TY - JOUR
T1 - Interfacial Microstructure Evolution and Mechanical Properties of TC4/MgAl2O4 Joints Brazed with Ti–Zr–Cu–Ni Filler Metal
AU - Song, Jiafen
AU - Guo, Wei
AU - Xu, Shiming
AU - Hao, Ding
AU - Du, Yajie
AU - Xiong, Jiangtao
AU - Li, Jinglong
N1 - Publisher Copyright:
© The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2024.
PY - 2024/12
Y1 - 2024/12
N2 - In the present study, Ti–Zr–Cu–Ni amorphous filler metal was used to braze MgAl2O4 ceramic and Ti–6Al–4V (TC4) at 875, 900, 925, 950, 975 and 1000 °C for 10 min. The effects of brazing temperature on interfacial microstructure and mechanical properties of the joints were analyzed. The results showed that typical microstructure of the TC4/MgAl2O4 joint was solid solution (SS) α-Ti, acicular α-Ti + (Ti, Zr)2(Ni, Cu) layer, metallic glasses and TiO. With the increase in brazing temperature, (Ti, Zr)2(Ni, Cu) layer gradually dispersed at bonding interface, a continuous layer of TiO appears near MgAl2O4 ceramic. With the increase in brazing temperature, the hard and brittle (Ti, Zr)2(Ni, Cu) layer gradually dispersed, resulting in the maximum shear strength of 39.5 MPa. The high-resolution TEM revealed the presence of amorphous structure, which is composed of Ti, Zr, Cu, Ni and Al. The values of δ and ΔHmix are calculated to be about 8% and −39.82 kJ/mol for the amorphous phase.
AB - In the present study, Ti–Zr–Cu–Ni amorphous filler metal was used to braze MgAl2O4 ceramic and Ti–6Al–4V (TC4) at 875, 900, 925, 950, 975 and 1000 °C for 10 min. The effects of brazing temperature on interfacial microstructure and mechanical properties of the joints were analyzed. The results showed that typical microstructure of the TC4/MgAl2O4 joint was solid solution (SS) α-Ti, acicular α-Ti + (Ti, Zr)2(Ni, Cu) layer, metallic glasses and TiO. With the increase in brazing temperature, (Ti, Zr)2(Ni, Cu) layer gradually dispersed at bonding interface, a continuous layer of TiO appears near MgAl2O4 ceramic. With the increase in brazing temperature, the hard and brittle (Ti, Zr)2(Ni, Cu) layer gradually dispersed, resulting in the maximum shear strength of 39.5 MPa. The high-resolution TEM revealed the presence of amorphous structure, which is composed of Ti, Zr, Cu, Ni and Al. The values of δ and ΔHmix are calculated to be about 8% and −39.82 kJ/mol for the amorphous phase.
KW - Brazing
KW - High-entropy metallic glasses
KW - MgAlO
KW - Microstructure
KW - TC4 titanium alloy
UR - https://www.scopus.com/pages/publications/85204105491
U2 - 10.1007/s40195-024-01761-6
DO - 10.1007/s40195-024-01761-6
M3 - 文章
AN - SCOPUS:85204105491
SN - 1006-7191
VL - 37
SP - 2057
EP - 2067
JO - Acta Metallurgica Sinica (English Letters)
JF - Acta Metallurgica Sinica (English Letters)
IS - 12
ER -