Wang Xiao, Luo Yapeng, Huang Tao, Liu Huixia
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China.
Materials (Basel). 2017 May 12;10(5):523. doi: 10.3390/ma10050523.
Recently, amorphous alloys have attracted many researchers' attention for amorphous structures and excellent properties. However, the welding of amorphous alloys to traditional metals in the microscale is not easy to realize in the process with amorphous structures unchanged, which restrains the application in industry. In this paper, a new method of welding Fe-based amorphous alloys (GB1K101) to crystalline copper by laser impact welding (LIW) is investigated. A series of experiments was conducted under different laser energies, during which Fe-based amorphous alloys and crystalline copper were welded successfully by LIW. In addition, the microstructure and mechanical properties of welding joints were observed and measured, respectively. The results showed that the surface wave and springback were observed on the flyer plate after LIW. The welding interface was straight or wavy due to different plastic deformation under different laser energies. The welding interface was directly bonded tightly without visible defects. No visible element diffusion and intermetallic phases were found in the welding interface. The Fe-based amorphous alloys retained amorphous structures after LIW under the laser energy of 835 mJ. The nanoindentation hardness across the welding interface showed an increase on both sides of the welding interface. The results of the lap shearing test showed that the fracture position was on the side of copper coil.
近年来，非晶合金因其非晶结构和优异性能而吸引了众多研究人员的关注。然而，在微观尺度下将非晶合金与传统金属进行焊接，且保持非晶结构不变的过程并不容易实现，这限制了其在工业中的应用。本文研究了一种通过激光冲击焊接（LIW）将铁基非晶合金（GB1K101）与结晶铜焊接的新方法。在不同激光能量下进行了一系列实验，在此期间通过激光冲击焊接成功地将铁基非晶合金与结晶铜焊接在一起。此外，分别对接头的微观结构和力学性能进行了观察和测量。结果表明，激光冲击焊接后在飞片上观察到了表面波和回弹现象。由于不同激光能量下的塑性变形不同，焊接界面呈直线或波浪状。焊接界面直接紧密结合，无明显缺陷。在焊接界面未发现明显的元素扩散和金属间相。在835 mJ的激光能量下，铁基非晶合金在激光冲击焊接后仍保留非晶结构。沿焊接界面的纳米压痕硬度在焊接界面两侧均有所增加。搭接剪切试验结果表明，断裂位置在铜线圈一侧。
