Investigating the Microstructure, Crystallographic Texture and Mechanical Behavior of Hot-Rolled Pure Mg and Mg-2Al-1Zn-1Ca Alloyopen access
- Authors
- Chaudry, U.M.[Chaudry, U.M.]; Hamad, K.[Hamad, K.]; Jun, T.-S.[Jun, T.-S.]
- Issue Date
- Oct-2022
- Publisher
- MDPI
- Keywords
- AZ alloys; EBSD; grain refinement; magnesium; Texture
- Citation
- Crystals, v.12, no.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- Crystals
- Volume
- 12
- Number
- 10
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/101315
- DOI
- 10.3390/cryst12101330
- ISSN
- 2073-4352
- Abstract
- In this study, the microstructure, crystallographic texture and the mechanical performance of hot-rolled pure Mg and Mg-2Al-1Zn-1Ca (herein inferred as AZX211) were thoroughly investigated. The results showed that the designed AZX211 alloy exhibited an exceptional strength/ductility synergy where an almost 40% increase in ductility was received for AZX211. The microstructural characterization revealed the grain refinement in the AZX211, where the grain size was reduced by more than 50% (24.5 µm, 10 µm for the pure Mg and the AZX211, respectively). Moreover, a discernible number of precipitates were dispersed in the AZX211, which were confirmed to be (Mg, Al)2Ca. The pure Mg showed a conventional strong basal texture while a significantly weakened split basal texture was received for the AZX211. The fraction of basal-oriented grains was 21% for the pure Mg and 5% for the AZX211. The significant texture weakening for the AZX211 can be attributed to the precipitation and co-segregation that triggered the preferential evolution of the non-basal grains while impeding the growth of the basal grains. This was also confirmed by the crystal orientation and the pseudo-rocking curves. The higher ductility of the AZX211 was explained based on the texture softening and Schmid factor for the basal and non-basal slip systems. © 2022 by the authors.
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