首页>
外文期刊>DVS-Berichte
>The effects of Ag-based fillers' Ti content and elasto-plastic properties on the mechanical behavior of Nb-interlayer inserted Ti-6Al-4V/Si_3N_4 joint
【24h】
The effects of Ag-based fillers' Ti content and elasto-plastic properties on the mechanical behavior of Nb-interlayer inserted Ti-6Al-4V/Si_3N_4 joint
展开▼
机译：The effects of Ag-based fillers' Ti content and elasto-plastic properties on the mechanical behavior of Nb-interlayer inserted Ti-6Al-4V/Si_3N_4 joint
To enhance the interfacial bonding and residual-stress relaxation in Nb/Si_3N_4 side of Nb-interlayer inserted Ti-6Al- 4V/Si_3N_4 joint, the effects of filler's Ti content and elasto-plastic properties on the mechanical behavior of were investigated by brazing with CUSIL-ABA (63Ag-35.25Cu-1.75Ti wt.) and SILVER-ABA (92.25Ag-5Cu-1Al-1.25Ti wt.) fillers. Prior to brazing Nb/Si_3N_4 side, transient-liquid-phase bonding of Ti-6Al-4V/Nb side was first conducted with pure Cu and Ni as filler to eliminate brittle intermetallics. Although finite element analysis shows that SILVERABA promotes residual-stress relaxation more effectively attributed to its higher plastic deformability, 1.25 wt. Ti in 50-μm SILVER-ABA is insufficient to promote sound interfacial bonding with ceramics due to thin Ti-Si-N reaction layer (RL) and attained lower strength compared to brazing with 50-μm CUSIL-ABA. A countermeasure for strength optimization has been proposed to promote thicker RL on ceramics without increasing the brazing temeprature or prolonging holding time to minimize evaporation of Ag under vacuum; brazing with 100-μm SILVER-ABA increases the total Ti content and promotes thicker RL with strength higher than joint brazed with 50-μm CUSILABA.
展开▼
