A novel severe plastic deformation method for manufacturing Al/Mg bimetallic tube

A novel severe plastic deformation method for manufacturing Al/Mg bimetallic tube
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一种制造Al/Mg双金属管的新型剧烈塑性变形方法

DOI:
10.1007/s00170-021-07513-5
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发表时间:
2021-02
期刊:
The International Journal of Advanced Manufacturing Technology
影响因子:
--
通讯作者:
Dingfei Zhang
Dingfei Zhang
中科院分区:
其他
文献类型:
--
作者:
Ye Tian;Hongjun Hu;Dingfei Zhang

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提出了一种新的铝镁合金管材的强塑性变形工艺--管材挤压剪切(TES)工艺,该工艺将直接挤压与两步剪切相结合,用于制备铝镁合金管材。通过建立铝镁合金管材热挤压过程的三维有限元模拟,模拟了不同温度下载荷随行程的变化。为探讨铝镁合金管材在TES过程中的变形机理,对结合层的显微组织、相组成和显微硬度进行了观察和分析。较高的挤压温度会降低挤压载荷。挤压温度越高,粘结层缺陷越少,双金属管的粘结层质量越好。在界面过渡区可形成Mg 2Al 3、MgAl和Mg 17 Al 12三种共晶化合物。粘结层的平均硬度非常高。结果表明,TES工艺能产生较大的塑性变形,能制造出铝镁复合管,并能改善铝镁复合管的结合层。
A new severe plastic deformation for manufacturing Al/Mg bimetallic tube called the TES (tube extrusion shearing) process,.which combines direct extrusion with two-step shearing, has been developed to manufacture Al/Mg bimetallic tube. Load.evolution with stroke at different temperatures has been simulated by establishing three-dimensional finite element simulation.of the TES process of Al/Mg bimetallic tubes. To explore the deformation mechanisms of the Al/Mg bimetallic tube during the.TES process, the microstructures and phase compositions and microhardnesses of the bonded layer have been observed and.analyzed. A higher extrusion temperature would decrease the extrusion loads. Defects of bonding layer appear less if the.extrusion temperature is higher, and the bonding layer of the bi-metal tube has better quality. Three eutectic compounds,.Mg2Al3, MgAl, and Mg17Al12, can be formed in the interface transition zone. The average hardness of the bonding layer is very.high. The results indicate that the TES process can produce large plastic deformation and manufacture Al/Mg bimetallic tube and.improve the bonding layer.
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