Deformation Mechanism, Microstructure, and Mechanical Properties Evolution of Mg-Gd-Y-Zr Alloy during Cold Torsion.

Materials (Basel)

Light Alloy Research Institute, Central South University, Changsha 410083, China.

Published: April 2021

- The Mg-Gd-Y-Zr alloy underwent torsion at various strain levels at room temperature, showing noticeable basal slip and some dislocations, but little significant sliding.
- Twinning types 101¯0 and 101¯2 were infrequently observed, even at high strain levels (0.294), indicating a specific deformation behavior.
- Twisting the alloy changed its Y fiber texture, slightly dispersing the basal pole, while simultaneously increasing both tensile and compressive strengths.

Mg-Gd-Y-Zr alloy was subjected to torsion of various strain levels at room temperature. Obvious traces of basal slip were observed in the twisted alloy. Dislocations of were also observed, but there were no signs of significant sliding. Even in the sample whose equivalent strain became 0.294, 101¯0 twinning and 101¯2 twinning were rarely seen. The deformation mode with predominant basal dislocations and subordinate dislocations resulted in a modified Y fiber texture with a basal pole slightly dispersed at about 70° from the twist axis. Mechanical tests revealed that the tensile strength and compressive strengths increased simultaneously after twisting.

Download full-text PDF	Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073187	PMC
http://dx.doi.org/10.3390/ma14082067	DOI Listing

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