聊城大学学报（自然科学版）2024，Vol.37Issue(1)：62-69,8.DOI:10.19728/j.issn1672-6634.2023010008
AlCrFeMoSix高熵合金的显微组织和性能研究
Study on the Microstructure and Properties of AlCrFeMoSix High Entropy Alloys
摘要
Abstract
AlCrFeMo and AlCrFeMoSix high entropy alloys were prepared by non-consumable vacuum arc melting method.The effect of Si addition on the microstructure and properties of AlCrFeMo high entropy alloys were studied using X-ray diffraction,scanning electron microscopy,micro-hardness tester and elec-trochemical measurement system.The results showed that the phase composition of AlCrFeMo high en-tropy alloys changed from single BCC1 phase to dual-phases(BCC1 and BCC2)after Si addition and a small amount of intermetallic compounds(Cr5Si3 and Mo3Si)was also detected.This was because Si ele-ment not only promoted the formation of BCC phase,but also facilitated the presence of silicides due to the high negative mixing enthalpy between Si and metal elements.Meanwhile,the AlCrFeMoSix high entropy alloy developed a dendritic and lamellar mixed structure.As a result of second phase strengthening,grain-boundary strengthening and solid solution strengthening caused by Si atoms,the hardness of AlCrFeMoSix high entropy alloys increased from 394 HV to 549 HV.Besides,the potential difference among mixed structures brought about a serious galvanic corrosion on the alloy surface.Therefore,the corrosion current density of AlCrFeMoSix high entropy alloys increased from 1.71 × 10-8 to 5.54 × 10-8 A/cm2.关键词
高熵合金/Si元素/显微组织/硬度/腐蚀行为Key words
high entropy alloys/Si element/microstructure/hardness/corrosion behavior分类
矿业与冶金引用本文复制引用
郝雪卉,齐明洋,李学军,刘文阁,张娣,战艳虎,王长征..AlCrFeMoSix高熵合金的显微组织和性能研究[J].聊城大学学报（自然科学版）,2024,37(1):62-69,8.基金项目
国家自然科学基金项目(52103054) （52103054）
山东省自然科学基金项目(ZR2020QE026) （ZR2020QE026）
聊城大学大学生创新创业训练计划项目(CXCY2021186)资助 （CXCY2021186）
