铸造技术2026，Vol.47Issue(1)：39-49,11.DOI:10.16410/j.issn1000-8365.2026.5075
GH4099和GH3128异质高温合金TLP扩散焊接头组织与性能演化
Microstructural and Mechanical Property Evolution of GH4099 and GH3128 Dissimilar Superalloy Joints by TLP Diffusion Bonding
摘要
Abstract
In response to the urgent demand for highly reliable joining of heterogeneous nickel-based superalloys in aerospace applications,transient liquid phase diffusion welding(TLP)of dissimilar nickel-based superalloys GH4099 and GH3128 was studied.The influence of the bonding temperature on the microstructure and mechanical properties of the joints was systematically investigated,providing theoretical guidance for welding dissimilar materials.BNi-2 was used as an interlayer,and the joint microstructures were characterized via EBSD,EPMA,and SEM.Tensile tests were performed to evaluate the mechanical properties.The results indicate that with increasing bonding temperature,grain growth gradually occurs in the isothermal solidification zone(ISZ)and that the borides along the grain boundaries in the diffusion-affected zone(DAZ)change from a continuous to a discontinuous morphology.The joint bonded at 1 120℃exhibits the best mechanical performance,with an ultimate tensile strength of 953 MPa,equivalent to 117.1%of the GH3128 base metal.关键词
高温合金/BNi-2/TLP/界面组织演变/力学性能Key words
superalloys/BNi-2/TLP/interface microstructure evolution/mechanical properties分类
矿业与冶金引用本文复制引用
刘晓芸,郝定,巴特,熊江涛,李京龙..GH4099和GH3128异质高温合金TLP扩散焊接头组织与性能演化[J].铸造技术,2026,47(1):39-49,11.基金项目
国家自然科学基金面上项目(52475404) （52475404）
陕西省稀有金属装备制造共性技术研发平台(2024ZG-GXPT-02) （2024ZG-GXPT-02）
