Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying
A novel medium-Mn steel microstructure with 0.1 wt.% Nb was designed using Thermo-Calc and JMatPro thermodynamic simulation software. The pseudo-binary equilibrium phase diagram and time−temperature transformation (TTT) and continuous cooling transformation (CCT) diagrams were simulated in...
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| Format: | Article |
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MDPI AG
2020-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/2/206 |
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| author | Perla Julieta Cerda Vázquez José Sergio Pacheco-Cedeño Mitsuo Osvaldo Ramos-Azpeitia Pedro Garnica-González Vicente Garibay-Febles Joel Moreno-Palmerin José de Jesús Cruz-Rivera José Luis Hernández-Rivera |
| author_facet | Perla Julieta Cerda Vázquez José Sergio Pacheco-Cedeño Mitsuo Osvaldo Ramos-Azpeitia Pedro Garnica-González Vicente Garibay-Febles Joel Moreno-Palmerin José de Jesús Cruz-Rivera José Luis Hernández-Rivera |
| author_sort | Perla Julieta Cerda Vázquez |
| collection | DOAJ |
| description | A novel medium-Mn steel microstructure with 0.1 wt.% Nb was designed using Thermo-Calc and JMatPro thermodynamic simulation software. The pseudo-binary equilibrium phase diagram and time−temperature transformation (TTT) and continuous cooling transformation (CCT) diagrams were simulated in order to analyze the evolution of equilibrium phases during solidification and homogenization heat treatment. Subsequently, the steel was cast in a vacuum induction furnace with the composition selected from simulations. The specimens were heat-treated at 1200 °C and water-quenched. The results of the simulations were compared to the experimental results. The microstructure was characterized using optical microscopy (OM) and scanning electron microscopy (SEM). We found that the as-cast microstructure consisted mainly of a mixture of martensite, ferrite, and a low amount of austenite, while the microstructure in the homogenization condition corresponded to martensite and retained austenite, which was verified by X-ray diffraction tests. In order to design further production stages of the steel, the homogenized samples were subjected to hot compression testing to determine their plastic flow behavior, employing deformation rates of 0.083 and 0.83 s<sup>−1</sup>, and temperatures of 800 and 950 °C. |
| first_indexed | 2024-12-13T07:02:42Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-13T07:02:42Z |
| publishDate | 2020-02-01 |
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| series | Metals |
| spelling | doaj.art-4114e3f09eb4492e841c570aa6f21d2c2022-12-21T23:55:53ZengMDPI AGMetals2075-47012020-02-0110220610.3390/met10020206met10020206Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as MicroalloyingPerla Julieta Cerda Vázquez0José Sergio Pacheco-Cedeño1Mitsuo Osvaldo Ramos-Azpeitia2Pedro Garnica-González3Vicente Garibay-Febles4Joel Moreno-Palmerin5José de Jesús Cruz-Rivera6José Luis Hernández-Rivera7Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Sierra Leona 550, Lomas 2a Sección, San Luis Potosí C.P. 78210, MexicoEscuela de Ingeniería y Ciencias Región Centro, Tecnológico de Monterrey campus Morelia, Av. Montaña Monarca 1340, Michoacán C.P. 58350, MexicoFacultad de Ingeniería-Universidad Autónoma de San Luis Potosí, Dr. Manuel Nava 8, Zona Universitaria, San Luis Potosí C.P. 78290, MexicoDivisión de Estudios de Posgrado, Tecnológico Nacional de México Campus Instituto Tecnológico de Morelia, Av. Tecnológico 1500, Michoacán C.P. 58120, MexicoInstituto Mexicano del Petróleo, Laboratorio de Microscopia Electrónica de Ultra Alta Resolución, Eje Central Lázaro Cárdenas 132, San Bartolo Atepehuacan C.P. 07730, MexicoDepartamento de Ingeniería en Minas, Metalurgia y Geología, Universidad de Guanajuato, Lascuráin de Retana No. 5, Col. Centro, Guanajuato C.P. 36000, MexicoInstituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Sierra Leona 550, Lomas 2a Sección, San Luis Potosí C.P. 78210, MexicoCONACYT-Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Sierra Leona 550, Lomas 2a Sección, San Luis Potosí C.P. 78210, MexicoA novel medium-Mn steel microstructure with 0.1 wt.% Nb was designed using Thermo-Calc and JMatPro thermodynamic simulation software. The pseudo-binary equilibrium phase diagram and time−temperature transformation (TTT) and continuous cooling transformation (CCT) diagrams were simulated in order to analyze the evolution of equilibrium phases during solidification and homogenization heat treatment. Subsequently, the steel was cast in a vacuum induction furnace with the composition selected from simulations. The specimens were heat-treated at 1200 °C and water-quenched. The results of the simulations were compared to the experimental results. The microstructure was characterized using optical microscopy (OM) and scanning electron microscopy (SEM). We found that the as-cast microstructure consisted mainly of a mixture of martensite, ferrite, and a low amount of austenite, while the microstructure in the homogenization condition corresponded to martensite and retained austenite, which was verified by X-ray diffraction tests. In order to design further production stages of the steel, the homogenized samples were subjected to hot compression testing to determine their plastic flow behavior, employing deformation rates of 0.083 and 0.83 s<sup>−1</sup>, and temperatures of 800 and 950 °C.https://www.mdpi.com/2075-4701/10/2/206advanced high-strength steels (ahss)medium-mn steelphase equilibrium |
| spellingShingle | Perla Julieta Cerda Vázquez José Sergio Pacheco-Cedeño Mitsuo Osvaldo Ramos-Azpeitia Pedro Garnica-González Vicente Garibay-Febles Joel Moreno-Palmerin José de Jesús Cruz-Rivera José Luis Hernández-Rivera Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying Metals advanced high-strength steels (ahss) medium-mn steel phase equilibrium |
| title | Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying |
| title_full | Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying |
| title_fullStr | Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying |
| title_full_unstemmed | Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying |
| title_short | Casting and Constitutive Hot Flow Behavior of Medium-Mn Automotive Steel with Nb as Microalloying |
| title_sort | casting and constitutive hot flow behavior of medium mn automotive steel with nb as microalloying |
| topic | advanced high-strength steels (ahss) medium-mn steel phase equilibrium |
| url | https://www.mdpi.com/2075-4701/10/2/206 |
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