机电工程技术2024，Vol.53Issue(7)：8-12,17,6.DOI:10.3969/j.issn.1009-9492.2024.07.002
基于超声强化改性研磨时长的AlCoCrFeNi2.1共晶高熵合金组织和力学性能影响研究
Study on the Influence of Ultrasonic Strengthening and Modified Grinding Time on the Structure and Mechanical Properties of AlCoCrFeNi2.1 Eutectic High Entropy Alloy
摘要
Abstract
To improve the ultimate tensile strength and ductility of AlCoCrFeNi2.1 eutectic high entropy alloys(EHEAs)at room temperature,microstructure of the cross-section is observed with light microscope,microhardness of the cross-section is measured with a Vickers microhardness tester,surface three-dimensional morphology is analyzed with a white light interferometer,and room temperature uniaxial tensile testing is conducted on a tensile testing machine to draw engineering stress-strain curves.Scanning electron microscopy is used to analyze the fracture morphology and other instruments to study the changes in microstructure and properties of AlCoCrFeNi2.1 EHEAs under the treatment of ultrasonic strengthening and modified grinding(USG)at different durations(3,6,9 min).Results show that,compared with the base material,AlCoCrFeNi2.1 EHEAs USG treatment has a maximum thickness of about 120 μm from the outer surface to the core;the surface three-dimensional morphology firstly increases to 1.987 μm then reduces to 1.490 μm;the surface microhardness increased by a maximum of 30.40%,the ultimate tensile strength increased by a maximum of 25%,and the ductility increased by a maximum of 15.04%;the surface fracture morphology of the base material is characterized by ductile fracture;after USG,the fracture morphology of the sample is characterized by a mixed ductile brittle fracture.Conclusion can be drawn that USG can effectively improve the surface hardness and grain refinement of AlCoCrFeNi2.1 EHEAs,thereby synergistically enhancing its ultimate tensile strength and ductility.关键词
AlCoCrFeNi2.1EHEAs/超声强化改性研磨/极限拉伸强度/延展性/显微组织Key words
AlCoCrFeNi2.1EHEAs/ultrasonic strengthening and modified grinding/ultimate tensile strength/ductility/microscopic structure分类
矿业与冶金引用本文复制引用
殷浚彬,梁忠伟,刘朝阳,张博森,唐荟,谢智铭..基于超声强化改性研磨时长的AlCoCrFeNi2.1共晶高熵合金组织和力学性能影响研究[J].机电工程技术,2024,53(7):8-12,17,6.基金项目
国家重点研发计划项目(2023YFD2101004) （2023YFD2101004）
广东省自然科学基金资助项目(2023A1515011723) （2023A1515011723）
中国高校产学研创新基金(2023KY017) （2023KY017）
广东省高校重点领域专项(2023ZDZX3016) （2023ZDZX3016）
广州高校产学研重点项目(202235139) （202235139）
广州市基础与应用基础研究项目(2023A04J1007) （2023A04J1007）
广州市校(院)企联合资助项目(2023A03J0077) （院）
