航空材料学报2024，Vol.44Issue(2)：125-132,8.DOI:10.11868/j.issn.1005-5053.2023.000203
基于EBM增材制造CoNi基高温合金组织与力学性能
Microstructures and mechanical properties of AMed CoNi-base superalloy based on EBM
摘要
Abstract
Additive manufacturing provides a new way to develop high-performance superalloys and components.A γ′-strengthened CoNi-base superalloy suitable for additive manufacturing was developed,and a crack-free block material was prepared by optimizing the parameters of electron beam melting(EBM)technology.The experimental results show that the lowest porosity of the alloy is about 0.14%when the scanning speed is 2000 mm/s.The microstructures of the as-printed CoNi-base alloy are columnar grains growing along the<001>direction,the average grain width is about 235 μm,and the volume fraction of γ′phase is about 30%.After hot isostatic pressing and solution aging treatment,the porosity of the alloy is further reduced to about 0.09%with unobvious change of columnar grains.The average size of γ′ phases is about(70±18)nm with the volume fraction of about(32±3.6)%.The results of room temperature tensile tests show that the additive manufactured γʹ-strengthened CoNi-base superalloy exhibits excellent strength and ductility,showing a good potential of industrial application.关键词
CoNi基高温合金/增材制造/裂纹敏感性/显微组织/力学性能Key words
CoNi-based superalloy/additive manufacturing/cracking susceptibility/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
李龙飞,喻遥,闫春雷,冯强..基于EBM增材制造CoNi基高温合金组织与力学性能[J].航空材料学报,2024,44(2):125-132,8.基金项目
国家重点研发计划项目课题(2022YFB3707104) （2022YFB3707104）
国家自然科学基金(92060113) （92060113）
