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The Work Softening Behavior of Pure Mg Wire during Cold Drawing

机译:纯镁丝冷拔过程中的工作软化行为

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摘要

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 <101¯0> fiber (~28% accumulative true strain), and then rapidly returned to the weak basal texture.
机译:我们对纯Mg焊丝进行了多遍冷拔,该焊丝在室温下表现出出色的可成型性(约138%的累积真实应变)。与在镁合金线材冷拔过程中发生的连续加工硬化不同,对于纯镁而言,最初的硬度和强度快速增加,接着是明显的加工软化,最终达到约40〜45 HV的稳态水平。功软化可以归因于纯镁在室温下的动态恢复和重结晶。同时,在28〜34%的应变范围内,随着加工硬化向软化的转变,组织成分也发生了突变。在整个绘图过程中,最强的纹理成分逐渐从拉伸后的基础转变为<10 <数学xmlns:mml =“ http://www.w3.org/1998/Math/MathML” id =“ mm1” overflow =“ scroll“> 1 0>光纤(〜28%累积真应变),然后迅速恢复到较弱的基础纹理。

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