Shear-assisted processing and extrusion (ShAPE) experimental setup and tooling were adopted for extruding thin-walled AA7075 aluminum tube from as-cast non-homogenized billet material in a single run. The mechanical and microstructural characterizations were performed on the as-extruded tube through tensile, hardness, electron backscatter diffraction (EBSD), and energy dispersive spectroscopy (EDS) tests. The results showed that the ShAPE process developed a significantly refined microstructure with uniform and almost equiaxed grain structure on both hoop and axial cross-sections of the extrudate as well as through the thickness of the material. The pole figures and inverse pole figures of the EBSD data showed a strong shear texture development, and it was found out that axial shear is the dominant deformation mechanism in the regions near the inner surface of the tube, while combined axial and torsional shears are the two dominant modes of deformation near the outer surface of the extrudate. As for the mechanical properties, there was an increase of 150 and 73% in the yield and ultimate strengths of the tube produced using ShAPE process, respectively, and an 18% decrease in maximum uniform plastic elongation compared to the conventionally extruded AA7075-O tube.

采用剪切辅助加工和挤压（ShAPE）实验装置和工具，一次完成了从铸态非均质坯料挤压薄壁AA7075铝管的过程。通过拉伸，硬度，电子背散射衍射（EBSD）和能量色散光谱（EDS）测试对挤压后的管材进行机械和微观结构表征。结果表明，ShAPE工艺在挤出物的环向和轴向横截面以及整个材料厚度上均开发出了显着细化的微观结构，具有均匀且几乎等轴的晶粒结构。EBSD数据的极坐标图和反极坐标图显示了强烈的剪切织构发展，并发现轴向剪切是管内表面附近区域的主要变形机制，而轴向和扭转剪切组合是挤出物外表面附近的两种主要变形模式。至于机械性能，与传统挤出的AA7075-O管相比，使用ShAPE工艺生产的管的屈服强度和极限强度分别提高了150％和73％，最大均匀塑性伸长率降低了18％ 。