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

Publications

  1. Out of the box
  2. Correction to
  3. Dimensions of digital transformation in the context of modern agriculture
  4. Achieving consumer trust on Twitter via CSR communication
  5. Vibration Converter with Passive Energy Management for Battery‐Less Wireless Sensor Nodes in Predictive Maintenance
  6. Conception and analysis of Cascaded Dual Kalman Filters as virtual sensors for mastication activity of stomatognathic craniomandibular system
  7. Effects of season and man-made changes on baseflow and flow recession
  8. Tripartite networks show that keystone species can multitask
  9. Representation of Integration Profiles Using an Ontology
  10. Towards Ecosystems for Responsible AI
  11. Formative assessment in mathematics
  12. Learner pragmatics at the discourse level: Staying “on topic” in a telecollaborative eTandem task
  13. Who’s afraid of the senses? Organization, management and the return of the sensorium
  14. Implementation of EU labour law directives by way of national collective agreements
  15. Fallstudie
  16. Inclusive conservation and the Post-2020 Global Biodiversity Framework
  17. A Critical Evaluation of Network Approaches for Studying Species Interactions
  18. Skills and knowledge management in higher education
  19. Timing and fragmentation of daily working hours arrangements and income inequality
  20. Tentative Theses on Transformative Research in Real-World Laboratories
  21. Balancing the Boundary
  22. Future-proofing ecosystem restoration through enhancing adaptive capacity
  23. Microstructure, mechanical properties and fracture behaviors of large-scale sand-cast Mg-3Y-2Gd-1Nd-0.4Zr alloy
  24. Ecology: Mammals, interaction networks and the relevance of scale
  25. Operationalising the leverage points perspective for empirical research
  26. Differential mortality rates in major and subthreshold depression
  27. Repräsentation oder Gebrauchsort?
  28. Relativity in Social Cognition: Basic processes and novel applications of social comparisons
  29. Heterogenität
  30. An analysis of the requirements for DSS on integrated river basin management
  31. You Are Where You Eat: A Theoretical Perspective on Why Identity Matters in Local Food Groups
  32. Anatomical and neuromuscular variables strongly predict maximum knee extension torque in healthy men
  33. From temporal myopia to foresight: Bridging the near and the distant future through temporal work
  34. Evaluating the (cost-)effectiveness of guided and unguided Internet-based self-help for problematic alcohol use in employees
  35. Cultural change in Asia and beyond