Processing of AZ31 magnesium alloy by a new noble severe plastic deformation method
Processing of AZ31 magnesium alloy by a new noble severe plastic deformation method
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DOI：
10.1016/j.msea.2010.10.033
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发表时间：
2011-01
期刊：
影响因子：
6.4
通讯作者：
S. M. Fatemi-Varzaneh;A. Zarei‐Hanzaki
中科院分区：
文献类型：
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作者：
S. M. Fatemi-Varzaneh;A. Zarei‐Hanzaki
采用累积反挤压工艺对变形镁合金AZ31进行了成形研究。这通过不同的热机械加工路线（在80 - 380 ° C的温度下的不同ABE变形道次）来进行。结果表明，AZ31镁合金即使在80 ° C的低温下，也可以通过ABE工艺成功地实现变形。在ABE处理之后，进行了复杂的显微硬度测试，并使用光学显微镜进行了彻底的显微组织观察。结果表明，获得了等轴亚微米晶粒。随着道次的增加，获得了具有更细的平均晶粒尺寸的更均匀的组织。研究还发现，提高温度导致更大的平均晶粒尺寸和更高的显微组织均匀性。
In the present investigation a wrought magnesium alloy (AZ31) has been processed applying the accumulative back extrusion (ABE) method. This was performed through different thermomechanical processing routes (different ABE deformation passes at temperatures of 80–380°C). The results indicate that AZ31 alloy may successfully be deformed through ABE processing even at temperatures as low as 80°C. Following the ABE processing a sophisticated microhardness testing was conducted and thorough microstructural observations were undertaken using optical microscopy. The results show that the equiaxed submicron size grains have been achieved. As the number of passes was increased, a more homogeneous microstructure with finer mean grain size was obtained. It was also found that increasing the temperature resulted in larger mean grain size and also higher microstructural homogeneity.