Phase prediction and mechanical responses of high-entropy alloys
(1. School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China;
2. Shenzhen Research Institute of Shandong University, Shenzhen 518057, China;
3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
4. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, China;
5. State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;
6. Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials, Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China)
2. Shenzhen Research Institute of Shandong University, Shenzhen 518057, China;
3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
4. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, China;
5. State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;
6. Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials, Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China)
Abstract: High-entropy alloys (HEA) are novel materials obtained by introducing chemical disorder through mixing multiple-principal components, performing rather attractive features together with charming and exceptional properties in comparison with traditional alloys. However, the trade-off relationship is still present between strength and ductility in HEAs, significantly limiting the practical and wide application of HEAs. Moreover, the preparation of HEAs by trial-and-error method is time-consuming and resource-wasting, hindering the high-speed and high-quality development of HEAs. Herein, the primary objective of this work is to summarize the latest advancements in HEAs, focusing on methods for predicting phase structures and the factors influencing mechanical properties. Additionally, strengthening and toughening strategies for HEAs are highlighted, thus maximizing their application potential. Besides, challenges and future investigation direction of HEAs are also identified and proposed.
Key words: high entropy alloys; phase structure prediction; mechanical response; strengthening and toughening strategy; density functional theory