文章摘要
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
  
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)
Author NameAffiliation
ZHOU Peng Analytical & Testing Center, Wuhan 430074, China 
LI Ke-ran State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 
HU Fei State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 
SHI Tian-jiao State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 
GONG Pan State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 
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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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