Metallurgical Abstracts on Light Metals and Alloys vol.56
Effect of strain-induced grain boundary migration on microstructure and creep behavior of extruded AZ31 magnesium alloy prepared by pre-compression and annealing treatment
Takahiro Mineta*, Ryusuke Suzumura*, Akihiro Konya* and Hiroyuki Sato*
* Department of Mechanical Science and Engineering, Graduate School of Science and Technology, Hirosaki University
[Published in Materials Today Communications, Vol. 34 (2023), 105502]
https://doi.org/10.1016/j.mtcomm.2023.105502
E-mail: mineta[at]hirosaki-u.ac.jp
Key Words: Magnesium, Creep, Twin, Strain induced grain boundary migration, Schmid factor
In this study, the creep resistance of extruded AZ31 alloys was enhanced through the application of a PCA (pre-compression and annealing) process. The PCA process resulted in a significant coarsening of the grain size. Additionally, the basal texture of the extruded AZ31 alloys was weakened as a result of the PCA process. The creep resistance of the extruded AZ31 alloys was improved through the PCA process. The minimum creep rate decreased and the creep life increased with increasing pre-compressive strain in the PCA samples. It is posited that the significant coarsening of the grains and the alteration of the crystallographic orientation brought about by the PCA process contribute to the improved creep resistance of the extruded AZ31 alloys.
The inverse pole figure maps, the pole figures, and the creep curves of the AZ31 alloys before and after PCA process.