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□ Microstructural evolution and grain growth mechanism of pre-twinned magnesium alloy during annealing

- Corresponding Author: Sung Hyuk Park (Materials Science and Engineering)
- First Author: Ye Jin Kim (Materials Science and Engineering, Ph.D. Candidate)
- Co-first Author: Jong Un Lee (Materials Science and Engineering, Ph.D. Candidate), Young Min Kim (Korea Institute of Materials Science, Implementation Research Division Senior Researcher)
- JCR Top 0.62%, IF=10.088
- Journal of Magnesium and Alloys (2021. 7. 15.)

*Registered in Web of Science & Scopus DB

It is known that although magnesium (Mg) alloys have lower density and higher specific strength than other commercially available structural metals such as steels and aluminum (Al) alloys, Mg alloys have low ductility and formability at room temperature (RT) because of their strong basal texture. In the attempt to address this issue, this research discovers, for the first time, the microstructural evolution and grain growth mechanism of pre-twinned magnesium alloys during annealing.

To date, many studies have attempted to weaken the basal texture of Mg alloys through the addition of rare-earth (RE) elements; however, such a process has been reported to cause undesirable increases in the cost and specific gravity of Mg alloys. This research, however, has discovered a new process that is simple, cost effective, while able to produce Mg alloys of low density and high stability. Such a finding is meaningful in the development of lightweight, eco-friendly, and high-performance material for industries including those of automobiles, aircrafts, and railroads.

KNU Materials Science and Engineering Team led by Professor Sang Hyuk Park continually undertakes research to develop a future generation of eco-friendly, vehicle, low-cost but highly stable Mg alloys through the discovery of new compound metals as well as the design of new processes and evaluation methods.