Laser additive manufacturing of a 316L/CuSn10 multimaterial coaxial nozzle to alleviate spattering adhesion and burning effect in directed energy deposition

Liu, Linqing; Wang, Di; Deng, Guowei; Han, Changjun; Yang, Yongqiang; Chen, Jie; Chen, Xiexin; Liu, Yang; Bai, Yuchao

doi:10.1016/j.jmapro.2022.07.038

Cited by 17 publications

(5 citation statements)

References 34 publications

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“…However, reducing the trade-off between the strength and plasticity of TMCs is challenging by altering the components or microstructure of homogeneous materials using conventional alloy designs [23]. Laser powder bed fusion (LPBF) fabrication of CPTi with sub-microstructures requires the ability to predictably tailor the material composition, structure, and performance at arbitrarily spatial locations within the part [24]. Therefore, in order to realize material-structure-performance integrated additive manufacturing, it is necessary to further develop current LPBF technology.…”

Section: Introductionmentioning

confidence: 99%

“…LPBF forming composites or gradient materials has been explored. Chen et al [25] designed a gradient material LPBF equipment that enabled Z-direction printing of multi-material structures by letting the powder fall into different grooves of the powder spreading trolley to switch materials and used this equipment to verify the formation of directed energy deposition nozzles [24] for heterogeneous materials. Similarly, Wang et al [26] formed a Ti6Al4V/TiB 2 layer structure material using an LPBF machine with similar principles and obtained improved bending resistance.…”

Section: Introductionmentioning

confidence: 99%

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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.

Self Cite

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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.

Self Cite

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“…Laser Powder Bed Fusion (LPBF) exhibits superior quality and excellent mechanical properties, making it one of the most favored Additive Manufacturing (AM) processes for constructing porous [1], multi-material [2,3], and complex structure components [4], widely applied in aerospace, biomedical, automotive, among other fields. However, LPBF suffers from a high surface roughness and low dimensional accuracy, necessitating post-processing such as grinding, sandblasting, and polishing, that decreasing production efficiency and increasing manufacturing costs.…”

Section: Introductionmentioning

confidence: 99%

Study on additive and subtractive manufacturing using picosecond laser micromachining

Zheng,

Trofimov,

Yang

et al. 2024

Laser + Photonics for Advanced Manufacturing

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Laser powder bed fusion (LPBF) can rapidly manufacture the metal products with complex structures, but the high surface roughness and low dimensional accuracy limit the mechanical properties and application scenarios of powder bed process parts. Because in recent years, the ultrafast laser micromachining has shown great potential in the field of precision machining, it was combined with laser powder bed manufacturing. It means that after additive manufacturing samples, those were micromachined using ultrafast laser. In current study, a laser powder bed fusion device, equipped with a picosecond laser, is described, and a preliminary realization of additive and subtractive manufacturing based on pulsed laser processing using this device is presented. The side surface roughness of the samples fabricated by hybrid additive manufacturing process was lower than that of samples built LPBF technology. This study may provide a new way to manufacture parts with high dimension accuracy and low surface roughness by LPBF technology.

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“…Schmidt et al, [3] showed application of AM process by using laser beam in industry and academia. Powder bed fusion (PBF) and directed energy deposition (DED) have been commonly applied to produce the AMed metal products in the industry field [4,5]. In the PBF process, metal powders are selectively melted and re-solidified by scanning the laser beam or electron beam (EB), layer by layer.…”

Section: Introductionmentioning

confidence: 99%

Surface finishing and change in residual stress of AMed titanium alloy by combination of grit blasting and large-area EB irradiation

Shinonaga

Kobayashi²,

Okada³

et al. 2023

Preprint

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Additively manufactured (AMed) titanium products are typically produced by electron beam melting (EBM), since oxidation of titanium alloy surface can be suppressed in vacuum ambience. The surface roughness of AMed titanium products becomes more than 200µmRz, and the very rough surface would lead to reduction in surface strength. Therefore, a post surface finishing process is required. Abrasive blasting is one of the common surface smoothing processes of AMed metal products. Large surface roughness can be decreased, and compressive residual stress can be introduced to the surface. However, there is a limitation to reduction of surface roughness to several µmRz. On the other hand, it was recently found that AMed metal surface produced by powder bed fusion with laser beam could be smoothed by large-area electron beam (LEB) irradiation. However, it is difficult to smooth surface with large initial surface roughness, and a tensile residual stress may be generated on the surface. In this study, surface finishing and change in residual stress of AMed titanium alloy were proposed by combination of grit blasting and LEB irradiation. Surface roughness of AMed titanium alloy significantly decreases from 265µmRz to about 2.0µmRz by combination of grit blasting and LEB irradiation. Reduction rate of surface roughness by LEB irradiation linearly increases with decreasing mean width of blasted surface. Influence of the mean width on smoothing effect by LEB irradiation can be explained by thermo-fluid analysis. Moreover, tensile residual stress caused by LEB irradiation can be reduced when LEB is irradiated to blasted surface.

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Laser additive manufacturing of a 316L/CuSn10 multimaterial coaxial nozzle to alleviate spattering adhesion and burning effect in directed energy deposition

Cited by 17 publications

References 34 publications

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

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

Study on additive and subtractive manufacturing using picosecond laser micromachining

Surface finishing and change in residual stress of AMed titanium alloy by combination of grit blasting and large-area EB irradiation

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Laser additive manufacturing of a 316L/CuSn10 multimaterial coaxial nozzle to alleviate spattering adhesion and burning effect in directed energy deposition

Cited by 17 publications

References 34 publications

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

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

Study on additive and subtractive manufacturing using picosecond laser micromachining

Surface finishing and change in residual stress of AMed titanium alloy by combination of grit blasting and large-area EB irradiation

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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

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