Application of Wire Arc Additive Manufacturing for Inconel 718 Superalloy

Sujan, G.K.; Li, Huijun; Pan, Zengxi; Liang, Daniel; Alam, Nazmul

doi:10.1007/978-3-030-91873-6_15

Cited by 3 publications

(7 citation statements)

References 77 publications

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“…However, that condition suffers from an extremely low ductility of 0.9% 30 , whereas the DA at 700 °C in our study maintains a good ductility of 18.6%. This finding is in contrast to the previously reported inferior mechanical properties of wire-arc DED 718 compared to the homogenization treated and wrought ones, often attributed to the presence of Laves and δ phases 22 , 32 , 33 . In our study, the microstructural characterization of the AF sample clearly shows the presence of the Laves phase and highly non-uniform microstructural features (Fig.…”

Section: Discussioncontrasting

confidence: 99%

“…The dashed line are the properties prior to aging. The AF samples possess a room-temperature Young’s modulus of 105.2 GPa, 0.2% offset yield strength (YS 0.2 ) of 427.7 MPa, ultimate tensile strength (UTS) of 787.4 MPa, and a high ductility of 36.2%, comparable to those reported in the previous studies 22 , 32 , 33 . The Young’s modulus in the DA condition is considerably lower than that of the HA conditions, and does not vary with the different aging temperatures.…”

Section: Resultssupporting

confidence: 77%

“…Even though grains coarsen during homogenization treatment and grow to twice as large, the grain boundary strengthening effect is overall insignificant considering the large columnar grain after fabrication, and less likely to be responsible for the difference in mechanical properties.

Figure 7 Comparison of the room temperature YS 0.2 and UTS of our study with data reported in literature and equivalent conventional materials 19 , 22 , 23 , 30 , 32 , 33 . ‘AF’ represents as-fabricated condition; ‘HA’ represents as-fabricated followed by heat treatment with aging; ‘This’ represents the current study and the aging is at 700 °C; ‘AF-H’ and ‘AF-V’ represent the tensile sample in the horizontal (x–y) plane and vertical (z) direction, respectively.…”

Section: Discussionmentioning

confidence: 72%

“… Comparison of the room temperature YS 0.2 and UTS of our study with data reported in literature and equivalent conventional materials 19 , 22 , 23 , 30 , 32 , 33 . ‘AF’ represents as-fabricated condition; ‘HA’ represents as-fabricated followed by heat treatment with aging; ‘This’ represents the current study and the aging is at 700 °C; ‘AF-H’ and ‘AF-V’ represent the tensile sample in the horizontal (x–y) plane and vertical (z) direction, respectively.…”

Section: Discussionmentioning

confidence: 77%

See 3 more Smart Citations

Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718

Song,

Jimenez,

Russell

et al. 2023

Sci Rep

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Wire-arc directed energy deposition (DED) processed Inconel (IN) 718 is known to have coarse columnar grains, strong texture, and significant chemical and microstructural inhomogeneity in the as-fabricated condition. Homogenization treatment is commonly used prior to aging to eliminate the inhomogeneity and detrimental precipitation for better mechanical properties. In this study, however, direct aging (DA) at 700 °C without homogenization has resulted in room-temperature yield strength, ultimate tensile strength (UTS), and elongation that are comparable to wrought condition and among the highest reported properties for wire-arc DED IN718. The DA samples at between 650 and 750 °C aging also demonstrates remarkable ductility when deformed at elevated temperatures. In addition, when aged below 750 °C the DA IN718 possesses significantly higher UTS compared to those with homogenization treatment. These superior mechanical properties are highly likely due to the non-uniform and hierarchical precipitation consisting of disk-shaped γ″ in diameter from a few to tens of nm in the dendritic core area and micron-sized Laves phase and carbides in the inter-dendritic region.

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Section: Discussioncontrasting

confidence: 99%

Section: Resultssupporting

confidence: 77%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 77%

See 2 more Smart Citations

Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718

Song,

Jimenez,

Russell

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The dashed line are the properties prior to aging. The AF samples possess a room-temperature Young's modulus of 105.2 GPa, 0.2% offset yield strength (YS 0.2 ) of 427.7 MPa, ultimate tensile strength (UTS) of 787.4 MPa, and a high ductility of 36.2%, comparable to those reported in the previous studies 22,31,32 . The Young's modulus in the DA condition is considerably lower than that of the HA conditions, and does not vary with the different aging temperatures.…”

Section: Resultssupporting

confidence: 75%

Unusually High Room and Elevated-Temperature Tensile Properties Observed in Direct Aged Wire-Arc Directed Energy Deposited Inconel 718

Song

Jiménez

Russell³

et al. 2023

Preprint

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Unusually High Room and Elevated-Temperature Tensile Properties Observed in Direct Aged Wire-Arc Directed Energy Deposited Inconel 718

Song

Jimenez

Russell

et al. 2023

Preprint

View full text Add to dashboard Cite

Wire-arc directed energy deposition (DED) processed Inconel (IN) 718 is known to have coarse columnar grain, strong texture, significant chemical and microstructural inhomogeneity in as-fabricated condition. Homogenization treatment is commonly used prior to aging to eliminate the inhomogeneity and detrimental precipitation for better mechanical properties. In this study, however, direct aging (DA) at 700 °C without homogenization has resulted in room-temperature yield strength, ultimate tensile strength (UTS), and elongation that are comparable to wrought condition and among the highest reported properties for wire-arc DED IN718. The DA samples at between 650 °C and 750 °C aging also demonstrates remarkable ductility when deformed at elevated temperatures. In addition, when aged below 750 °C the DA IN718 possesses significantly higher UTS compared to those with homogenization treatment. These superior mechanical properties are highly likely due to the non-uniform and hierarchical precipitation consisting of disk-shaped γ″ in diameter from a few to tens of nm in the dendritic core area and micron-sized Laves phase and carbides in the inter-dendritic region.

show abstract

Application of Wire Arc Additive Manufacturing for Inconel 718 Superalloy

Cited by 3 publications

References 77 publications

Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718

Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718

Unusually High Room and Elevated-Temperature Tensile Properties Observed in Direct Aged Wire-Arc Directed Energy Deposited Inconel 718

Unusually High Room and Elevated-Temperature Tensile Properties Observed in Direct Aged Wire-Arc Directed Energy Deposited Inconel 718

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