Transient liquid phase bonding of carbon steel tubes using a Cu interlayer: Characterization and comparison with amorphous Fe-B-Si interlayer bonds

Tensile tests show that the joined tubes using Cu or Fe-B-Si interlayers failed away from the bond, at the HAZ, attaining almost the same ultimate tensile strength of the BM, in the as-received condition. Hardness profiles across the bonding zone are in agreement with the observed microstructures at the different zones of the bond region.