周芃,李可然,胡飞,等.添加Be对CoCrFeNi高熵合金组织和性能影响的研究[J].精密成形工程,2022,14(12):41-49.
ZHOU Peng,LI Ke-ran,HU Fei,et al.Effect of Adding Be on Microstructure and Properties of CoCrFeNi High Entropy Alloy[J].Journal of Netshape Forming Engineering,2022,14(12):41-49. |
| 添加Be对CoCrFeNi高熵合金组织和性能影响的研究 |
| Effect of Adding Be on Microstructure and Properties of CoCrFeNi High Entropy Alloy |
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| DOI：10.3969/j.issn.1674-6457.2022.12.005 |
| 中文关键词: 高熵合金 Be元素添加 微观组织结构 力学性能 |
| 英文关键词: high entropy alloy Be addition microstructure mechanical property |
| 基金项目:武汉市知识创新专项?基础研究项目；国家自然科学基金（51601063） |
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| 摘要点击次数: 1790 |
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| 中文摘要: |
| 目的 研究CoCrFeNi高熵合金组织和性能在添加Be后的变化，通过高熵合金固溶体相形成规律，设计从面心立方固溶体转变至含体心立方及金属间化合物的(CoCrFeNi)1-xBex系列高熵合金。方法 通过计算验证(CoCrFeNi)1-xBex系列高熵合金的成分是否落入固溶体区域，并对上述成分高熵合金组织和力学性能进行研究。结果 Be元素的原子数分数为4%时，高熵合金仍为单一的FCC相结构，随着Be元素含量的进一步增加，基体中出现BCC相和金属间化合物。Be的添加使得(CoCrFeNi)1-xBex高熵合金的屈服强度及显微硬度均大大提高，同时密度降低。结论 根据相形成规律设计的(CoCrFeNi)1-xBex系列高熵合金表明，适量添加Be元素可以改善CoCrFeNi高熵合金的综合物理力学性能。 |
| 英文摘要: |
| The work aims to study the microstructure and properties of CoCrFeNi high entropy alloys (HEA) with Be addition. The (CoCrFeNi)1-xBex series of high entropy alloys were designed to transform from face-centered cubic solid solution to body-centered cubic and intermetallic compounds based on the formation law of high entropy alloy solid solution phase. The components of the (CoCrFeNi)1-xBex series high entropy alloys were calculated to verify whether they fell into the solid solution region, and the microstructure and mechanical properties of (CoCrFeNi)1-xBex series high entropy alloys were studied. When the content of Be was 4at.%, the HEAs had a single FCC phase structure. With the increase of Be content, BCC phase and intermetallic compounds appeared in the matrix. The yield strength and microhardness of (CoCrFeNi)1-xBex HEAs were increased and the density was decreased with the addition of Be. In summary, the addition of Be improved the comprehensive mechanical properties of CoCrFeNi HEA. |
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