Laser additive manufacturing of TA15 - Inconel 718 bimetallic structure via Nb/Cu multi-interlayer

Shang, Chun; Wang, Chenyang; Xu, Guangming; Li, Changfu; You, Jinyuan

doi:10.1016/j.vacuum.2019.108888

Cited by 35 publications

(10 citation statements)

References 22 publications

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“…Bobbio et al [14] used the directed energy deposition (DED) to form linearly graded Ti-6Al-4V/Invar 36 FGM; however, the samples prepared in his work had macroscopic cracks, which were assumed to be caused by the mismatches of the secondary phases in thermal expansion and elastic modulus. Shang et al [15] fabricated a TA15-Inconel 718 bimetallic structure via Nb/Cu multi-interlayers via laser additive manufacturing, and reported that Ti, Nb, Cu, and Ni elements diffused due to the heat effect of the laser and high-temperature gradient during the deposition process, which effectively prevented the formation of brittle phases while also strengthening the metallurgical bonds between both alloys.…”

Section: Introductionmentioning

confidence: 99%

Formation Mechanism of Dilute Region and Microstructure Evolution in Laser Solid Forming TA15/Ti2AlNb Dual Alloy

Tan

Zhu

et al. 2020

Materials

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TA15/Ti2AlNb multiple-layer samples and a dual-alloy sample were fabricated by laser solid forming (LSF) in this study. The formation mechanism of the dilute region and microstructure evolution of the dual alloy were analyzed. The results confirmed a “step” distribution of the composition among several initial layers in the multiple-layer samples, which can be explained by calculating the ratio of the remelted zone to the deposited Ti2AlNb zone in each deposited layer. However, the “step” compositional distribution disappears, and the compositional variation tends to be more continuous and smooth in the TA15/Ti2AlNb dual-alloy sample, which is attributed to alloy elements’ diffusion at the subsequent multiple re-melting and the longer thermal cycle. The macrostructure of the TA15/Ti2AlNb dual-alloy sample consists of epitaxially grown columnar prior β grains at the TA15 side and equiaxed grains at the Ti2AlNb side, while the microstructure shows a transition of α+β→α+α2+β/B2→α2+β/B2→α2+B2+O with increasing amounts of Ti2AlNb, leading to the microhardness also changing significantly.

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Section: Introductionmentioning

confidence: 99%

Formation Mechanism of Dilute Region and Microstructure Evolution in Laser Solid Forming TA15/Ti2AlNb Dual Alloy

Tan

Zhu

et al. 2020

Materials

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“…The formation of Ti–Ni IMCs was inhibited successfully. In order to limit the formation of brittle phases, the Nb/Cu composite transition layer [15] and Ta/Cu composite transition layer [16] were selected with the same thickness (about 2.0 mm) by LDM. The results showed that the Ti–Ni brittle phase was inhibited and the bimetallic structure without metallurgical defects was obtained.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the Ti–Ni brittle phase was inhibited and the bimetallic structure without metallurgical defects was obtained. The tensile strength of the Ta/Cu transition layer [16] was higher (about 369 MPa) compared to the Nb/Cu transition layer [15]. Therefore, Ta/Cu is an ideal material for the transition layer of the titanium and nickel-based alloy bimetallic structure.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Xing

et al. 2023

Science and Technology of Welding and Joining

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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.

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“…Lightweight is a vital assessment index in the selection of materials in the aerospace field [1][2][3]. Titanium alloys and aluminum alloys have become the primary structural materials in the aerospace field due to their characteristics of lightweight and high strength [4,5]. Their composite components combine the respective advantages of the two materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of transition zone in laser additive manufacturing of TC4/AlSi12 bimetal structure

Jing

Liu²,

Wang

et al. 2022

Mater. Res. Express

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Ti/Al bimetallic structure (BS) has a good development prospect and broader application potential in aerospace engineering. Considering the limitation that dissimilar welding is only applicable to the thin plate, it is necessary to explore a new manufacturing process for Ti/Al BS. In this study, a TC4/AlSi12 BS was prepared by laser additive manufacturing (LAM). TC4 zone, AlSi12 zone and transition zone were formed in the LAM process. Due to the sufficient diffusion reaction, the transition zone with a width of about 0.8mm was obtained. At the same time, a few micro-cracks were found in the transition zone. The microstructure and phase composition of the transition zone had been emphatically studied. Research results showed that the presence of Si element made the phase composition of the transition zone more complicated. The structure evolution from TC4 to AlSi12 was: α-Ti → Ti3Al → TiAl+(TiAl+Si) → Ti5Si3 → TiAl3+(α-Al+Si) → α-Al+ Si +TiAl3 +(α-Al+Si) → α-Al+Si+(α-Al+Si). The hardness distribution of BS was uneven, with the highest value reaching 524HV. The tensile strength of the TC4/AlSi12 BS was about 110Mpa, and the fracture location was located in the transition zone.

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Laser additive manufacturing of TA15 - Inconel 718 bimetallic structure via Nb/Cu multi-interlayer

Cited by 35 publications

References 22 publications

Formation Mechanism of Dilute Region and Microstructure Evolution in Laser Solid Forming TA15/Ti2AlNb Dual Alloy

Formation Mechanism of Dilute Region and Microstructure Evolution in Laser Solid Forming TA15/Ti2AlNb Dual Alloy

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

Microstructure and mechanical properties of transition zone in laser additive manufacturing of TC4/AlSi12 bimetal structure

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