Microstructures and mechanical properties of Nb nanoparticles modified Ni60 hard-facing alloy fabricated by laser metal deposition

Liu, Liang; Wang, Wenquan; Zhang, Xinge; Li, Xin; Tian, Yingtao; Zhao, Xiaohui

doi:10.1016/j.msea.2021.141238

Cited by 10 publications

(2 citation statements)

References 25 publications

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“…Due to the NiCrBSi alloys' complexity, all these phenomena must be considered. Indeed, the high boron content of NiCrBSi alloys might generate a liquid film between dendrites, leading to solidification cracking [80]. Many eutectic components can lead to liquation cracking [24,35].…”

Section: Cracksmentioning

confidence: 99%

Material Health of NiCrBSi Alloy Parts Produced via the Laser Powder Bed Fusion Process

Ty,

Balcaen,

Mokhtari

et al. 2023

Metals

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Laser powder bed fusion (L-PBF) is a novel process representing a possible solution for producing resistant parts using NiCrBSi hard-facing nickel alloys with complex geometry. Process parameters for more common alloys are explored with a standard Renishaw AM400 device (Renishaw, Wotton-under-Edge, UK) and an SLM Solution 250 device (SLM Solutions Group AG, Lübeck, Germany) modified with a baseplate preheated at high temperatures (300 °C and 500 °C). Laser remelting is also investigated in hopes of further improving material health. The origin of the main defects is studied. A lack of fusion is likely to be generated by spatters ejected from the melting pool while cracks are induced by the alloy’s lack of toughness. Using image analyses, those defects are quantified and correlated with processing parameters. Lack of fusion and total crack length decrease with an increase in baseplate’s preheating temperature. However, crack width increases with preheating temperature. Therefore, via a careful optimization of process parameters, samples with a surface density of 99% and narrow cracks are obtained.

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Section: Cracksmentioning

confidence: 99%

Material Health of NiCrBSi Alloy Parts Produced via the Laser Powder Bed Fusion Process

Ty,

Balcaen,

Mokhtari

et al. 2023

Metals

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show abstract

“…Cracking and lack of density seem to be the major limitations. Studies on coatings show that those alloys are prone to cracking at high temperatures (between 800 and 1000 °C) with the formation of a liquid film between dendrites and mostly at low temperatures (between 400 and 600 °C) [10,11]. Finally, remelting the deposited layer via a second laser path is studied to enhance material health [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Laser-Powder Bed Fusion Additive Manufacturing of NiCrBSi Self-Fluxing Nickel Alloy, Material Health - Process Relationship

Ty,

Mokhtari,

Balcaen

et al. 2023

KEM

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Laser Powder Bed Fusion (L-PBF) might be a promising solution for producing complex wear-resistant parts from NiCrBSi self-fluxing nickel alloys. This study investigates a large set of parameters with a baseplate heated up to 500 °C. Furthermore, laser remelting is also explored to further increase surface density and reduce cracking. Material health is deeply investigated by image analysis to quantify different defects (lack of fusion, porosity and cracks). Spatters likely induce lacks of fusion, while the low toughness and high hardness values cause cracks. The lack of fusion surface fraction and crack length decrease with the preheating temperature while the crack width increases. A surface density of 99 % is obtained with careful process optimisation leading to a laser power of 100 W, a laser speed of 750 mm.s-1 and a preheating temperature of 500 °C.

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The effects of boron on in-situ phase evolution and wear resistance of wide-band laser clad nickel composite coatings

Hong

Liu

et al. 2022

Appl. Phys. A

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Microstructures and mechanical properties of Nb nanoparticles modified Ni60 hard-facing alloy fabricated by laser metal deposition

Cited by 10 publications

References 25 publications

Material Health of NiCrBSi Alloy Parts Produced via the Laser Powder Bed Fusion Process

Material Health of NiCrBSi Alloy Parts Produced via the Laser Powder Bed Fusion Process

Laser-Powder Bed Fusion Additive Manufacturing of NiCrBSi Self-Fluxing Nickel Alloy, Material Health - Process Relationship

The effects of boron on in-situ phase evolution and wear resistance of wide-band laser clad nickel composite coatings

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