(TiZrHf)40(NiCu)55Al5高熵非晶钎料真空钎焊Ti2AlNb/GH4169合金
Vacuum brazing Ti2AlNb/GH4169 alloy with (TiZrHf)40(NiCu)55Al5 high-entropy amorphous filler metal
李鹏 1张振阳 1张亮亮 1马雄 2孙兵兵 3李超 1董红刚1
作者信息
- 1. 大连理工大学,材料科学与工程学院,大连,116024
- 2. 北京钢研高纳科技股份有限公司,北京,100081
- 3. 中国航发北京航空材料研究院,北京,100095
- 折叠
摘要
设计了一种高熵非晶钎料(TiZrHf)40(NiCu)55Al5 对Ti2AlNb合金与GH4169镍基高温合金进行真空钎焊,分析了钎焊工艺对Ti2AlNb合金/GH4169镍基高温合金接头界面组织形貌、力学性能及断裂行为的影响规律.结果表明,钎焊接头可划分为Ti2AlNb/等温凝固区(Ⅰ区)/钎缝中心区(Ⅱ区)/扩散反应区(Ⅲ区)/GH4169;钎焊接头典型界面组织为Ti2AlNb/B2+Ti2Ni(Al,Nb)/(Ti,Zr,Hf)(Ni,Cu)/(Ni,Cr,Fe,Ti)ss+Cr-rich(Ni,Cr,Fe)ss+Ni-rich(Ni,Cr,Fe)ss+(Ni,Cr,Fe)ss/GH4169;随钎焊温度升高和保温时间延长,钎焊接头的抗剪强度均呈现出先增大后减小的趋势,当钎焊温度为 1 020℃、钎焊时间为 15 min时,接头的抗剪强度达到最大 237 MPa.断口分析表明,接头主要断裂在Ti2Ni(Al,Nb)+(Ti,Zr,Hf)(Ni,Cu)+(Ni,Cr,Fe,Ti)ss处,并逐渐向扩散反应区扩展,断口形貌呈现出典型的解理断裂特征.
Abstract
A high-entropy amorphous brazing filler metal(TiZrHf)40(NiCu)55Al5 was designed for vacuum brazing of Ti2AlNb alloy and GH4169 nickel-based superalloy.The effects of brazing parameters on the interfacial microstructure,mechanical properties and fracture behavior of Ti2AlNb alloy/GH4169 nickel-based superalloy brazed joints were studied.The results showed that the brazed joints can be divided into Ti2AlNb/diffusion reaction zone(zone Ⅰ)/brazing seam center zone(zone Ⅱ)/diffusion reaction zone(zone Ⅲ)/GH4169.The typical interface microstructure of brazed joints was Ti2AlNb/B2+Ti2Ni(Al,Nb)/(Ti,Zr,Hf)(Ni,Cu)/(Ni,Cr,Fe,Ti)ss+Cr-rich(Ni,Cr,Fe)ss+Ni-rich(Ni,Cr,Fe)ss+(Ni,Cr,Fe)ss/GH4169.With the increase of brazing temperature and brazing time,the shear strength of brazed joints increased first and then decreased.When the brazing temperature was 1020℃and the brazing time was 15 min,the maximum shear strength of 237 MPa was obtained.The fracture analysis showed that the joint was mainly broken at zone of Ti2Ni(Al,Nb)+(Ti,Zr,Hf)(Ni,Cu)+(Ni,Cr,Fe,Ti)ss,and fracture path gradually expanded to the diffusion reaction zone.The fracture morphology showed typical cleavage fracture characteristics.
关键词
Ti2AlNb合金/GH4169镍基高温合金/真空钎焊/微观组织/抗剪强度Key words
Ti2AlNb alloy/GH4169 nickel-base superalloy/vacuum brazing/microstructure/shear strength引用本文复制引用
基金项目
国家重点研发计划项目(2023YFB3407500)
国家自然科学基金面上项目(52075074)
国家自然科学基金面上项目(52375313)
出版年
2024
NETL
NSTL
万方数据