Microstructural evolution of ultra-fine grained Mg-6.62Zn-0.6Zr alloy on the basis of adiabatic rise in temperature under dynamic loading

A. Malik, Wang Yangwei*, C. Huanwu, Faisal Nazeer, Muhammad Abubaker Khan, Wang Mingjun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

A fiber textured, {-1010}<-1-121> dominated component, ultrafine-grained Mg-Zn-Zr alloy was extruded at a temperature 350 °C with extrusion ratio ~30. The influence of the rise in temperature on twinning and texture behavior were investigated at high strain rate compression ranges (2149 s−1 to 4289 s−1) along the extruded direction. The characteristic sigmoidal curves show considerable grains re-orientation due to the signature of {10–12}<10–11> extension twinning, that causes very high flow stress of 572 MPa and nearly a strong basal texture was developed. A feasible mathematical analysis was used to find out the rise in temperature. A large increase in temperature ~212.9°C in the specimen's body was found that cause the low fraction of twining owing to non-basal slips activity. While a rise in temperature ~334°C was found inside the adiabatic shear band and edges of crack which is equal to the temperature required for dynamic recrystallization.

Original languageEnglish
Article number108810
JournalVacuum
Volume168
DOIs
Publication statusPublished - Oct 2019

Keywords

  • Adiabatic rise in temperature
  • Extrusion
  • Texture
  • Twinning
  • Ultrafine-grained ZK61 Mg alloy

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