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Open AccessArticle

Evolution of Recrystallized Grain and Texture of Cold-Drawn Pure Mg Wire and Their Effect on Mechanical Properties

by Jiao Meng 1,2,†, Liuxia Sun 3,†, Yue Zhang 1,2, Feng Xue 1,2,4, Chenglin Chu 1,2 and Jing Bai 1,2,4,*
1
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2
Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University, Nanjing 211189, China
3
College of Arts and Sciences, Shanghai Dianji University, Shanghai 201306, China
4
Suzhou Institute of Biomedical Devices, Southeast University, Suzhou 215000, China
*
Author to whom correspondence should be addressed.
Jiao Meng and Liuxia Sun made equal contribution to this work.
Materials 2020, 13(2), 427; https://doi.org/10.3390/ma13020427
Received: 16 December 2019 / Revised: 13 January 2020 / Accepted: 14 January 2020 / Published: 16 January 2020
Static recrystallization plays a key role in the fabrication of thin Mg wires as well as the mechanical properties of the final wires. The effect of annealing parameters on the evolution of the microstructures, textures and mechanical properties of cold-drawn pure Mg wire was studied by means of optical microscopy (OM), electron backscatter diffraction (EBSD), a tensile test and a hardness test. This study shows that the mechanical properties of as-annealed pure thin Mg wire is affected not only by the average grain size, but also the uniformity of the recrystallization grains, including the uniformity of grain size and crystal orientation distribution (more random texture component). With increasing annealing temperature and time, the uniformity of recrystallization grain size first improved and then declined after obvious grain growth. At the same time, the randomness of the basal texture component declined with the development of recrystallization. Annealing at 300 °C for 30 min caused the most uniform grain size and orientation distribution in the microstructures, thus contributing to the best plasticity among all experimental wires. It is reasonable to conclude that more uniform and regular recrystallized grains and a more randomly distributed crystal orientation would be benefit for the mechanical properties of Mg wires. View Full-Text
Keywords: pure Mg wire; recrystallization; microstructure; texture; mechanical property pure Mg wire; recrystallization; microstructure; texture; mechanical property
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Meng, J.; Sun, L.; Zhang, Y.; Xue, F.; Chu, C.; Bai, J. Evolution of Recrystallized Grain and Texture of Cold-Drawn Pure Mg Wire and Their Effect on Mechanical Properties. Materials 2020, 13, 427.

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