Microstructure of AZ31 magnesium alloy produced by continuous variable cross-section direct extrusion (CVCDE)

Microstructure of AZ31 magnesium alloy produced by continuous variable cross-section direct extrusion (CVCDE)
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连续变截面直接挤压(CVCDE)AZ31镁合金的显微组织

DOI:
10.1016/j.matlet.2014.07.116
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发表时间:
2014-11
期刊:
影响因子:
3
通讯作者:
N. Bian
N. Bian
中科院分区:
材料科学3区
文献类型:
--
作者:
F. Li;X. Zeng;N. Bian

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为了研究连续变截面直接挤压(CVCDE)大塑性变形(SPD)新工艺对镁合金力学性能的改善作用,采用电子背散射衍射(EBSD)技术研究了连续变截面直接挤压AZ31镁合金的微观组织和织构。与常规挤压相比,连续挤压变形可以在不改变挤压比的情况下增加挤压过程中的累积应变。在CVCDE的作用下,粗晶被进一步剪切细化,动态再结晶晶粒数量增加。同时,该方法能显著削弱基体织构,提高CVCDE产品的抗拉强度和延伸率,为制备性能优异的镁合金提供了一条有效途径。
In order to study the effect of a new Severe Plastic Deformation (SPD) technique-continuous variable cross-section direct extrusion (CVCDE) on improving the mechanical properties of magnesium alloy, electronic backscattered diffraction (EBSD) was employed to investigate the microstructure and texture of CVCDEed AZ31 magnesium alloy. Compared with conventional extrusion (CE), CVCDE can increase the accumulated strain without changing the total extrusion ratio during extrusion process. Under the effect of CVCDE, coarse grains can be further sheared up to refined grains and the number of dynamic recrystallization grains increases. At the same time, this method can significantly weaken basal plane texture and improve tensile strength and elongation of CVCDEed product, which provides an effective way to produce excellent performance magnesium alloys.
镁合金AZ31在循环挤压压缩过程中的显微组织演变
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