Vacuum brazing of TiAl based alloy to 40Cr steel has been carried out at 1173 K for 0·5–40 min using Ag–Cu–Ti filler metal. The microstructural analyses indicate that three reaction products, Ti (Cu,Al)2, an Ag based solid solution (Ag(s.s.)), and TiC, are present in the brazing seam, and the interfacial structure of the brazed joint is TiAl/Ti(Cu,Al)2 + Ag(s.s.)/Ag(s.s.) + Ti(Cu,Al)2/TiC/40Cr. The experimental results show that the shear strength of the brazed TiAl/40Cr joints decreases as the brazing time increases, and it is up to 175 MPa when the joint is brazed at 1173 K for less than 2 min.
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References
1.
HOLMQUISTM., RECINAV., OCKBORNJ., and PETTERSSONB.: SCr. Mater., 1998, 39, 1101–1106.
2.
LiuH. J. and FENGJ. C.: China Weld., 2000, 9, (2), 116–120.
3.
LauH. J., FENGJ. C., and QIANY. Y.: J. Mater. Sci. Lett., 2000, 19, 1241–1242.
WICKMANH. A. and CHINE. S. C.: Proc. Conf. on ‘Gamma titanium aluminides’, Las Vegas, NV, USA, February 1995, (ed.KimY. W. et al), 627-634; 1995, Warrendale, PA, TMS.
6.
JTJNGLINGT., KIEBACKB., GLATZW., and CLEMENSH.: Proc. Conf. on ‘Gamma titanium aluminides’, Las Vegas, NV, USA, February 1995, (ed.KimY. W. et al), 627-634; 1995, Warrendale, PA, TMS.
7.
SETOS., MATSUMOTOK., MASUYAMAT., and HIROSHIMAM.: Q. J. Jpn Weld Soc., 1998, 16, (1), 59–65.
8.
NODAT., SHIMIZUT., OKABEM., and IIKUBOT.: Mater. Sci. Eng. A, 1997, A239-240,613–618.
9.
VILLARSP., PRINCEA., and OKAMOTOH.: ‘Handbook of ternary alloy phase diagrams’, 3372–3373; 1995, Materials Park, OH, ASM International.
