张彪,张明赫,季泽,等.面心立方中熵合金强韧化及力学性能研究进展[J].精密成形工程,2024,16(8):197-211.
ZHANG Biao,ZHANG Minghe,JI Ze,et al.Research Progress on Strengthening and Toughening and Mechanical Properties of Face-centered Cubic Medium-entropy Alloys[J].Journal of Netshape Forming Engineering,2024,16(8):197-211. |
| 面心立方中熵合金强韧化及力学性能研究进展 |
| Research Progress on Strengthening and Toughening and Mechanical Properties of Face-centered Cubic Medium-entropy Alloys |
| 投稿时间：2024-03-31 |
| DOI：10.3969/j.issn.1674-6457.2024.08.023 |
| 中文关键词: 中熵合金 强韧化机理 变形机制 力学性能 极端环境 |
| 英文关键词: medium-entropy alloys strengthening and toughening deformation mechanism mechanical property extreme environment |
| 基金项目:国家自然科学基金(51901078);中央引导地方科技发展资金项目(236Z1003G);河北省自然科学基金项目(E2022209070) |
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| 中文摘要: |
| 中熵合金是由3种主要元素组成的新型金属材料，具有高强度、高硬度、良好的高温抗软化性能、较高的低温韧性和丰富的设计性等优异性能，在诸多领域均具有广泛的应用前景，受到国内外学者的高度重视。然而，为了满足高精尖领域对高性能材料日益增长的需求，面心立方中熵合金的强度仍有巨大的提升空间，需要通过合金设计和制备工艺来调控强韧化机制。中熵合金力学性能的提升已从单一的强韧化机制，转向综合运用多种强韧化机制的协同作用，中熵合金应用的温度范围也由室温拓展到高温和低温环境。为了研究设计兼具高强度与高塑韧性的中熵合金。首先归纳了面心立方中熵合金的强韧化机理(固溶强化、形变强化、细晶强化、第二相强化、异质形变诱导(HDI)强化)以及变形机制(位错、孪晶、短程有序)对力学性能的影响，同时概括了中熵合金独有的特性。其次总结了中熵合金与传统合金在极端环境(高温和低温)下的力学性能并进行对比。最后对未来面心立方中熵合金强韧化研究和发展方向进行了展望。 |
| 英文摘要: |
| The medium-entropy alloy is a novel metal material comprising three primary elements. Due to its high strength, hardness, excellent high-temperature softening resistance, superior low-temperature toughness, and versatile design capabilities, it has a wide range of application prospects in many fields and has been highly valued by scholars in China and abroad. However, in order to meet the increasing demand for high-performance materials in high-tech fields, there is still a huge room for improvement in the strength of face-centered cubic medium-entropy alloys, and the strengthening and toughening effects need to be regulated by alloy design and preparation process. In the research field of medium-entropy alloys, the improvement of mechanical properties of medium-entropy alloys has shifted from a single strengthening and toughening mechanism to the synergistic effect of multiple strengthening and toughening mechanisms. The temperature range for the application of medium-entropy alloys has also expanded from room temperature to high and low temperature environments. The work aims to study and design a medium-entropy alloy with both high strength and high plasticity and toughness. Firstly, the effects of strengthening and toughening mechanisms (solid solution strengthening, deformation strengthening, grain refinement strengthening, second phase strengthening, hetero-deformation induced strengthening) and deformation mechanisms (dislocations, twins, short-range order) on the mechanical properties of medium-entropy alloys in face-centered cubic were summarized. At the same time, the unique characteristics of medium-entropy alloys were summed up. Secondly, the mechanical properties of medium-entropy alloys and traditional alloys in extreme environments (high temperature and low temperature) were summarized and compared. Finally, the future research and development direction of strengthening and toughening of entropy alloys in face-centered cubic were prospected. |
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