Fracture Resistance of Advanced High-Strength Steel Sheets for Automotive Applications
| Autor: | Jessica Calvo, P. Dietsch, T. Dieudonné, Daniel Casellas, C. Suppan, D. Frómeta, J. Rehrl, L. Grifé, A. Lara |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Ciència i Enginyeria dels Materials, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Acer 02 engineering and technology Expansion ratio Fracture toughness 0203 mechanical engineering Local formability Ultimate tensile strength Formability Strength of materials Composite material Resistència de materials Structural material Metallurgy Metals and Alloys Advanced high strength steel sheets Fracture mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Enginyeria dels materials::Metal·lúrgia [Àrees temàtiques de la UPC] Cracking 020303 mechanical engineering & transports Steel Mechanics of Materials Fracture (geology) 0210 nano-technology Cracking resistance Stretch flangeability |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-020-06119-y |
| Popis: | The fracture resistance of different advanced high-strength steel (AHSS) sheets for automotive applications is investigated through conventional tensile tests, fracture toughness measurements, and hole expansion tests. Different fracture-related parameters, such as the true fracture strain (TFS), the true thickness strain (TTS), the fracture toughness at crack initiation (w e i ), the specific essential work of fracture (w e), and the hole expansion ratio (HER), are assessed. The specific essential work of fracture (w e) is shown to be a suitable parameter to evaluate the local formability and fracture resistance of AHSS. The results reveal that fracture toughness cannot be estimated from any of the parameters derived from tensile tests and show the importance of microstructural features on crack propagation resistance. Based on the relation fracture toughness-local formability, a new AHSS classification mapping accounting for global formability and cracking resistance is proposed. Furthermore, a physically motivated fracture criterion for edge-cracking prediction, based on thickness strain measurements in fatigue pre-cracked DENT specimens, is proposed. |
| Databáze: | OpenAIRE |
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