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Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy. / Seow, Cui; Coules, Harry; Khan, Raja.

Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. 2018. 84090.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Harvard

Seow, C, Coules, H & Khan, R 2018, Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy. in Proceedings of the ASME 2018 Pressure Vessels and Piping Conference., 84090.

APA

Seow, C., Coules, H., & Khan, R. (2018). Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy. In Proceedings of the ASME 2018 Pressure Vessels and Piping Conference [84090]

Vancouver

Seow C, Coules H, Khan R. Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy. In Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. 2018. 84090

Author

Bibtex

@inproceedings{69cbe23d0c5747899baa31e78e9cde91,
title = "Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy",
abstract = "In this study, the effect of crack orientation on the fracturebehaviour of two compact tension C(T) specimens extractedfrom a Wire + Arc Additively Manufactured (WAAM) wall madefrom Inconel (IN) 625 nickel-base superalloy was investigated.Both specimens had different levels of ductile tearing but theirload vs. crack mouth opening displacement (CMOD) behaviourwas relatively similar. The total-and-elastic strain distributionaround a crack tip was measured in both specimens using DigitalImage Correlation (DIC) and neutron diffraction respectively.The results show that the strain distribution and deformationaround the crack tip are different in the two directions. In thespecimen with crack orientation parallel to the build direction,banding was observed in both the total strain maps and thedeformation pattern. Neutron diffraction measurements on thisspecimen also showed non-monotonic elastic strain evolution,suggesting the occurrence of intergranular load sheddingmechanisms. These were not observed in the specimen withcrack orientation perpendicular to the build direction. ElectronBackscatter Diffraction (EBSD) maps show that the WAAMIN625 material is strongly textured with coarse columnar grainselongated in the build direction. The effect of microstructure hasbeen correlated with the differences in strain distribution in thetwo specimens.",
author = "Cui Seow and Harry Coules and Raja Khan",
year = "2018",
language = "English",
booktitle = "Proceedings of the ASME 2018 Pressure Vessels and Piping Conference",

}

RIS - suitable for import to EndNote

TY - GEN

T1 - Effect of crack orientation on fracture behaviour of Wire + Arc Additively Manufactured (WAAM) nickel-base superalloy

AU - Seow, Cui

AU - Coules, Harry

AU - Khan, Raja

PY - 2018

Y1 - 2018

N2 - In this study, the effect of crack orientation on the fracturebehaviour of two compact tension C(T) specimens extractedfrom a Wire + Arc Additively Manufactured (WAAM) wall madefrom Inconel (IN) 625 nickel-base superalloy was investigated.Both specimens had different levels of ductile tearing but theirload vs. crack mouth opening displacement (CMOD) behaviourwas relatively similar. The total-and-elastic strain distributionaround a crack tip was measured in both specimens using DigitalImage Correlation (DIC) and neutron diffraction respectively.The results show that the strain distribution and deformationaround the crack tip are different in the two directions. In thespecimen with crack orientation parallel to the build direction,banding was observed in both the total strain maps and thedeformation pattern. Neutron diffraction measurements on thisspecimen also showed non-monotonic elastic strain evolution,suggesting the occurrence of intergranular load sheddingmechanisms. These were not observed in the specimen withcrack orientation perpendicular to the build direction. ElectronBackscatter Diffraction (EBSD) maps show that the WAAMIN625 material is strongly textured with coarse columnar grainselongated in the build direction. The effect of microstructure hasbeen correlated with the differences in strain distribution in thetwo specimens.

AB - In this study, the effect of crack orientation on the fracturebehaviour of two compact tension C(T) specimens extractedfrom a Wire + Arc Additively Manufactured (WAAM) wall madefrom Inconel (IN) 625 nickel-base superalloy was investigated.Both specimens had different levels of ductile tearing but theirload vs. crack mouth opening displacement (CMOD) behaviourwas relatively similar. The total-and-elastic strain distributionaround a crack tip was measured in both specimens using DigitalImage Correlation (DIC) and neutron diffraction respectively.The results show that the strain distribution and deformationaround the crack tip are different in the two directions. In thespecimen with crack orientation parallel to the build direction,banding was observed in both the total strain maps and thedeformation pattern. Neutron diffraction measurements on thisspecimen also showed non-monotonic elastic strain evolution,suggesting the occurrence of intergranular load sheddingmechanisms. These were not observed in the specimen withcrack orientation perpendicular to the build direction. ElectronBackscatter Diffraction (EBSD) maps show that the WAAMIN625 material is strongly textured with coarse columnar grainselongated in the build direction. The effect of microstructure hasbeen correlated with the differences in strain distribution in thetwo specimens.

M3 - Conference contribution

BT - Proceedings of the ASME 2018 Pressure Vessels and Piping Conference

ER -