Vu Viet Q, Toth Laszlo S, Beygelzimer Yan, Zhao Yajun
Laboratory of Excellence Design of Alloy Metals for Low-Mass Structures, CNRS, University of Lorraine, 57070 Metz, France.
LEM3 Laboratory, CNRS, Université de Lorraine, 57070 Metz, France.
Materials (Basel). 2021 May 10;14(9):2465. doi: 10.3390/ma14092465.
The Friction-Assisted Lateral Extrusion Process (FALEP) is a severe plastic deformation (SPD) technique for producing metal sheets from bulk metal or powder in one single deformation step at room temperature. In the present work, aluminum Al-1050 was deformed by FALEP. Then, its microstructure was examined by EBSD; the crystallographic texture by X-ray; material strength, ductility, and the Lankford parameter by tensile testing; the latter also by polycrystal plasticity simulations. It is shown that the microstructure was highly refined, with the grain size reduced more than 160 times down to 600 nm under the imposed shear strain of 20. The obtained texture was a characteristic simple shear texture with a shear plane nearly parallel to the plane of the sheet. The yield and ultimate strengths increased by about 10 times and three times, respectively. The Lankford parameter was 1.28, which is very high for aluminum, and due to the specific shear texture, unusual in a sheet. All these exceptional characteristics of Al-1050 were obtained thanks to the efficiency of the FALEP SPD process, which is a promising candidate for industrial applications.
摩擦辅助横向挤压工艺（FALEP）是一种严重塑性变形（SPD）技术，可在室温下通过单次变形步骤由块状金属或粉末生产金属板材。在本研究中，对铝Al-1050进行了FALEP变形处理。然后，通过电子背散射衍射（EBSD）研究其微观结构；通过X射线分析晶体织构；通过拉伸试验测定材料强度、延展性和兰克福德系数；后者还通过多晶体塑性模拟进行测定。结果表明，微观结构得到了高度细化，在20的剪切应变作用下，晶粒尺寸减小了160倍以上，降至600纳米。所获得的织构是一种典型的简单剪切织构，剪切面几乎平行于板材平面。屈服强度和抗拉强度分别提高了约10倍和3倍。兰克福德系数为1.28，这对于铝来说非常高，并且由于特定的剪切织构，在板材中较为罕见。由于FALEP SPD工艺的高效性，Al-1050具备了所有这些优异特性，该工艺是工业应用的一个有潜力的候选工艺。
