The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process
The objective of this research work is to obtain the hot ductility behavior, and the structural, microstructural and mechanical characteristics of one of the latest generation of AHSS steels, a complex phase (CP) steel microalloyed with boron (0.006 wt.%), processed by hot and cold rolling operation...
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MDPI AG
2023-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/2/257 |
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| author | Antonio Enrique Salas-Reyes Gerardo Altamirano-Guerrero Rogelio Deaquino Armando Salinas Gabriel Lara-Rodriguez Ignacio Alejandro Figueroa Jesús Rafael González-Parra Barrie Mintz |
| author_facet | Antonio Enrique Salas-Reyes Gerardo Altamirano-Guerrero Rogelio Deaquino Armando Salinas Gabriel Lara-Rodriguez Ignacio Alejandro Figueroa Jesús Rafael González-Parra Barrie Mintz |
| author_sort | Antonio Enrique Salas-Reyes |
| collection | DOAJ |
| description | The objective of this research work is to obtain the hot ductility behavior, and the structural, microstructural and mechanical characteristics of one of the latest generation of AHSS steels, a complex phase (CP) steel microalloyed with boron (0.006 wt.%), processed by hot and cold rolling operations and heat-treated using two different quenching and partitioning (Q&P) treatments, a one-step partitioning (quenching to 420 °C) and the other a two-step partitioning (quenching to 420 °C and reheated to 600 °C). The results show that boron has a marked effect on the solidification process of the CP steel, refining the austenitic grain size. Due to its refinement, the boron-containing steel had better ductility throughout the temperature range examined (700–900 °C), i.e., the hot ductility trough. Thus, the minimum percentage of reduction in area (%RA) value occurring at 800 °C was 43% for the boron-free steel, compared with 58% for the boron-containing steel. Hence, cracking would not be a problem when straightening the strand on continuous casting. The benefit of boron addition on the room temperature properties was found to be very marked for the higher temperature two-step partitioning treatment, giving a yield stress of 1200 MPa, a UTS (ultimate tensile strength) of 1590 MPa and a total elongation above 11%. The final Q&P microstructure, in both one- and two-step partitioning conditions, consisted of retained austenite (RA-γ), martensite and ferrite islands in a bainitic matrix. Furthermore, the boron treated steel on quenching produced a greater amount of RA-γ, which accounted for its better room temperature ductility and produced a martensitic matrix rather than a bainitic one, giving it greater strength. The addition of boron improved the corrosion resistance of this type of third generation AHSS steel. |
| first_indexed | 2024-03-11T08:25:36Z |
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| id | doaj.art-d0cd525b1b254cce8a1233a073b3ab3f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T08:25:36Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-d0cd525b1b254cce8a1233a073b3ab3f2023-11-16T22:06:51ZengMDPI AGMetals2075-47012023-01-0113225710.3390/met13020257The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) ProcessAntonio Enrique Salas-Reyes0Gerardo Altamirano-Guerrero1Rogelio Deaquino2Armando Salinas3Gabriel Lara-Rodriguez4Ignacio Alejandro Figueroa5Jesús Rafael González-Parra6Barrie Mintz7Departamento de Ingeniería Metalúrgica, Facultad de Química, UNAM, Ciudad de México 04510, MexicoDivisión de Estudios de Posgrado e Investigación, Tecnológico Nacional de México/IT de Saltillo, Coahuila 25280, MexicoCentro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Saltillo, Coahuila 25900, MexicoCentro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Saltillo, Coahuila 25900, MexicoInstituto de Investigaciones en Materiales, UNAM, Ciudad de México 04510, MexicoInstituto de Investigaciones en Materiales, UNAM, Ciudad de México 04510, MexicoDepartamento de Ingeniería Metalúrgica, Facultad de Química, UNAM, Ciudad de México 04510, MexicoDepartment of Mechanical Engineering and Aeronautics, City University of London, London EC1V 0HB, UKThe objective of this research work is to obtain the hot ductility behavior, and the structural, microstructural and mechanical characteristics of one of the latest generation of AHSS steels, a complex phase (CP) steel microalloyed with boron (0.006 wt.%), processed by hot and cold rolling operations and heat-treated using two different quenching and partitioning (Q&P) treatments, a one-step partitioning (quenching to 420 °C) and the other a two-step partitioning (quenching to 420 °C and reheated to 600 °C). The results show that boron has a marked effect on the solidification process of the CP steel, refining the austenitic grain size. Due to its refinement, the boron-containing steel had better ductility throughout the temperature range examined (700–900 °C), i.e., the hot ductility trough. Thus, the minimum percentage of reduction in area (%RA) value occurring at 800 °C was 43% for the boron-free steel, compared with 58% for the boron-containing steel. Hence, cracking would not be a problem when straightening the strand on continuous casting. The benefit of boron addition on the room temperature properties was found to be very marked for the higher temperature two-step partitioning treatment, giving a yield stress of 1200 MPa, a UTS (ultimate tensile strength) of 1590 MPa and a total elongation above 11%. The final Q&P microstructure, in both one- and two-step partitioning conditions, consisted of retained austenite (RA-γ), martensite and ferrite islands in a bainitic matrix. Furthermore, the boron treated steel on quenching produced a greater amount of RA-γ, which accounted for its better room temperature ductility and produced a martensitic matrix rather than a bainitic one, giving it greater strength. The addition of boron improved the corrosion resistance of this type of third generation AHSS steel.https://www.mdpi.com/2075-4701/13/2/257hot ductility behaviorcomplex phase steelquenching and partitioning (Q&P) steelboron contentmultiphasic microstructuremechanical properties |
| spellingShingle | Antonio Enrique Salas-Reyes Gerardo Altamirano-Guerrero Rogelio Deaquino Armando Salinas Gabriel Lara-Rodriguez Ignacio Alejandro Figueroa Jesús Rafael González-Parra Barrie Mintz The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process Metals hot ductility behavior complex phase steel quenching and partitioning (Q&P) steel boron content multiphasic microstructure mechanical properties |
| title | The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process |
| title_full | The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process |
| title_fullStr | The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process |
| title_full_unstemmed | The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process |
| title_short | The Hot Ductility, Microstructures, Mechanical Properties and Corrosion Resistance in an Advanced Boron-Containing Complex Phase Steel Heat-Treated Using the Quenching and Partitioning (Q&P) Process |
| title_sort | hot ductility microstructures mechanical properties and corrosion resistance in an advanced boron containing complex phase steel heat treated using the quenching and partitioning q p process |
| topic | hot ductility behavior complex phase steel quenching and partitioning (Q&P) steel boron content multiphasic microstructure mechanical properties |
| url | https://www.mdpi.com/2075-4701/13/2/257 |
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