Excellent room temperature deformability in high strain rate regimes of magnesium alloy

Magnesium and its alloys have the lowest density among structural metallic materials; thus, this light-weight metal has great potential for reducing the weight, for example, of vehicles and trains. However, due to its crystal structure, deformability is poor; in particular, under compressive stress....

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Bibliographic Details
Published in:Scientific reports 2018-01, Vol.8 (1), p.656-9, Article 656
Main Authors: Somekawa, Hidetoshi, Singh, Alok, Sahara, Ryoji, Inoue, Tadanobu
Format: Article
Language:English
Subjects:
119/118
639/301/1023/1026
639/301/1023/303
Alloys
Aluminum
Crystal structure
Deformability
Deformation
Grain boundaries
Humanities and Social Sciences
Magnesium
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Magnesium and its alloys have the lowest density among structural metallic materials; thus, this light-weight metal has great potential for reducing the weight, for example, of vehicles and trains. However, due to its crystal structure, deformability is poor; in particular, under compressive stress. In this study, we modified magnesium with bismuth as an alloying element, which has the characteristics of being likely to form precipitates instead of grain boundary segregation. The Mg-Bi binary alloy showed excellent deformability and high absorption of energy in high-strain rate regimes at room temperature via contribution of grain boundary sliding. These properties, which are closely comparable to those of conventional middle-strength aluminum alloys (Al-Mg and Al-Mg-Si series alloys), have never been observed before in magnesium alloys. The development of such properties opens the door for not only academic but also industrial research in magnesium.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-19124-w