Influence of Torsion on Precipitation and Hardening Effects during Aging of an Extruded AZ91 Alloy

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Bo Song
  • Tingting Liu
  • Renlong Xin
  • Hong Yang
  • Ning Guo
  • Linjiang Chai
  • Yuanding Huang
  • Norbert Hort

The effect of torsional deformation by various routes prior to artificial aging treatment on the microstructure of extruded AZ91 rods was investigated. The tension and compression properties along the extruded direction were tested to evaluate the hardening effect. The results showed that torsional deformation can largely enhance the subsequent age-hardening effect. A detailed microstructural characterization revealed that torsional deformation produced a high density of dislocations and {10-12} twins, which can promote continuous precipitation and increase the number density of the Mg17Al12 phase. In addition, part of dislocations and the {10-12} twins were retained after aging treatment. The combination of the increased precipitation hardening by Mg17Al12, dislocation strengthening and refinement strengthening contributed to the high hardening effect. Moreover, the hardening effect can be further increased by tailoring the torsion route. The torsion route exhibited little influence on the age-hardening effect, while it remarkably affected the texture of the twisted AZ91 rods. Reciprocating torsion had little influence on the texture. In contrast, unidirectional torsion caused the c-axis of the texture to rotate toward the extrusion direction, resulting in a texture softening effect. Therefore, combining reciprocating torsion and aging caused a higher hardening effect than combining unidirectional torsion and aging. The detailed strengthening mechanism was analyzed and is discussed.

Original languageEnglish
JournalJournal of Materials Engineering and Performance
Volume28
Issue number7
Pages (from-to)4403-4414
Number of pages12
ISSN1059-9495
DOIs
Publication statusPublished - 15.07.2019
Externally publishedYes

    Research areas

  • aging treatment, AZ91alloy, mechanical properties, processing route, torsional deformation
  • Engineering

Recently viewed

Publications

  1. Vermittlungstheologie II. Dogmatisch
  2. Spielt Charlie Parker in den Wind oder mit ihm?
  3. From the environmental state to the sustainability state? Conceptualization, indicators, and examples
  4. Action and action-regulation in entrepreneurship: Evaluating a student training for promoting entrepreneurship
  5. Wege in eine bessere Zukunft der Hochschulen
  6. Threshold stress during tensile and compressive creep in AE42 magnesium alloy
  7. General conclusions
  8. Tuning into Things
  9. Facing complex crime
  10. Public service media, innovation policy and the ‘crowding out’ problem
  11. Does a smile open all doors? Understanding the impact of appearance disclosure on accommodation sharing platforms
  12. Space-focused stereotypes and their potential role in group-based disparities in social work services
  13. High-Volume Resistance Training Improves Double-Poling Peak Oxygen Uptake in Youth Elite Cross-Country Skiers and Biathletes
  14. A Performance Motivator in one Country, A Non-Motivator in Another?
  15. Logic as a Medium
  16. Experimental-numerical study of laser-shock-peening-induced retardation of fatigue crack propagation in Ti-17 titanium alloy
  17. Farewell to the party model?
  18. Zinc and cadmium accumulation in single zebrafish (Danio rerio) embryos - A total reflection X-ray fluorescence spectrometry application
  19. Kosmopolitismus
  20. Debattieren im Unterricht
  21. A review of ecosystem service benefits from wild bees across social contexts
  22. European hospitals as a Source for Platinum in the Environment in Comparison with Other Sources
  23. Reconciling Analytics with Holistic Thinking in Business Sustainability Decision-Making
  24. The priority value of scrubland habitats for carnivore conservation in Mediterranean ecosystems
  25. Modern Micropolitics of Antipopulism
  26. Datenbasierte Selbst- und Fremdevaluation
  27. Developments in Qualitative Mindfulness Practice Research
  28. "Das muss man umdrehen und dann passt es"
  29. Community-based Entrepreneurship and Rural Development
  30. Inmitten der Extreme
  31. Teacher intervention versus self-regulated learning?
  32. Calibration of the Chemcatcher ® passive sampler for monitoring selected polar and semi-polar pesticides in surface water
  33. Recent developments in the manufacture of complex components by influencing the material flow during extrusion
  34. Mathematik 1
  35. Audit quality and materiality disclosure quality in integrated reporting
  36. Manipulating Belief in Free Will and Its Downstream Consequences
  37. Microstructural, mechanical and corrosion characterization of an as-cast Mg–3Zn–0.4Ca alloy for biomedical applications