Ali, H., Ghadbeigi, H., Hosseinzadeh, F. et al. (2 more authors) (2019) Effect of pre-emptive in-situ parameter modification on residual stress distributions within selective laser melted Ti6Al4V components. International Journal of Advanced Manufacturing Technology, 103 (9-12). pp. 4467-4479. ISSN 0268-3768
Abstract
The effect of thermally induced residual stresses is not dynamically considered during a selective laser melting (SLM) build; instead, it processes using invariable parameters across the entire component’s cross-section. This lack of pre-emptive in situ parameter adjustment to reduce residual stresses during processing is a lost opportunity for the process with the potential to improve component mechanical properties. This investigation studied the residual stresses introduced during manufacturing of SLM Ti6Al4V benchmark components and adapted process parameters within a build (layer-to-layer specific modifications) to manage and redistribute stresses within these components. It was found that temporarily switching to an increased layer thickness during the build, directly below highly stressed regions within the component, redistributed stresses and reduced the overall stresses within the structure by 8.5% (within the 80–320-MPa residual stress range) compared to standard invariable SLM processing parameters. This work demonstrates the need for current SLM systems to focus on developing a more intelligent processing architecture with parameters that adapt on the fly during a build, in order to manage residual stresses within the built structure.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
Keywords: | Residual Stress; Geometrical Dependence; Cooling Rate; Selective Laser Melting; Additive Manufacturing; Ti6Al4V; Contour Method |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/P006566/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 May 2019 13:22 |
Last Modified: | 03 Dec 2021 10:53 |
Status: | Published |
Publisher: | Springer Nature |
Refereed: | Yes |
Identification Number: | 10.1007/s00170-019-03860-6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146395 |
Download
Filename: Ali2019_Article_EffectOfPre-emptiveInSituParam.pdf
Licence: CC-BY 4.0