About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
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Symposium
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12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
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Presentation Title |
Investigation of Microstructural Factors Affecting the Plane-strain Fracture Toughness of Mg-Zn-Y-Al Alloys Processed by Consolidation of Rapidly Solidified Ribbons |
Author(s) |
Soya Nishimoto, Shin-ichi Inoue, Michiaki Yamasaki, Yoshihito Kawamura |
On-Site Speaker (Planned) |
Soya Nishimoto |
Abstract Scope |
Recently, high strength and ductile nano-crystalline Mg-Zn-Y-Al alloys with LPSO phase have been developed via rapidly solidified (RS) ribbon-consolidation processing. These Mg alloys are expected to be used in aerospace industries because of their excellent mechanical properties and high corrosion resistance. However, it has been pointed out that the data on the fracture toughness of the alloys is insufficient. Therefore, in this study, we investigated fracture toughness of the alloys.
The RS ribbon-consolidated Mg-Zn-Y alloys subjected to pre-extrusion heat-treatment showed higher fracture toughness than the alloys without heat-treatment. Pre-extrusion heat-treatment conditions affected the morphology of LPSO phase in the RS alloys. In the alloys without heat-treatment, plate-shaped LPSO phase precipitated in grain interior. On the other hand, in the alloys with heat-treatment, LPSO phase precipitates grew into block-shaped ones. Formation of block-shaped LPSO phase and fine a-Mg grains may improve the fracture toughness of the alloys. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |