Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling

Jonas von Kobylinski; Robert Lawitzki; Michael Hofmann; Christian Krempaszky; Ewald Werner

doi:10.1007/s00161-018-0720-0

Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling

Jonas von Kobylinski, Robert Lawitzki, Michael Hofmann, Christian Krempaszky, Ewald Werner

Chair of Materials Science

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

To investigate the microstructure-dependent relationships in polycrystalline Ni-based superalloys (Haynes 282 and Inconel 718) deformed in the elastoplastic regime, the lattice strain evolution along various macroscopic directions and along various crystallographic directions is monitored via in situ neutron diffraction during uniaxial tensile loading. In addition, a crystal plasticity-based finite element model is set up to describe the micromechanical behaviour of a unit cell within a uniaxially loaded polycrystalline aggregate. Appropriate postprocessing of the (micromechanical) field quantities allows to simulate the diffraction experiment and thus to directly compare and to discuss experimental and modelling results.

Original language	English
Pages (from-to)	691-702
Number of pages	12
Journal	Continuum Mechanics and Thermodynamics
Volume	31
Issue number	3
DOIs	https://doi.org/10.1007/s00161-018-0720-0
State	Published - 1 May 2019

Keywords

Crystal plasticity
In situ tension test
Neutron diffraction
Nickel-based superalloy

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von Kobylinski, J., Lawitzki, R., Hofmann, M., Krempaszky, C., & Werner, E. (2019). Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling. Continuum Mechanics and Thermodynamics, 31(3), 691-702. https://doi.org/10.1007/s00161-018-0720-0

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title = "Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling",

abstract = "To investigate the microstructure-dependent relationships in polycrystalline Ni-based superalloys (Haynes 282 and Inconel 718) deformed in the elastoplastic regime, the lattice strain evolution along various macroscopic directions and along various crystallographic directions is monitored via in situ neutron diffraction during uniaxial tensile loading. In addition, a crystal plasticity-based finite element model is set up to describe the micromechanical behaviour of a unit cell within a uniaxially loaded polycrystalline aggregate. Appropriate postprocessing of the (micromechanical) field quantities allows to simulate the diffraction experiment and thus to directly compare and to discuss experimental and modelling results.",

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von Kobylinski, J, Lawitzki, R, Hofmann, M, Krempaszky, C & Werner, E 2019, 'Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling', Continuum Mechanics and Thermodynamics, vol. 31, no. 3, pp. 691-702. https://doi.org/10.1007/s00161-018-0720-0

Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling. / von Kobylinski, Jonas; Lawitzki, Robert; Hofmann, Michael et al.
In: Continuum Mechanics and Thermodynamics, Vol. 31, No. 3, 01.05.2019, p. 691-702.

Research output: Contribution to journal › Article › peer-review

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T2 - a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling

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AU - Hofmann, Michael

AU - Krempaszky, Christian

AU - Werner, Ewald

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AB - To investigate the microstructure-dependent relationships in polycrystalline Ni-based superalloys (Haynes 282 and Inconel 718) deformed in the elastoplastic regime, the lattice strain evolution along various macroscopic directions and along various crystallographic directions is monitored via in situ neutron diffraction during uniaxial tensile loading. In addition, a crystal plasticity-based finite element model is set up to describe the micromechanical behaviour of a unit cell within a uniaxially loaded polycrystalline aggregate. Appropriate postprocessing of the (micromechanical) field quantities allows to simulate the diffraction experiment and thus to directly compare and to discuss experimental and modelling results.

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KW - In situ tension test

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von Kobylinski J, Lawitzki R, Hofmann M, Krempaszky C, Werner E. Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling. Continuum Mechanics and Thermodynamics. 2019 May 1;31(3):691-702. doi: 10.1007/s00161-018-0720-0

Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling

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Keywords

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