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首页> 外文会议>International Conference on Nanomaterials by Severe Plastic Deformation(NanoSPD3) >Strain-Induced Grain Refinement in Magnesium Alloy AZ31 during Hot Forging
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Strain-Induced Grain Refinement in Magnesium Alloy AZ31 during Hot Forging

机译：在热锻期间镁合金AZ31中的应变诱导的晶粒细化

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Strain-induced grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a temperature range from 423K to 623K and at a strain rate of 3x10~(-3)s~(-1). MDF with a pass strain of 0.8 was carried out to high cumulative strains of around 5 with changing of the loading direction during decreasing temperature from pass to pass. The structural changes can be characterized by the evolution of many mutually crossing kink bands at low strains followed by increase in their number and misorientation, finally resulting in a fully developed fine-grains at high strains. MDF with decreasing temperature can accelerate the evolution of much finer grains and the improvement of plastic workability. An average grain size of 0.3 μm is formed at an accumulative strain of 4.8 and at 423K. It is concluded that grain refinement under MDF conditions occurs by a series of deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization (cDRX).
机译：在423k至623k的温度范围内的多向锻造（MDF）中研究了镁合金AZ31中的应变诱导的晶粒细化，并以3×10〜（-3）〜（-1）的应变速率。通过0.8的通过菌株的MDF在5周围的高累积菌株中进行，随着通过通过的温度降低而改变负载方向。结构变化可以表征在低菌株中许多相互交叉的扭结带的演变，然后增加它们的数量和错误化，最终导致高菌株的完全发育的细粒。 MDF随着温度降低，可以加速更精细的晶粒的演变和塑料可加工性的提高。平均晶粒尺寸为0.3μm，形成为4.8和423k的累积菌株。结论是，在MDF条件下的晶粒细化通过一系列变形诱导的连续反应发生;这与连续动态再结晶（CDRX）基本类似。

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