Effect of retained austenite and nonmetallic inclusions on the thermal/electrical properties and resistance spot welding nuggets of Si-containing TRIP steels
| Autor: | I. Mejía, C. Maldonado, V. H. Vargas, V.H. Baltazar-Hernandez |
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| Rok vydání: | 2019 |
| Předmět: |
Austenite
Materials science Scanning electron microscope Mechanical Engineering Metallurgy 0211 other engineering and technologies Metals and Alloys 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology chemistry.chemical_compound chemistry Geochemistry and Petrology Mechanics of Materials Thermal Materials Chemistry Inclusion (mineral) Non-metallic inclusions 0210 nano-technology Chemical composition Spot welding 021102 mining & metallurgy |
| Zdroj: | International Journal of Minerals, Metallurgy, and Materials. 26:52-63 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-019-1709-9 |
| Popis: | Five advanced high-strength transformation-induced plasticity (TRIP) steels with different chemical compositions were studied to correlate the retained austenite and nonmetallic inclusion content with their physical properties and the characteristics of the resistance spot welding nuggets. Electrical and thermal properties and equilibrium phases of TRIP steels were predicted using the JMatPro© software. Retained austenite and nonmetallic inclusions were quantified by X-ray diffraction and saturation magnetization techniques. The nonmetallic inclusions were characterized by scanning electron microscopy. The results show that the contents of Si, C, Al, and Mn in TRIP steels increase both the retained austenite and the nonmetallic inclusion contents. We found that nonmetallic inclusions affect the thermal and electrical properties of the TRIP steels and that the differences between these properties tend to result in different cooling rates during the welding process. The results are discussed in terms of the electrical and thermal properties determined from the chemical composition and their impact on the resistance spot welding nuggets. |
| Databáze: | OpenAIRE |
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