Improved ductility of Mg–3Gd–0.6Zr alloy by cuboid-shaped phase: experiments and first-principle calculations.
- Resource Type
- Article
- Authors
- Chen, Qiaowang; Wang, Mingguang; Jiang, Yixuan; Wu, Xiang; Jiang, Shan; Chen, Xihao; Zhou, Wuzhong; Yang, Yanzhi; Xu, Zhaoying
- Source
- Materials Science & Technology. Sep2023, Vol. 39 Issue 14, p1816-1826. 11p.
- Subject
- *DUCTILITY
*CRYSTAL defects
*HYDROGEN embrittlement of metals
*SCANNING transmission electron microscopy
- Language
- ISSN
- 0267-0836
A casting Mg–3Gd–0.6Zr alloy was designed to evaluate the effect of cuboid-shaped phase on its mechanical properties. The morphology of cuboid-shaped phase was correlated with the directional covalent bonding between Gd atoms and H atoms along <100 > directions. The cuboid-shaped phase can be eliminated by a designed annealing treatment, without grain coarsening simultaneously. The ductility of as-cast alloy is about 20% higher than that of the annealed one. The improvement of ductility was caused by cuboid-shaped phase in three aspects: first-principle calculations, hydrogen embrittlement and crystal imperfections. [ABSTRACT FROM AUTHOR]