Ti、Cr、Zr、Hf元素对FeMnNiCu-X高熵合金微结构、相变和硬度的影响  

Effects of Ti,Cr,Zr and Hf on the Microstructure,Phase Transformation and Hardness of FeMnNiCu-X High Entropy Alloys

作　　者：冯苗 李维雅 赵春旺 FENG Miao;LI Weiya;ZHAO Chunwang(School of Science,Inner Mongolia University of Technology,Hohhot 010051,China;School of Materials and Energy,Foshan University,Foshan 528000,China)

机构地区：[1]内蒙古工业大学理学院,呼和浩特010051 [2]佛山大学材料与能源学院,广东佛山528000

出　　处：《内蒙古大学学报(自然科学版)》2025年第1期37-44,共8页Journal of Inner Mongolia University:Natural Science Edition

基　　金：国家自然科学基金项目(51261017);内蒙古高等学校科学研究项目(NJZY20080);内蒙古工业大学科学研究项目(BS201931)。

摘　　要：研究了FeMnNiCu、FeMnNiCuTi、FeMnNiCuCr、FeMnNiCuZr、FeMnNiCuHf多组元高熵合金的微观组织结构、相变及硬度。结果表明:五组合金呈现双相/多相固溶体,均有面心立方(FCC)结构产生,FeMnNiCu、FeMnNiCuTi、FeMnNiCuZr、FeMnNiCuHf四组合金均呈现枝晶状结构,FeMnNiCuCr合金呈现岛屿状结构,五组合金组织成分偏析严重,Cu元素具有较强的偏析倾向。合金具有较大的硬度,其硬度与组织结构密切相关,且均与添加元素原子半径成正比。FeMnNiCu、FeMnNiCuTi、FeMnNiCuCr三组合金相变温度位于1050℃左右,FeMnNiCuZr、FeMnNiCuHf合金相变温度位于900℃左右。The microstructure,phase transformation and hardness of FeMnNiCu,FeMnNiCuTi,FeMnNiCuCr,FeMnNiCuZr and FeMnNiCuHf multi-component high-entropy alloys were studied.The results show that the five-combination alloys exhibit a dual-phase/multi-phase solid solution,and all have a face-centered cubic(FCC)structure.The four-combination alloys of FeMnNiCu,FeMnNiCuTi,FeMnNiCuZr,and FeMnNiCuHf all exhibit a dendritic structure.The FeMnNiCuCr alloy exhibits an island structure.The composition segregation of the five-combination alloys are serious,and the Cu element has a strong segregation tendency.The alloy has a large hardness,and its hardness is closely related to the microstructure,and is proportional to the atomic radius of the added element.The phase transition temperatures of FeMnNiCu,FeMnNiCuTi and FeMnNiCuCr alloys are about 1050℃,and the phase transition temperatures of FeMnNiCuZr and FeMnNiCuHf alloys are about 900℃.

关 键 词：高熵合金 微观结构 相变行为 维氏硬度 

分 类 号：O469[理学—凝聚态物理] TG139[理学—电子物理学]