Numerical modeling and synchrotron diffraction measurements of residual stresses in laser powder bed fusion manufactured alloy 625
(2022) In Materials and Design 216.- Abstract
Residual stresses in metal additive manufactured components are a well-known problem. It causes distortion of the samples when removing them from the build plate, as well as acting detrimental with regard to fatigue. The understanding of how residual stresses in a printed sample are affected by process parameters is crucial to allow manufacturers to tune their process parameters, or the design of their component, to limit the negative influence of residual stresses. In this paper, residual stresses in additive manufactured samples are simulated using a thermo-mechanical finite element model. The elasto-plastic behavior of the material is described by a mechanism-based material model that accounts for microstructural and relaxation... (More)
Residual stresses in metal additive manufactured components are a well-known problem. It causes distortion of the samples when removing them from the build plate, as well as acting detrimental with regard to fatigue. The understanding of how residual stresses in a printed sample are affected by process parameters is crucial to allow manufacturers to tune their process parameters, or the design of their component, to limit the negative influence of residual stresses. In this paper, residual stresses in additive manufactured samples are simulated using a thermo-mechanical finite element model. The elasto-plastic behavior of the material is described by a mechanism-based material model that accounts for microstructural and relaxation effects. The heat source in the finite element model is calibrated by fitting the model to experimental data. The residual stress field from the finite element model is compared with experimental results attained from synchrotron X-ray diffraction measurements. The results from the model and measurement give the same trend in the residual stress field. In addition, it is shown that there is no significant difference in trend and magnitude of the resulting residual stresses for an alternation in laser power and scanning speed.
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- author
- Malmelöv, Andreas ; Hassila, Carl Johan ; Fisk, Martin LU ; Wiklund, Urban and Lundbäck, Andreas
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Alloy 625, Deformations, Finite Element Method, Material model, Residual stress, Synchrotron X-ray diffraction
- in
- Materials and Design
- volume
- 216
- article number
- 110548
- publisher
- Elsevier
- external identifiers
-
- scopus:85126860901
- ISSN
- 0264-1275
- DOI
- 10.1016/j.matdes.2022.110548
- language
- English
- LU publication?
- yes
- id
- 7ff2f8f9-7bb3-4307-be6d-616fa90941aa
- date added to LUP
- 2022-04-19 14:20:27
- date last changed
- 2022-04-19 17:00:45
@article{7ff2f8f9-7bb3-4307-be6d-616fa90941aa,
abstract = {{<p>Residual stresses in metal additive manufactured components are a well-known problem. It causes distortion of the samples when removing them from the build plate, as well as acting detrimental with regard to fatigue. The understanding of how residual stresses in a printed sample are affected by process parameters is crucial to allow manufacturers to tune their process parameters, or the design of their component, to limit the negative influence of residual stresses. In this paper, residual stresses in additive manufactured samples are simulated using a thermo-mechanical finite element model. The elasto-plastic behavior of the material is described by a mechanism-based material model that accounts for microstructural and relaxation effects. The heat source in the finite element model is calibrated by fitting the model to experimental data. The residual stress field from the finite element model is compared with experimental results attained from synchrotron X-ray diffraction measurements. The results from the model and measurement give the same trend in the residual stress field. In addition, it is shown that there is no significant difference in trend and magnitude of the resulting residual stresses for an alternation in laser power and scanning speed.</p>}},
author = {{Malmelöv, Andreas and Hassila, Carl Johan and Fisk, Martin and Wiklund, Urban and Lundbäck, Andreas}},
issn = {{0264-1275}},
keywords = {{Alloy 625; Deformations; Finite Element Method; Material model; Residual stress; Synchrotron X-ray diffraction}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Materials and Design}},
title = {{Numerical modeling and synchrotron diffraction measurements of residual stresses in laser powder bed fusion manufactured alloy 625}},
url = {{http://dx.doi.org/10.1016/j.matdes.2022.110548}},
doi = {{10.1016/j.matdes.2022.110548}},
volume = {{216}},
year = {{2022}},
}