High-mass-proportion TiCp/Ti6Al4V titanium matrix composites prepared by directed energy deposition

Ma, Guangyi; Yu, Chao; Tang, Bokai; Li, Yang; Niu, Fangyong; Wu, Dongjiang; Bi, Guijun; Liu, Shibo

doi:10.1016/j.addma.2020.101323

Cited by 22 publications

(6 citation statements)

References 50 publications

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“…Excessive ultrasonic vibrations create the cavitation effect to produce more energy for coatings, slowing the cooling rate of the molten pool for sufficient grain growth in the molten pool. The strengthening of fine grains disappears under the Ostwald Ripening effect [ 34 ]. Coarse grains develop to reduce coating hardness.…”

Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

et al. 2023

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This paper aims to explore the mechanism of an ultrasonic applied field on the microstructures and properties of coatings, and clarify the evolution of the molten pool under different ultrasonic frequencies. The Taguchi experimental design method was adopted in this paper. NbC-reinforced Ni-based coatings were in situ synthesized by laser cladding to investigate the effects of ultrasonic vibration process parameters on the microstructure, pore area, microhardness, and wear resistance of the cladding layer. The results show that the pore area decreases first and then increases as ultrasonic power increases from 600 to 900 W and ultrasonic frequency from 23 to 40 kHz. On the contrary, the hardness and wear resistance increase at first and then decrease. The pore area is minimized at 800 W ultrasonic power and 32 kHz ultrasonic frequency, and the hardness is maximized at 600 W ultrasonic power and 40 kHz ultrasonic frequency. Meanwhile, the highest wear resistance can be obtained when ultrasonic power is 700 W and ultrasonic frequency is 32 kHz. Based on the phase structure analysis, the cladding layer mainly consists of FeNi3, NbC, B4C, and CrB2. Ultrasonic vibration will not change the phase composition of the layer. Combined with the varying G/R value and cooling rate, the reasons for the change in grain morphology in different areas were analyzed to reveal the evolution mechanism of the molten pool under the influence of ultrasound.

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Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

et al. 2023

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“…The as-calculated σ Y of UNTi5 and UNTi10 was very close to the measured values. Figure 18(b) shows the comparison of GLSTi composites with other TMCs [59][60][61] and partially additively manufactured Ti6Al4V [62], and enhanced performance could be found with various distributions.…”

Section: Influences Of Nitrogen On Mechanical Propertiesmentioning

confidence: 99%

In-situ additive manufacturing of high strength yet ductility titanium composites with gradient layered structure using N₂

Xiao,

Song,

Liu

et al. 2024

Int. J. Extrem. Manuf.

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It has always been challenging work to reconcile the contradiction between the strength and plasticity of titanium materials. Laser powder bed fusion (LPBF) is a convenient method to fabricate innovative composites including those inspired by gradient layered materials. In this work, we used LPBF to selectively prepare TiN/Ti gradient layered structure (GLSTi) composites by using different N2-Ar ratios during the LPBF process. We systematically investigated the mechanisms of in-situ synthesis TiN, high strength and ductility of GLSTi composites using microscopic analysis, TEM characterization, and tensile testing with digital image correlation. Besides, a digital correspondence was established between the N2 concentration and the volume fraction of LPBF in-situ synthesized TiN. Our results show that the GLSTi composites exhibit superior mechanical properties compared to pure titanium fabricated by LPBF under pure Ar. Specifically, the tensile strength of GLSTi was more than 1.5 times higher than that of LPBF-formed pure titanium, reaching up to 1100 MPa, while maintaining a high elongation at fracture of 17%. GLSTi breaks the bottleneck of high strength but low ductility exhibited by conventional nanoceramic particle-strengthened titanium matrix composites, and the hetero-deformation induced strengthening effect formed by the TiN/Ti layered structure explained its strength-plasticity balanced principle. The microhardness exhibits a jagged variation of the relatively low hardness of 245 HV0.2 for the pure titanium layer and a high hardness of 408 HV0.2 for the N2 in-situ synthesis layer. Our study provides a new concept for the structure-performance digital customization of 3D-printed Ti-based composites.

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“…This phenomenon is attributed to the superior densification of ball-milled TiC/Ti powder during the LPBF process. Ma et al [286] fabricated TiC/Ti composites with TiC content ranging from 10 wt% to 50 wt% using ball-milled TiC/Ti powder and the DED process. The TiC particle and α-Ti matrix show a semi-coherent interface with the orientation relationships of TiC (figure 9).…”

Section: Titanium Matrix Composites (Tmcs)mentioning

confidence: 99%

An overview of additively manufactured metal matrix composites: preparation, performance, and challenge

Chen,

Qin,

Zhang

et al. 2024

Int. J. Extrem. Manuf.

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Metal matrix composites (MMCs) are frequently employed in various advanced industries due to their high modulus and strength, favorable wear and corrosion resistance, and other good properties at elevated temperatures. In recent decades, additive manufacturing (AM) technology has garnered attention as a potential way for fabricating MMCs. This article provides a comprehensive review of recent endeavors and progress in additive manufacturing of MMCs, encompassing available AM technologies, types of reinforcements, feedstock preparation, synthesis principles during the AM process, typical AM-produced MMCs, strengthening mechanisms, challenges and future interests. Compared to conventionally manufactured MMCs, AM-produced MMCs exhibit more uniformly distributed reinforcements and refined microstructure, resulting in comparable or even better mechanical properties. In addition, AM technology can produce bulk MMCs with significantly low porosity and fabricate geometrically complex MMC components and MMC lattice structures. As reviewed, many AM-produced MMCs, such as Al matrix composites, Ti matrix composites, Nickel matrix composites, Fe matrix composites, etc., have been successfully produced. The types and contents of reinforcements strongly influence the properties of AM-produced MMCs, the choice of AM technology, and the applied processing parameters. In these MMCs, four primary strengthening mechanisms have been identified: Hall-Petch strengthening, dislocation strengthening, load transfer strengthening, and Orowan strengthening. AM technologies offer advantages that enhance the properties of MMCs when compared with traditional fabrication methods. Despite the advantages above, further challenges of AM-produced MMCs are still faced, such as new methods and new technologies for investigating AM-produced MMCs, the intrinsic nature of MMCs coupled with AM technologies, and challenges in the AM processes. Therefore, the article concludes by discussing the challenges and future interests of additive manufacturing of MMCs.

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High-mass-proportion TiCp/Ti6Al4V titanium matrix composites prepared by directed energy deposition

Cited by 22 publications

References 50 publications

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

In-situ additive manufacturing of high strength yet ductility titanium composites with gradient layered structure using N₂

An overview of additively manufactured metal matrix composites: preparation, performance, and challenge

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High-mass-proportion TiCp/Ti6Al4V titanium matrix composites prepared by directed energy deposition

Cited by 22 publications

References 50 publications

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

Microstructures and Properties of NbC-Reinforced Ni-Based Coatings Synthesized In Situ by Ultrasonic Vibration-Assisted Laser Cladding

In-situ additive manufacturing of high strength yet ductility titanium composites with gradient layered structure using N2

An overview of additively manufactured metal matrix composites: preparation, performance, and challenge

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Product

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In-situ additive manufacturing of high strength yet ductility titanium composites with gradient layered structure using N₂