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A simplified layer-by-layer model for prediction of residual stress distribution in additively manufactured parts
Linköping University, Sweden.
Linköping University, Sweden.
Linköping University, Sweden.
Linköping University, Sweden.
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2021 (English)In: Metals, ISSN 2075-4701, Vol. 11, no 6, article id 861Article in journal (Refereed) Published
Abstract [en]

With the improvement in technology, additive manufacturing using metal powder has been a go-to method to produce complex-shaped components. With complex shapes being printed, the residual stresses (RS) developed during the printing process are much more difficult to control and manage, which is one of the issues seen in the field of AM. A simplified finite element-based, layer-by-layer activation approach for the prediction of residual stress is presented and applied to L-shaped samples built in two different orientations. The model was validated with residual stress distributions measured using neutron diffraction. It has been demonstrated that this simplified model can predict the trend of the residual stress distribution well inside the parts and give insight into residual stress evolution during printing with time for any area of interest. Although the stress levels predicted are higher than the measured ones, the impact of build direction on the development of RS during the building process and the final RS distributions after removing the base plate could be exploited using the model. This is important for finalizing the print orientation for a complex geometry, as the stress distribution will be different for different print orientations. This simplified tool which does not need high computational power and time can also be useful in component design to reduce the residual stresses. © 2021 by the authors.

Place, publisher, year, edition, pages
MDPI AG , 2021. Vol. 11, no 6, article id 861
Keywords [en]
Additive manufacturing, Finite element, Neutron diffraction, Residual stress
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:ri:diva-53470DOI: 10.3390/met11060861Scopus ID: 2-s2.0-85106424552OAI: oai:DiVA.org:ri-53470DiVA, id: diva2:1565593
Note

Funding details: Stiftelsen för Strategisk Forskning, SSF, GSn15–0008; Funding details: VINNOVA; Funding text 1: Funding: This research is funded by the Swedish Foundation for Strategic Research (Stiftelsen för Strategisk Forskning, SSF), (grant number GSn15–0008) within the Swedish national graduate school in neutron scattering (SwedNess).; Funding text 2: Acknowledgments: The neutron diffraction experiments were conducted at the Australia Nuclear Science and Technology Organization’s (ANSTO) KOWARI beamline through proposal P7182. The authors gratefully acknowledge the support provided by the ANSTO during the experiment. The Additive Manufacturing Research Laboratory (AMRL) at RISE IVF is acknowledged for manufacturing all the specimens and the Lighter Academy as well as the Centre for Additive Manufacturing—Metal (CAM2) financed by the Swedish Governmental Agency of Innovation Systems (Vinnova) for their financial support.

Available from: 2021-06-14 Created: 2021-06-14 Last updated: 2023-06-08Bibliographically approved

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Proper, SebastianHosseini, Seyed

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