Abstract

The microstructure and texture of 7075-T6 FSW weld with optimal parameters are investigated using optical microscopy, electron back scatter diffraction and neutron diffraction. The mechanical properties are characterized through microhardness, nanoindentation and ultrasonic tests. The friction stir welding is performed at a nominal rotational speed of 1400 rpm and a traverse speed of 60 mm/min. The nugget zone contained fine, equiaxed and fully recrystallized grains. The texture of the base material mainly consisted of Cube and rotated Goss components. However, in the nugget zone, the dominant texture components were B and \({\bar {\text{B}}}\) among common shear orientations. Elastic modulus was measured by ultrasonic and nanoindentation methods. The ultrasonic method being nondestructive, easy, inexpensive and fast. It is found that a little increase of Young modulus is observed in nugget zone compared to base metal.

中文翻译：

---

搅拌摩擦铝合金的组织，织构和力学性能

摘要

使用光学显微镜，电子背散射衍射和中子衍射研究了具有最佳参数的7075-T6 FSW焊缝的组织和织构。机械性能通过显微硬度，纳米压痕和超声测试来表征。搅拌摩擦焊以标称转速1400 rpm和横向速度60 mm / min进行。熔核区包含细小，等轴和完全重结晶的晶粒。基础材料的纹理主要由多维数据集和旋转的高斯组成。但是，在块金区域，主要的纹理成分是B和\（{\ bar {\ text {B}}} \\）常见的剪切方向。弹性模量通过超声和​​纳米压痕法测量。超声方法是非破坏性的，容易，廉价且快速。发现与母材相比，在熔核区中观察到杨氏模量略有增加。