Crack propagation in as-extruded and heat-treated mg-dy-nd-zn-zr alloy explained by the effect of lpso structures and their micro-and nanohardness

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Petra Maier
  • Benjamin Clausius
  • Asta Richter
  • Benjamin Bittner
  • Norbert Hort
  • Roman Menze

The investigation of the crack propagation in as-extruded and heat-treated Mg-Dy-Nd-Zn-Zr alloy with a focus on the interaction of long-period stacking-ordered (LPSO) structures is the aim of this study. Solution heat treatment on a hot extruded Mg-Dy-Nd-Zn-Zr (RESOLOY®) was done to change the initial fine-grained microstructure, consisting of grain boundary blocky LPSO and lamellar LPSO structures within the matrix, into coarser grains of less lamellar and blocky LPSO phases. C-ring compression tests in Ringer solution were used to cause a fracture. Crack initiation and propagation is influenced by twin boundaries and LPSO lamellae. The blocky LPSO phases also clearly hinder crack growth, by increasing the energy to pass either through the phase or along its interface. The microstructural features were characterized by micro-and nanohardness as well as the amount and location of LPSO phases in dependence on the heat treatment condition. By applying nanoindentation, blocky LPSO phases show a higher hardness than the grains with or without lamellar LPSO phases and their hardness decreases with heat treatment time. On the other hand, the matrix increases in hardness by solid solution strengthening. The microstructure consisting of a good balance of grain size, matrix and blocky LPSO phases and twins shows the highest fracture energy.

Original languageEnglish
Article number3686
JournalMaterials
Volume14
Issue number13
Number of pages22
ISSN1996-1944
DOIs
Publication statusPublished - 01.07.2021

    Research areas

  • Crack propagation, Hardness, LPSO phases, Magnesium, Mg-Dy-Nd-Zn-Zr, Nanoindentation, RESOLOY®
  • Engineering

Documents

DOI

Recently viewed

Researchers

  1. Thomas Glaser

Publications

  1. Umweltverschmutzung durch Licht
  2. The more severe the merrier: Severity of error consequences stimulates learning from error
  3. Approaches and Lessons in Political Career Research
  4. Electrical and Mechanical Characterization of Polymer Nanofibers for Sensor Application
  5. Ethos, Pathos, PowerPoint
  6. Mobilizing Memes
  7. New developments in extrusion of profiles with variable curvatures and cross-sections
  8. On some geometric control properties of active suspensions systems
  9. Machine Learning for the Quantified Self
  10. Participation and inclusiveness in the Intergovernmental Science–Policy Platform on Biodiversity and Ecosystem Services
  11. An Extended Kalman Filter as an Observer in a Sliding Mode Controller for a Metal-Polymer Composite Actuator
  12. Conjectural variations equilibrium in a mixed duopoly
  13. Influence of clouds on the photochemical degradation in aqueous phase - II
  14. Degradation of 5-FU by means of advanced (photo)oxidation processes
  15. Transdisciplinary learning as a key leverage for sustainability transformations
  16. Construction of Container Terminal 4
  17. Morphometric differentiation in a specialised snail predatior
  18. The Late Masterwork of Gilles Deleuze
  19. Beating Time
  20. Mit allen Kindern durch Anwendungsorientierung zu mathematischen Strukturen
  21. VALUES-BASED BUSINESS MODEL INNOVATION-THE CASE OF ECOSIA AND ITS BUSINESS MODEL
  22. Impact of an Acceptance Facilitating Intervention on Patients’ Acceptance of Internet-based Pain Interventions
  23. How to Predict Mood?
  24. Reprint of: Drivers of within-tree leaf trait variation in a tropical planted forest varying in tree species richness
  25. Business Judgement Rule