Processing Effects on the Formability of Extruded Flat Products of Magnesium Alloys
Processing Effects on the Formability of Extruded Flat Products of Magnesium Alloys
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DOI：
10.3389/fmats.2019.00253
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发表时间：
2019-10
影响因子：
3.2
通讯作者：
M. Nienaber;K. Kainer;D. Letzig;J. Bohlen
中科院分区：
文献类型：
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作者：
M. Nienaber;K. Kainer;D. Letzig;J. Bohlen
镁合金扁材挤压过程中的组织和织构发展与轧制板材的组织和织构发展有很大不同。特别是已经表明，在挤出的情况下，微观结构和纹理的范围是宽的，这允许所得纹理的显著变化。采用三种添加织构调节元素Nd（ZN10）、Ca（ZX10）和Al（AZ31）的变形镁锌合金，在不同的工艺参数下挤压扁带型材。这允许挤出物的晶粒尺寸和纹理的明显变化。的机械性能和形成行为（埃里克森值IE）的影响，揭示和讨论相对于显微组织和织构。它可以表明，一个弱对齐的基面是优选的增强的可成形性超过一个明显的对齐基面，即使取向优先为基面滑移。
The development of microstructure and texture during flat product extrusion of magnesium alloys differs significantly from those of rolled sheets. It has especially been shown that the range of microstructures and textures is broad in the case of extrusion which allows significant variations of the resulting textures. Three wrought magnesium-zinc alloys with texture modifying elements Nd (ZN10), Ca (ZX10) and Al (AZ31) have been used to extrude flat band profiles with varied processing parameters. This allowed a distinct variation of grain sizes and textures of the extrudates. The impact on the mechanical properties and the forming behaviour (Erichsen values IE) is revealed and discussed with respect to the microstructure and texture. It can be shown that a weak alignment of basal planes is preferred for enhanced formability over a distinct alignment of basal planes even if oriented preferentially for basal slip.