Epitaxial growth of a single-crystal nickel-based superalloy during laser melting with high-power flat-top laser

Liu, Yang; Wang, Yachao; Savinov, Roman; Shi, Jing

doi:10.1016/j.optlastec.2021.107444

Cited by 16 publications

(4 citation statements)

References 37 publications

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“…Wang et al [33] SX Ni-based superalloy Laser surface melting Remelting 6000 --Liu et al [95] Figure 3. Epitaxial growth of a SX superalloy by laser DED.…”

Section: Influence Of Ded Process Parametersmentioning

confidence: 99%

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Epitaxial Growth and Stray Grain Control toward Single‐Crystal Metallic Materials by Additive Manufacturing: A Review

Liu

Shi

2023

Adv Eng Mater

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Additive manufacturing (AM) possesses tremendous potential in controlling epitaxial growth of deposited materials, and thus attempts have been made to employ AM technology to fabricate or repair single‐crystal (SX) metal parts in recent years. One of the key issues in producing SX structures is the elimination of stray grain (SG) formation, but the layer‐wise fabrication nature of AM processes makes SGs difficult to avoid. Herein, the state‐of‐the‐art developments in this emerging research area are surveyed. It introduces the fundamental mechanisms of epitaxial growth in AM, summarizes the recent innovations and findings on using AM techniques to assist epitaxial growth and avoid SGs for SX metallic materials, discusses the relation of stray‐grain avoidance and crack‐free microstructure, and reviews the analytical and numerical modeling efforts for epitaxial growth and texture control. In addition, the challenges in achieving defect‐free SX microstructure are discussed, such that future research directions are pointed out. It is believed that this critical review provides insights on microstructure control for AM‐produced metallic materials and lays a solid foundation to stimulate more rigorous research.

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“…Wang et al [33] SX Ni-based superalloy Laser surface melting Remelting 6000 --Liu et al [95] Figure 3. Epitaxial growth of a SX superalloy by laser DED.…”

Section: Influence Of Ded Process Parametersmentioning

confidence: 99%

“…In addition, the effects of laser scanning direction, adopting high-power flat-top laser profile, growth competition among misoriented columnar grains, and cooling rate are also studied in literature. [32,85,95,96]…”

Section: Laser Remelting Processmentioning

confidence: 99%

Epitaxial Growth and Stray Grain Control toward Single‐Crystal Metallic Materials by Additive Manufacturing: A Review

Liu

Shi

2023

Adv Eng Mater

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“…They found the formation of SC microstructure in the FZ under low heat inputs and polycrystalline grain structure with stray crystals under high heat inputs. Liu et al [11] found epitaxial growth of a SC nickel-based superalloy in laser melting using a high-power flat-top laser profile under a longer exposure time.…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Remelting in Single-Crystal Nickel-based Superalloy using a Continuous Wave Fiber Laser

Nandam

Rao

Gokhale

et al. 2023

Lasers Manuf. Mater. Process.

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“…They found the formation of SC microstructure in the FZ under low heat inputs and poly-crystalline grain structure with stray crystals under high heat inputs. Liu et al [12] found epitaxial growth of a SC nickel-based superalloy in laser melting using a high-power flat-top laser profile under longer exposure time.…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Remelting in Single-Crystal Nickel-Based Superalloy Using a Continuous Wave Fiber Laser

NANDAM¹,

Rao

Gokhale

et al. 2022

SSRN Journal

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Epitaxial growth of a single-crystal nickel-based superalloy during laser melting with high-power flat-top laser

Cited by 16 publications

References 37 publications

Epitaxial Growth and Stray Grain Control toward Single‐Crystal Metallic Materials by Additive Manufacturing: A Review

Epitaxial Growth and Stray Grain Control toward Single‐Crystal Metallic Materials by Additive Manufacturing: A Review

Laser Surface Remelting in Single-Crystal Nickel-based Superalloy using a Continuous Wave Fiber Laser

Laser Surface Remelting in Single-Crystal Nickel-Based Superalloy Using a Continuous Wave Fiber Laser

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