HUAI Junfeng, SHANG Yonglai, REN Haishui, et al.Research on the Brazing Process and Joint Properties of Ti150/TC19 Dissimilar Titanium Alloys[J].Electric Welding Machine, 2022, 52(6): 93-98. DOI： 10.7512/j.issn.1001-2303.2022.06.11.
Research on the Brazing Process and Joint Properties of Ti150/TC19 Dissimilar Titanium Alloys
High temperature titanium alloy Ti150 was developed for the aero-engines with high thrust-weight ratio and with long-term service temperature of 600 ℃. TC19 is a two-phase (α+β) titanium alloy with high strength and toughness. The vacuum brazing process of the two titanium alloys was conducted using Ti-21Cu-13Zr-9Ni（,wt,.%）as filler metal. The joint microstructure and element distribution of joint were analyzed by means of SEM and EDS, meanwhile the tensile strength of the joint was measured at the room temperature and high temperatures by universal testing machine. The results showed that under the brazing condition of 930 ℃/35 min, the joint tensile strength at room temperature reached up to 955.3 MPa, and the strength of 540.0 MPa and 505.6 was maintained at 500 ℃ and 550 ℃, respectively. The tensile specimens at room temperature fractured within the brazed seam and the fractured surface exhibited brittle characteristics. The tensile specimens fractured within the Ti150 metal substrate when tested at 500 ℃ and 550 ℃, and plastic deformation was observed at the fractured surface.
Ti150 high temperature titanium alloyTC19dissimilar material connectionbrazingmechanical properties
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