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Open AccessArticle

The Work Softening Behavior of Pure Mg Wire during Cold Drawing

by Liuxia Sun 1,2, Jing Bai 1,2,*, Feng Xue 1,2, Chenglin Chu 1,2 and Jiao Meng 1,2
1
School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, China
2
Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 602; https://doi.org/10.3390/ma11040602
Received: 5 March 2018 / Revised: 10 April 2018 / Accepted: 11 April 2018 / Published: 13 April 2018
(This article belongs to the Section Structure Analysis and Characterization)
We performed multiple-pass cold drawing for pure Mg wire which showed excellent formability (~138% accumulative true strain) at room temperature. Different from the continuous work hardening occurring during cold drawing of Mg alloy wires, for pure Mg, an initially rapid increase in hardness and strength was followed by significant work softening and finally reached a steady-state level, approximately 40~45 HV. The work softening can be attributed to the dynamic recovery and recrystallization of pure Mg at room temperature. Meanwhile, an abrupt change in texture component also was detected with the transition from work hardening to softening in the strain range of 28~34%. During the whole drawing, the strongest texture component gradually transformed from as-extruded basal to <10 1 ¯ 0> fiber (~28% accumulative true strain), and then rapidly returned to the weak basal texture. View Full-Text
Keywords: pure Mg; cold drawing; microstructure; texture; work softening pure Mg; cold drawing; microstructure; texture; work softening
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Sun, L.; Bai, J.; Xue, F.; Chu, C.; Meng, J. The Work Softening Behavior of Pure Mg Wire during Cold Drawing. Materials 2018, 11, 602.

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