Wang Nannan, Kang Xiaohui, Liu Wumeng, Wu Wenjie, Ren Kexu, Bao Xiaohui
Civil Aviation Flight University of China, Guanghan, 618307, China.
Luoyang College, Civil Aviation Flight University of China, Luoyang, 471000, China.
Heliyon. 2024 Jul 22;10(15):e35005. doi: 10.1016/j.heliyon.2024.e35005. eCollection 2024 Aug 15.
Zr-based amorphous alloys have attracted intensive attention for applications because of their excellent mechanical property. However, the welding process is inevitable for some special cases, such as the obtain of large size structure parts. It is significant to clarify the influence of introduced welding joints on mechanical properties in Zr-based amorphous alloys. Herein, the increased tensile strength of welding joints in Zr-based amorphous alloys is demonstrated by choosing a suitable initial temperature of Cu cooling fixtures for pulsed laser welding. It is found that an optimized tensile strength is observed when the initial temperature is -20 °C. With the decrease of the initial temperature from 10 to -30 °C, the tensile strength shows a trend of first increasing and then decreasing. Combined with the characterization of microstructures, it can be concluded that the increased tensile strength results from the precipitation of nanocrystals in the heat affected zone. Thus, our results provide a method to improve the mechanical property by controlling the microstructures of the heat affected zone in welding joints of Zr-based amorphous alloys.
锆基非晶合金因其优异的力学性能而在应用中备受关注。然而，在某些特殊情况下，如获得大尺寸结构部件时，焊接工艺是不可避免的。阐明引入的焊接接头对锆基非晶合金力学性能的影响具有重要意义。在此，通过为脉冲激光焊接选择合适的铜冷却夹具初始温度，证明了锆基非晶合金焊接接头的拉伸强度有所提高。研究发现，当初始温度为-20°C时，观察到优化的拉伸强度。随着初始温度从10°C降至-30°C，拉伸强度呈现先增加后降低的趋势。结合微观结构表征，可以得出拉伸强度增加是由于热影响区纳米晶体析出的结论。因此，我们的研究结果提供了一种通过控制锆基非晶合金焊接接头热影响区微观结构来提高力学性能的方法。
