High entropy alloys (HEAs) and HEAs-related materials have developed rapidly over the last decade, and the key issues have gradually emerged when the welding of HEAs are required. Here, we provide a critical review on the state-of-the-art for the welding of HEAs-related materials, aiming to address the weldability of HEAs under the compositional diversity, different initial states, welding processes and parameters, joint configurations and service conditions. The recent progresses and challenges about fusion-based welding, solid-state welding and diffusion reaction-based welding of HEAs are reviewed comprehensively, considering the joints' microstructures, mechanical properties and functional performances. Additionally, HEAs fillers have exhibited great potentials in suppressing the formation of intermetallic phases, tailoring the weld components and improving the joint properties. The development tendency on the welding of HEAs is proposed, including establishing the criteria between HEAs-systems and the corresponding welding processes, employing the materials genome engineering strategy in HEAs designing and welding simulation, and exploring HEAs joints with multi-functional and high value-added applications.

近十年来，高熵合金（HEA）和高熵合金相关材料发展迅速，当需要焊接高熵合金时，关键问题逐渐浮出水面。在这里，我们对 HEAs 相关材料焊接的最新技术进行了批判性审查，旨在解决 HEAs 在成分多样性、不同初始状态、焊接工艺和参数、接头配置和服务下的可焊性使适应。从接头的显微结构、力学性能和功能性能等方面，综合评述了近年来HEAs融合焊接、固态焊接和扩散反应焊接的研究进展和面临的挑战。此外，HEAs 填料在抑制金属间相的形成方面表现出巨大的潜力，调整焊接部件并改善接头性能。提出了HEA焊接的发展趋势，包括建立HEA系统与相应焊接工艺之间的标准，在HEA设计和焊接模拟中采用材料基因组工程策略，探索具有多功能和高价值的HEA接头。添加的应用程序。