Influence of Mg content in Al alloys on processing characteristics and dynamically recrystallized microstructure of friction surfacing deposits

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

Friction Surfacing (FS) coatings are deposited by severe plastic deformation at elevated temperatures (≈0.8*Tliquidus), requiring different process parameters for alloys of even small composition variations. For Al alloys it is known that with increasing Mg content the thermal softening rate decreases, i.e. the material retains higher flow strength under thermomechanical processing. Further, the stacking fault energy (SFE) decreases with increasing Mg content, which influences gliding characteristics of dislocations, and also deformation and recrystallization behavior. To elucidate the influence of such known properties on FS process parameters and resulting coatings, three Al alloys differing only in Mg content (0.27, 2 and 3.5 wt.%) were processed by FS in this study. Pronounced shear flow localization was observed for increasing Mg content, yielding thin and narrow coatings and requiring a reduction of process speeds. Further, the decrease in SFE with increasing Mg content resulted in lower recrystallized grain size and higher grain orientation differences, due to a lower tendency for dislocation annihilation by recovery.

Original languageEnglish
Article number141407
JournalMaterials Science and Engineering A
Volume819
ISSN0921-5093
DOIs
Publication statusPublished - 05.07.2021

Bibliographical note

The authors thank D. Valenta of University Duisburg-Essen for support during the EBSD measurements. The authors also thank A. Fischer of Max Planck Institute for Iron Research for discussions, tips, and support. The authors cordially thank Ahmet Karkar for his efforts and the Interdisciplinary Center for Analytics on the Nanoscale (ICAN) at University Duisburg-Essen for providing equipment for the TEM studies. The authors further thank Erbslöh Aluminium GmbH (WKW automotive group) for providing the Al alloys for this project. This project is funded by the Deutsche Forschungsgemeinschaft (DFG , German Research Foundation ) – project number: 323162991. The authors acknowledge the financial support by DFG .

    Research areas

  • Al–Mg-Alloys, Dynamic recrystallization, Friction surfacing, Shear strain rate, Stacking fault energy
  • Engineering

Recently viewed

Publications

  1. A Two-Stage Augmented Extended Kalman Filter as an Observer for Sensorless Valve Control in Camless Internal Combustion Engines
  2. Stimulating Computing
  3. Comparison of three methods of length compensation in a parallel kinematic and their equivalence conditions
  4. Introduction
  5. Can a Revision of the Universal Service Scope Result in Substantive Change?
  6. Modeling and simulation of the heterogenous material behavior in thermal-sprayed coatings
  7. Sliding Mode Control of an Inductive Power Transmission System with Maximum Efficiency
  8. Hybrid modelling by machine learning corrections of analytical model predictions towards high-fidelity simulation solutions
  9. Estimated substitution elasticities of a nested CES production function approach for Germany
  10. Short-arc measurement and fitting based on the bidirectional prediction of observed data
  11. Graph-Based Early-Fusion for Flood Detection
  12. Adaptive Notch Filter in Wavelet Packet Trees
  13. An introduction to sliding mode control for interdisciplinary education
  14. Short and long-term dominance of negative information in shaping public energy perceptions
  15. Deconstructing and reconstructing diversity in client-provider-relationships of social work
  16. Analysis of the relevance of models, influencing factors and the point in time of the forecast on the prediction quality in order-related delivery time determination using machine learning
  17. A Framework for Applying Natural Language Processing in Digital Health Interventions
  18. Vielfalt des Alterns - Differenz oder Integration?
  19. Changing the decision context to enable social learning for climate adaptation
  20. On the Equivalence of Transmission Problems in Nonoverlapping Domain Decomposition Methods for Quasilinear PDEs