原子能科学技术2026，Vol.60Issue(1)：59-66,8.DOI:10.7538/yzk.2025.youxian.0399
热等静压对增材制造FeNiCrMnAl高熵合金组织及力学性能的影响
Influence of Hot Isostatic Pressing in Additive Manufacturing on Microstructure and Property of FeNiCrMnAl High-entropy Alloy
摘要
Abstract
This study systematically investigates the effects of hot isostatic pressing(HIP)post-treatment on the microstructure and mechanical properties of selective laser melting(SLM)-fabricated FeNiCrMnAl high-entropy alloy.The work aims to characterize HIP-induced microstructural changes and evaluate their influence on mechanical performance under both room temperature and elevated-temperature(300℃)conditions.The FeNiCrMnAl high-entropy alloy was fabricated using SLM technology.HIP treatment was subsequently applied to the as-built samples.Microstructural characterization was performed to analyze phase composition,grain morphology,and defect distribution.Mechanical properties were evaluated through tensile testing at room temperature and 300℃.Fracture surfaces were examined to determine failure mechanisms.HIP treatment effectively reduces void defects and improves densification in the SLM-fabricated alloy.The primary alloy phases and melt pool morphology remain unchanged after HIP processing.However,microstructural modifications occur,including grain coarsening and an increased proportion of low-angle grain boundaries.These changes lead to improved ductility,with the HIP-treated alloy exhibiting enhanced elongation compared to the as-built material.The fracture mechanism transitions from a mixed quasi-cleavage and ductile mode to predominantly ductile characteristics.The application of HIP post-processing to SLM-produced FeNiCrMnAl high-entropy alloy demonstrates significant benefits for mechanical performance.While preserving the primary phase composition,HIP treatment modifies the microstructure to enhance ductility and alter fracture behavior.These findings provide fundamental insights into the use of HIP technology for optimizing additively manufactured metallic components.The study establishes that HIP can effectively improve the properties of SLM-fabricated high-entropy alloys without altering their fundamental phase characteristics.关键词
增材制造/热等静压/高熵合金/性能调控Key words
additive manufacturing/hot isostatic pressing/high-entropy alloy/property regulation分类
能源科技引用本文复制引用
陈梦瑶,李晓泉,李伸,杨万欢,陈帅,彭德全,慎英才,杨文,钟巍华..热等静压对增材制造FeNiCrMnAl高熵合金组织及力学性能的影响[J].原子能科学技术,2026,60(1):59-66,8.基金项目
中国原子能科学研究院青年英才项目(YC020260424195) （YC020260424195）
中核集团菁英人才项目(FY020270624941) （FY020270624941）
国家原子能机构核材料技术创新中心项目(WDZC-2023-AW-0303) （WDZC-2023-AW-0303）
