Joining of TiAl and steels by induction brazing

Interfacial Reaction between Ti-Al Binary Alloys and High Carbon Steel

“…Joining, which is a fundamental and indispensable technique, has also been examined for the effective utilization of Ti-Al. TiAl has been joined to itself and other materials by various joining methods, such as diffusion bonding, [1][2][3][4][5] brazing, 6) friction welding, 7) and electron beam welding. 8) In each case, it is important to avoid the formation of brittle phases and defects and to relieve thermal stress at the interface, since these are vital to achieving good bonding characteristics.…”

Induction Brazing of γ-TiAl to Alloy Steel AISI 4140 Using Filler Metal of Eutectic Ag-Cu Alloy Coated with Ti Film

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] However, they suffer from low ductility and toughness at ambient temperatures which, along with poor formability, appears to be the most serious obstacle to their full utilization. 14) Therefore, technology developments in alloy design, processing, surface modification and joining are very important in the expansion of applications of TiAl.…”

“…Especially, the successful joining of TiAl to structural steels can contribute to the excellent wear resistance and toughness of components. 13,17) The joining of TiAl-based intermetallics has been successfully performed by fusion welding, [3][4][5] friction welding, 6,7) diffusion bonding [8][9][10][11] and brazing. [12][13][14][15][16][17] Patterson et al reported that the joining of TiAl using electron beam welding produced welding cracks in the joints due to rapid cooling.…”

“…12) Noda et al reported that TiAl to steel joints with a tensile strength of 320 MPa were successfully achieved by induction brazing. 13) Friction welding of TiAl/ AISI 4140 was studied by Lee et al who reported that welding cracks degraded mechanical properties due to the formation of brittle martensite, but that crack could be prevented by using ductile Cu as an intermediate layer. 6) Xuan reported that the friction welding of TiAl/steel using iron-based insert metal could achieve a joint strength of 412 MPa.…”

“…Diffusion bonding, 11) friction welding 6) and brazing 13) were investigated to join TiAl to steels. However, the long processing time and the high operational costs narrow the practical application fields of the diffusion bonding, despite the good joint properties that this method produces.…”