High temperature mechanical behavior of an extruded Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Zijian Yu
  • Yuanding Huang
  • Hajo Dieringa
  • Chamini Lakshi Mendis
  • Renguo Guan
  • Norbert Hort
  • Jian Meng

The microstructure-property relation of an extruded Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy was investigated by conducting hot compression and high temperature creep at temperatures upto 250°C. The alloy exhibits an average compressive yield strength (σ CYS) of 363±1MPa and an average elongation to failure (ε CF) of 10.5±0.2% at room temperature, 301±13MPa and 12.8±1.1% at 200°C. In creep the minimum creep strain rate (ε˙) is 1.94×10-9s-1 at 175°C/160MPa and 6.67×10-9s-1 at 200°C/100MPa. The obtained stress exponent n is in the range of 3.7-4.7, suggesting that the creep is controlled by the dislocation climb mechanism. The improvement in compressive strength and creep resistance is attributed to the fine recrystallized grains, SFs in the grain interior, Mg5RE and LPSO phases at grain boundaries. The alloy exhibits a bimodal texture with 〈0001〉 and 〈 10-0〉 components. Its strengthening effect is determined by the competition between these two texture components. In compressive deformation, the textural evolution from 〈10 1 - 0〉 to 〈0001〉 is mainly attributed to the operation of basal 〈a〉 slip and {10 1 - 2}〈 10 1 - 1 〉 tensile twinning. This texture evolution is not seen in creep.

Original languageEnglish
JournalMaterials Science and Engineering A
Volume645
Pages (from-to)213-224
Number of pages12
ISSN0921-5093
DOIs
Publication statusPublished - 01.10.2015
Externally publishedYes

    Research areas

  • Compressive deformation, Creep, Hot extrusion, Magnesium alloys, Precipitation
  • Engineering

Recently viewed

Publications

  1. Exploding Images
  2. Stabilizing the grid with regional virtual power plants
  3. Effects of gadolinium and neodymium addition on young’s modulus of magnesium-based binary alloys
  4. Careless product use in access-based services
  5. Hot deformation behavior of Mg-2Sn-2Ca alloy in as-cast condition and after homogenization
  6. Effective digital practice in the competence-oriented English as a foreign language classroom in Germany
  7. Climate change as an element of sustainability communication
  8. Toward spatial fit in the governance of global commodity flows
  9. Corrosion behavior of As-Cast binary Mg-Dy alloys
  10. Method of Artificial Vision in Guide Cane for Visually Impaired People
  11. Is there a compensating wage differential for high crime levels?
  12. Knowledge Production in Consulting Teams: A Self-Organization Approach
  13. Fallstudie
  14. "Stürmische Plötzlichkeiten"
  15. Calibration of a simple method for determining ammonia volatilization in the field - Comparative measurements in Henan Province, China
  16. Collaborative Information Systems zur Selbstorganisation von ad-hoc-Helfern
  17. War isn't hell, it's entertainment
  18. More than Yield
  19. Direct measurement of cognitive load in multimedia learning
  20. Thinking and Diagrams - An Introduction
  21. Hot forging behavior of Mg−8Al−4Ba−4Ca (ABaX844) alloy and validation of processing map
  22. Simulation of stresses during casting of binary magnesium-aluminum alloys
  23. Effect of Sn additions on the age hardening response, microstructures and corrosion resistance of Mg-0.8Ca (wt%) alloys
  24. Instructional animation versus static pictures
  25. Efficient control of formation flying spacecraft
  26. Method for the determination of specific molecular markers of biomass burning in lake sediments