增材制造高熵合金研究进展

高熵合金(High-entropy alloys, HEA)由于具有优异的力学性能、抗高温氧化性能、耐腐蚀性能等优点,受到了越来越多学者的关注。目前高熵合金的制备一般采用传统的铸锻轧,这对于制备一些形状复杂的高端零部件和超细晶组织是一种严峻的挑战,而采用增材制造(Additive Manufacturing,AM)技术是解决上述问题的一个有效途径。重点阐述了国内外近年来在高熵合金增材制造材料种类、快速凝固非平衡组织演化、裂纹等成形缺陷、力学性能及成形特征方面的研究进展,为增材制造高熵合金进一步发展提供一定参考。最后,对增材制造高熵合金的研究进展进行了总结,并对增材制造高熵合金成分的设计提供了一定的思路。

Research Progress of High-entropy Alloys by Additive Manufacturing

High-entropy alloys (HEAs) attract more and more attention of scholars for their excellent mechanical properties, high-temperature oxidation resistance, corrosion resistance and other advantages. But, at present, the HEAs are usually fabricated by traditional casting, forging and rolling, which is a severe challenge for the preparation of high-end parts with complex shapes and ultra-fine grains. Additive manufacturing (AM) technology is an effective way to solve the above problem. In this paper, the research progress on the types of materials, rapid solidification non-equilibrium microstructure evolution, cracks and other forming defects, mechanical properties and forming characteristics of HEAs additive manufacturing in domestic and overseas in recent years was mainly described, providing some references for the further development of high-entropy alloy additive manufacturing. Finally, the research progress of HEAs was summarized, and some ideas were provided for design of high entropy alloy composition.