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- W2079811327 abstract "Abstract C103 and Ti–6Al–4V alloys jointed with Ti–15Cu–15Ni (wt.%) commercial brazing foil by vacuum-furnace brazing were investigated. Our previous study [I.-T. Hong, C.-H. Koo, Mater. Sci. Eng. A 398 (2005) 113] demonstrated that Ti–15Cu–15Ni (wt.%) filler-metal can successfully braze C103 and Ti–6Al–4V alloys, and identified all phases in the joint interface. The relationship between the microstructure and the joint performance, and the solidification process of the liquid filler-metal in the joint interface were also studied in detail. Therefore, the current study mainly focuses on how to further improve the microstructure and mechanical properties of the C103/TiCuNi/Ti–6Al–4V joint via post-brazing treatments or using various joint designs, such as overlap-length of joints, surface roughness of the parent-metals and joint clearance. Moreover, the high temperature shear strength of the C103/TiCuNi/Ti–6Al–4V joint was investigated to evaluate its limit service temperature. The experimental results reveal that the fracture load of joint reaches a maximum of 31,076 N, and the joint fractures in C103 parent-metal when the overlap-length of the joint increases to 3.5 times the thickness of the parent-metal (3.5T, 7 mm). However, the joint shear strength decreases with the overlap-length of the joint because of the non-uniform stress distribution in the lap joint during shear test. Post-brazing treatment at 880 °C for 4 h increases the shear strength of the joint brazed at 960 °C for 15 min by 16%, from 352 to 411 MPa. However, prolonging the post-brazing time to 6 h reduces the shear strength of the joint to 299 MPa. A comparison with the coarse Widmanstatten structure reveals that the presence of some fine Widmanstatten structure that forms in the joint interface during post-brazing treatment does not seem to deteriorate the joint shear strength. Moreover, the shear strength of joints decreases as the surface roughness of parent-metals decreases or the joint clearance increases. The results of the high temperature shear test reveal that the shear strength of the C103/TiCuNi/Ti–6Al–4V joint maintains at around 300 MPa at the test temperature below 600 °C. However, as the test temperature exceeds 600 °C, the shear strength of C103/TiCuNi/Ti–6Al–4V joint declines greatly." @default.
- W2079811327 created "2016-06-24" @default.
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- W2079811327 date "2005-11-01" @default.
- W2079811327 modified "2023-09-24" @default.
- W2079811327 title "The study of vacuum-furnace brazing of C103 and Ti–6Al–4V using Ti–15Cu–15Ni foil" @default.
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- W2079811327 doi "https://doi.org/10.1016/j.matchemphys.2005.04.021" @default.
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