Electron Beam Welding of Inconel 718

Patel, Vivek; Sali, Akash; Hyder, James; Corliss, Mike; Hyder, David; Hung, Wayne

doi:10.1016/j.promfg.2020.05.065

Cited by 23 publications

(12 citation statements)

References 18 publications

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“…A slower beam speed, higher beam current, and eventually the higher heat inputs allowed longer interaction time between the beam and the material, forming a larger molten volume, deeper weld penetration, and weld area. Similar trends were concluded for EBW of rolled IN718 materials in other published articles [13], [15], [23], [24]. However, an opposite trend was reported for EBW of AlSi10Mg.…”

Section: Methodssupporting

confidence: 87%

“…Such nailshape was consistent within all the welded samples. Similar published results were found for electron beam welding of rolled IN718 [10], [12], [15]. The L-PBF base metal revealed the presence of defects such as gas-filled spherical pores, and irregularly shaped voids on their surface concentrated on the boundaries of the printed samples.…”

Section: Methodssupporting

confidence: 84%

“…13-15 suggest that: ─ The measured yield strengths of all samples exceeded the ASTM specification for acceptable yield strength (600MPa) and the maximum yield strength of EBW of rolled IN718 from the previous study (571MPa) [15] ─ For ultimate tensile strength, at least one replicate of each sample exceeded the ASTM specification of the acceptable tensile strength (920MPa) except for samples 18A/B (196.8 J/mm). The tensile strengths of L-PBF and EBW samples exceeded those of their rolled counterparts at each corresponding welding parameter [15]. ─ Although excellent yield and tensile strengths were obtained, the EBW samples were brittle and could not meet the ductility specification.…”

Section: Tensile Propertiesmentioning

confidence: 87%

“…This was also verified by the higher toughness of the as-printed samples compared to the rest (Table 2). The EBW of rolled IN718 plates had better ductility (66% max elongation) as compared to the L-PBF counterparts due to the absence of inherent L-PBF defects [15].…”

Section: Tensile Propertiesmentioning

confidence: 97%

“…The EBW was successfully utilized to join as-received 12.7mm-thick rolled IN718 plates [15]. EBW parameters were: 50kV constant voltage, current of 65, 60, and 50mA, and speeds of 660.4, 787.4, and 914.4mm/min.…”

Section: Ebw Of Rolled In718mentioning

confidence: 99%

See 4 more Smart Citations

Electron-Beam Welding of Laser Powder-Bed-Fused Inconel 718

Sali

Patel

Hyder

et al. 2021

IJEMM

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This study explores the application of Electron-Beam Welding (EBW) for joining Laser Powder-Bed-Fused Inconel 718 (L-PBF IN718) superalloy. Three different levels of electron beam speed and beam current were explored to give nine different electron beam heat inputs for experimentation. To define the weld characteristics microhardness, tensile, and fractography analysis using scanning electron microscopy, optical microscopy, and energy dispersive spectroscopy were conducted. Typical nail-shaped weld geometry was observed with penetration depth proportional to heat input. Most welded samples exceeded the yield strength (600MPa) and tensile strength (920MPa) requirements from the ASTM F3055 specifications for additively manufactured IN718, however, the specimens did not meet the ductility requirements (27%). Brittleness of the weld was attributed to the presence of brittle secondary phases in the weld matrix, and unfused metal powder of adjacent L-PBF layers. Post-processing heat treatments were recommended to improve the weld quality while improving the ductility of EBW joints.

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Section: Methodssupporting

confidence: 87%

Section: Methodssupporting

confidence: 84%

Section: Tensile Propertiesmentioning

confidence: 87%

Section: Tensile Propertiesmentioning

confidence: 97%

Section: Ebw Of Rolled In718mentioning

confidence: 99%

See 3 more Smart Citations

Electron-Beam Welding of Laser Powder-Bed-Fused Inconel 718

Sali

Patel

Hyder

et al. 2021

IJEMM

Self Cite

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Study of Surface Modification of NiCrBSi Coating by Electron Beam Cladding on Inconel 625 Alloy

Li,

Hou,

Zhao

et al. 2023

Adv Eng Mater

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Surface modification of nickel‐based 625 alloy is performed using a vacuum electron beam to improve its surface properties. The development of the microstructure is analyzed through scanning electron microscopy, X‐ray diffraction, and transmission electron microscopy. The tribometer RETC (MFT‐5000) is used to assess the wear resistance of the modified surface. The results demonstrate that the microstructure of the cladding zone exhibits columnar growth of the face‐centered cubic phase. As the scanning speed increases, the Cube texture s gradually weak, surface hardness increases, and both wear volume and wear rate decrease, thereby improving wear resistance. The maximum surface hardness is achieved at a scanning speed of 400 mm min−1, with a value of 489.8 HV, 1.977 times higher than the substrate. The minimum wear volume measures 0.1518 mm3, and the wear rate is likewise at its lowest point, measuring 0.506 × 10−5 mm3 N−1 m. Compared to the substrate, the material demonstrates an 88.44% reduction in wear rate and an 8.65‐fold improvement in wear resistance. These results demonstrate the significant enhancement of surface properties in Inconel 625, through surface modification using a vacuum electron beam.

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