Zheng Zhenghui, Lai Chen, Zhou Wenyuan, Wang Ying, Zhang Yingxiao, Wang Jinshu
Key Laboratory of Advanced Functional Materials, Education Ministry of China, Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Materials (Basel). 2023 Dec 24;17(1):102. doi: 10.3390/ma17010102.
W-Re alloys are one of the most important refractory materials with excellent high-temperature performance that were developed to improve the brittleness of tungsten. In the present work, we firstly summarized the research progress on the preparation and strengthening methods of a W-Re alloy. Then, the strengthening mechanisms of the W-Re alloy were discussed, including the influence of Re, solid solution strengthening, second-phase reinforcement and fine-grain strengthening. The results showed that the softening effect of Re was mainly related to the transformation of the preferred slip plane and the introduction of additional d-valence electrons. Some transition elements and refractory metal elements effectively strengthened the W-Re alloy. Carbides can significantly enhance the high-temperature mechanical properties of W-Re alloys, and the reasons are twofold: one is the interaction between carbides and dislocations, and the other is the synergistic strengthening effect between carbides and Re. The objective of this work was to enhance the comprehension on W-Re alloys and provide future research directions for W-Re alloys.
钨铼合金是最重要的难熔材料之一，具有优异的高温性能，其开发目的是改善钨的脆性。在本工作中，我们首先总结了钨铼合金制备和强化方法的研究进展。然后，讨论了钨铼合金的强化机制，包括铼的影响、固溶强化、第二相强化和细晶强化。结果表明，铼的软化作用主要与择优滑移面的转变和额外d价电子的引入有关。一些过渡元素和难熔金属元素有效地强化了钨铼合金。碳化物可显著提高钨铼合金的高温力学性能，原因有二：一是碳化物与位错之间的相互作用，二是碳化物与铼之间的协同强化效应。本工作的目的是加深对钨铼合金的理解，并为钨铼合金提供未来的研究方向。
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