电焊机2025，Vol.55Issue(10)：13-21,28,10.DOI:10.7512/j.issn.1001-2303.2025.10.02
高熵钎料制备TiAl/Ni基高温合金接头中半共格界面的强化作用
Strengthening Effect of Semi-Coherent Interface on TiAl/Ni based Super-Alloy Brazing Joint Prepared by High Entropy Filler
摘要
Abstract
High-strength joining between TiAl and Ni-based superalloy was achieved by reactive brazing using a Ni5Zr5Sn4Cu2Hf2FeCr high-entropy filler.The differences in element properties within the high-entropy system promoted phase separation,while atomic radius compatibility facilitated the widespread formation of semi-coherent interfaces across the joint.The results indicate that these semi-coherent interfaces,through periodic misfit dislocations and their elastoplastic cooperative regulation,effectively relieve residual stresses at the interface,significantly enhancing the mechanical perfor-mance of the joint:the room-temperature shear strength approaches that of the TiAl substrate and remains high at 650 ℃.Atomic-scale simulations and radial distribution function(RDF)analyses further reveal that the thermodynamic separation tendency between Ni and Cr-Mo-Fe-rich phases drives the spontaneous formation of semi-coherent interfaces,providing a key mechanism for the stability of the weld microstructure.This study elucidates the critical role of semi-coherent interfaces in enhancing the performance of high-entropy brazed dissimilar alloy joints and offers new insights for microstructural de-sign in advanced structural material joining.关键词
TiAl合金/Ni基高温合金/高熵钎料/半共格界面/原子尺度模拟Key words
TiAl/Ni-based superalloy/high-entropy filler/semi-coherent interface/Atomic-scale simulation分类
矿业与冶金引用本文复制引用
李昕悦,傅孟春,林盼盼,林铁松,何鹏..高熵钎料制备TiAl/Ni基高温合金接头中半共格界面的强化作用[J].电焊机,2025,55(10):13-21,28,10.基金项目
国家自然科学基金项目(U21A20128,52175302,U22A20185,52305353) （U21A20128,52175302,U22A20185,52305353）
黑龙江省自然科学基金项目(YQ2024E020) （YQ2024E020）
