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 |
Understanding the DSA Phenomenon in Extruded Mg-Rare Earth Alloys throughout In-situ Synchrotron Diffraction and Acoustic Emission Experiments |
Author(s) |
Gerardo Garces, Pablo Pérez, Bryan W Chávez, Rafael Barea, Kristian Mathis, Kai Guan, Daisuke Egusa, Eiji Abe, Paloma Adeva |
On-Site Speaker (Planned) |
Gerardo Garces |
Abstract Scope |
To analyze and explain the phenomenon, in-situ synchrotron radiation and acoustic emission experiments during compression tests have been performed in a binary extruded Mg-RE (Y, Gd and Nd) alloy with the addition of transition metals. The compression tests have been carried out at temperatures between 25-300ºC and strain rates in a range of 4×10-5 - 8×10-3 s-1, conditions in which the DSA phenomenon appears. The experiments of synchrotron radiation and acoustic emission indicate that serrations are associated with simultaneous competitive movement of diffusing solute atoms and mobile dislocations or twin boundaries taking place during plastic deformation. In addition to the pinning of mobile dislocation, the segregation of rare earth and transition metals atoms at twin boundaries results in an additional source of the serration flow. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |