有色金属材料与工程2024，Vol.45Issue(3)：1-8,8.DOI:10.13258/j.cnki.nmme.20240402002
变形量对(CoNiV)97Al3中熵合金组织和力学性能的影响
Effect of deformation on microstructure and mechanical properties of(CoNiV)97Al3 medium entropy alloy
摘要
Abstract
Compared with traditional alloys,medium entropy alloys with excellent properties such as high strength and high plasticity can satisfy more practical applications.In this paper,the mechanical properties of CoNiV alloy were improved by adding small amounts of Al into the alloy and annealing at different temperatures.As-cast(CoNiV)100-xAlx(x=1,2,3,4,5 atom fraction/%)alloys with different Al content were prepared.Using a universal testing machine,Vickers hardness tester,X-ray diffractometer,optical microscope,scanning electron microscope,transmission electron microscope,the effects of annealing temperature,Al content and tensile deformation on mechanical properties and microstructure of the alloy were studied.The results show that with the increase of Al content,the tensile elongation of the alloy increases to more than 30%,and the Vickers hardness increases from 755.8 down to 375.6.After annealed at 1 000℃,the alloy reaches a higher strength-plasticity equilibrium,the elongation can reach more than 35%,and the tensile yield strength is higher(more than 950 MPa).In this experiment,the(CoNiV)97Al3(Al3)was selected as the research object.The effects of tensile deformation(50%,100%)on the microstructure and mechanical properties of Al3 alloy were systematically analyzed.During the tensile deformation of Al3 alloy,the dislocation slip dominates the deformation,and the twins increase the dislocation storage and promote the dislocation slip accumulation.关键词
中熵合金/热处理/变形量/微观组织/力学性能Key words
medium entropy alloy/heat treatment/deformation/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
程军..变形量对(CoNiV)97Al3中熵合金组织和力学性能的影响[J].有色金属材料与工程,2024,45(3):1-8,8.基金项目
国家自然科学基金资助项目(52271249) （52271249）
陕西省重点研发计划资助项目(2023-YBGY-488) （2023-YBGY-488）
