Ta/Cu transition region in TC4/Inconel718 bimetallic structure fabricated by laser deposition manufacturing

Abstract

The bimetallic structure formed by TC4 and Inconel718 has broad potential applications in aerospace. Based on the laser deposition manufacturing technique, a TC4/Inconel718 bimetallic structure was fabricated via the Ta/Cu transition layer. The test results indicated that a Ta/Cu transition region with a width of 475.0 μm was formed. The microstructure of the transition region changed from a reticular to a rod structure, and the corresponding phase compositions were β-Ta + Ti 2 Cu + TiCu and TiCu+γ -Cu + Cr 2 Ta. Owing to the formation of Ti-Cu and Cr-Ta phases in the transition region, the Vickers hardness reached 444.0 HV. The ultimate tensile strength was 280 MPa, and the fracture morphology presented a quasi-cleavage fracture, which occurred in the Ta/Cu transition region where Ti-Cu brittle phases exist.

Recent progress in process, structure, properties, and performance in additive manufacturing

“…The special issue contains contributions on the major variants of AM including laser DED [6,9,18,24], gas metal arc DED [7,[10][11][12][13][14]16,19,[21][22][23], laser PBF [8], cold spray [17], laser-arc hybrid manufacturing [20], and fused deposition modelling [15]. Chaurasia et al [22] presented a novel approach to real-time monitoring of melt pool cross-sectional asymmetry during laser PBF using a two-color thermal camera.…”

“…The articles in the special issue cover a wide variety of alloys including Ti alloy [6][7][8][9], steels [11,13,14,18], Ni alloys [9,16,19], and Al alloys [10,12,23]. In addition, several new materials are discussed that were specially designed for AM.…”

“…Chenyang et al [9] studied the microstructure and properties of a bimetallic structure of TC4 and Inconel 718 for aerospace applications made by laser DED. The bimetallic structure was fabricated using a Ta/Cu transition layer.…”

“…This special issue includes all aforementioned trends of progress through 19 original research articles [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The editors of STWJ invited active researchers from the AM and welding communities to contribute to this special issue.…”

Assessing crack susceptibility in blended copper-stainless steel compositions during laser directed energy deposition-based additive manufacturing

“…1 One such combination of dissimilar materials is copper (Cu)-stainless steel (SS), which has wide applications in cryogenic, aerospace, tooling, vacuum, power generation, etc. 2,3 Cu-SS joint combines the excellent strength and corrosion resistance of SS and the thermal diffusivity of Cu in a single component. 3 In recent times, there has been a growing interest among research groups in Cu-SS joints considering its wide potential applications in the above-mentioned sectors.…”