高熵合金的发展及工业应用展望

高熵合金是近十几年来出现的一类新型金属材料,通常由5种或5种以上的元素以等原子比或近等原子比构成,形成以固溶体相为主的组织结构.高熵合金概念的提出,突破了传统合金的设计理念,极大拓展了合金设计的空间.由于具有大晶格畸变、高混合熵、原子缓慢扩散和"鸡尾酒"效应等多重效应,高熵合金显示出高强度、高韧性、高硬度、异常优异的低...

Perspective on industrial applications and research progress of high-entropy alloys

High-entropy alloys, which usually composed of 4 or more elements in equiatomic or near equiatomic ratio with a solid solution structures, have emerged as a new kind of metallic materials for a recent decade. The proposed philosophy of high-entropy alloys has broken through the paradigm of traditional alloy design and largely expanded the scope of alloy exploration. Meanwhile, high-entropy alloys exhibit several unique properties, such as high strength and hardness, unusual low-temperature toughness, high corrosion resistance and radiation resistance, due to the large lattice distortion, high mixing entropy, slow diffusion of atoms and cocktail effects. In this paper, we made a brief summary of the present research on high-entropy alloys, and discussed the potential applications of high-entropy alloys in extreme environments as new-emerged structural materials. In particular, the possibility of high-entropy alloys used in the key components of petroleum industries, e.g. drill pipe joint belt, bushing and high-performance riser, etc., was emphatically analyzed.