| Autor: |
A. Erman Tekkaya, Till Clausmeyer, Florian Nürnberger, Florian Gutknecht, Gregory Gerstein |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
The Minerals, Metals & Materials Series ISBN: 9783319514925 |
| DOI: |
10.1007/978-3-319-51493-2_20 |
| Popis: |
In sheet-bulk metal forming processes the hardening behavior of the material depends on the sequence of deformation steps and the type of deformation. Loading path changes induce transient hardening phenomena. These phenomena are linked to the formation and interaction of oriented dislocation structures. The aim of this study is to investigate the effect of continuous and discontinuous loading path changes on the dislocation microstructure in ferritic and ferritic-martensitic dual-phase steel, respectively. For the experiments a biaxial test stand was used, which permits to continuously change the load from tension to shear. In the ferrite single-phase steel transmission-electron microscopy reveals a reduced evolution of oriented dislocation structures for continuous loading path changes compared to discontinuous loading path changes. This evolution is further decreased in dual-phase steel compared to the ferritic steel. Microstructural results for the ferritic steel are accompanied by simulation results with a transient hardening model. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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