Fatigue resistance of press hardened 22MnB5 steels
| Autor: | Parareda Oriol, Sergi |
|---|---|
| Přispěvatelé: | Mateo García, Antonio Manuel, Casellas Padró, Daniel, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Mecànica de la fractura
Fatiga Acer -- Aliatges Materials -- Fatigue Defectes superficials macromolecular substances Estampació en calent Enginyeria dels materials [Àrees temàtiques de la UPC] Steel alloys Mecànica de fractura Acers al Bor Troquelat Materials -- Fatiga Fracture mechanics Resistencia de materials |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Press hardening of Boron steels, mainly the 22MnB5 grade, has been implemented during more than a decade in several structural components of the automotive sector, mostly in the body-in-white (BiW). The process combines sheet forming and heat treatment in one single die quenching step, to produce components with complex geometry and strength up to 1600 MPa. In press hardened steels, fatigue behaviour is very sensitive to surface defects or irregularities, either intrinsic or introduced during forming operations such as trimming. This work addresses the understanding and prediction of fatigue resistance of press hardened steels from a Linear Elastic Fracture Mechanics (LEFM) approach. The size of fatigue originating defects has been evaluated and used to estimate the fatigue limit for different surface conditions (coated and uncoated), different coatings (Al-Si and Zn) and different edge conditions (polished and mechanically trimmed). |
| Databáze: | OpenAIRE |
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