习西男,刘琦,宁莉,等.半固态高熵合金研究进展[J].精密成形工程,2024,16(8):212-220.
XI Xinan,LIU Qi,NING Li,et al.Research Progress of Semi-solid High-entropy Alloys[J].Journal of Netshape Forming Engineering,2024,16(8):212-220. |
| 半固态高熵合金研究进展 |
| Research Progress of Semi-solid High-entropy Alloys |
| 投稿时间：2024-03-26 |
| DOI：10.3969/j.issn.1674-6457.2024.08.024 |
| 中文关键词: 高熵合金 半固态 触变成形 组织结构 高温变形 高温氧化 |
| 英文关键词: high-entropy alloys semi-solid processing thixoforming microstructure high temperature deformation high temperature oxidation |
| 基金项目:国家自然科学基金(52204373，12274362) |
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| 摘要点击次数: 654 |
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| 中文摘要: |
| 虽然高熵合金在诸多方面表现出很大的应用潜力，但是由于其原材料普遍昂贵且制备加工成本高，该类新型合金的开发和应用大大受到限制。半固态成形是一种在固-液两相区直接成形的技术，可以实现金属材料的短流程和近终成形，大大降低了合金产品的制备成本，同时又能保持其优异的性能，在推动高熵合金应用方面具有现实意义。本文主要综述了近年来通过半固态成形技术制备半固态高熵合金的最新研究成果，总结了不同的半固态成形工艺及半固态坯料的制备方法，着重对比分析了不同半固态处理条件下，处理温度和处理时间对制备的半固态高熵合金微观组织结构和力学性能的影响规律，其中包括半固态高熵合金的凝固温度、相组成、组织演变、半固态球形组织的粗化动力学以及维氏硬度和屈服强度的变化等问题，综述了半固态高熵合金的高温塑性变形行为，对比了不同半固态合金的高温氧化行为。最后，对半固态高熵合金的研究进展进行了总结，并对其目前亟待解决的问题及未来发展方向进行了展望。 |
| 英文摘要: |
| Although high-entropy alloys (HEAs) have shown great application potential in many aspects, the development and application of HEAs are greatly limited due to the high cost of raw materials and processing. Semi-solid processing is directly formed in the solid-liquid two-phase region, which can realize the short process and near final forming of metal. This method can greatly reduce the preparation cost of alloy products, while maintaining their excellent properties, and has practical significance in promoting the application of HEAs. The latest research results of HEAs by semi-solid processing are introduced in detail. The different semi-solid forming processes and semi-solid slurry preparation methods are summarized. The effects of treatment temperature and time on the microstructure and mechanical properties of semi-solid HEAs under different semi-solid processing conditions are emphatically compared and analyzed, including solidification temperature, phase structure, microstructural evolution, coarsening kinetics process of the semi-solid spherical grains, and hardness and yield strength changes for the semi-solid HEAs, etc. The high temperature plastic deformation behaviors of the semi-solid HEAs are summarized and the high temperature oxidation behaviors of different semi-solid alloys are compared. Finally, the research progress of the semi-solid HEAs is summarized, and the issues that need to be solved urgently and the future development direction are prospected. |
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