a collaborative arrangement sponsored by the NSF in the USA, CNPq in Brazil, and the EPSRC in the United Kingdom |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería mecánica, Ingeniería metalúrgica, Aleaciones, Acero, Microestructuras, Martensita |
| Keyword: | Engineering, Mechanical engineering, Metallurgical engineering, Alloys, Steel, Microstructures, Martensite |
| Full text: | Texto completo (Ver HTML) |
