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Modeling and Experimental Measurement with Synchrotron Radiation of Residual Stresses in Laser Metal Deposited Ti-6Al-4V
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-0053-5537
GKN Aerospace Engine Systems, 461 81 Trollhättan.
NASA Langley Research Center, Hampton, Virginia USA.
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Number of Authors: 82016 (English)In: Proceedings of the 13th World Conference on Titanium, 2016, p. 1279-1282Conference paper, Published paper (Refereed)
Abstract [en]

There are many challenges in producing aerospace components by additive manufacturing (AM). One of them is to keep the residual stresses and deformations to a minimum. Another one is to achieve the desired material properties in the final component. A computer model can be of great assistance when trying to reduce the negative effects of the manufacturing process. In this work a finite element model is used to predict the thermo-mechanical response during the AM-process. This work features a physically based plasticity model coupled with a microstructure evolution model for the titanium alloy Ti -6Al-4V. Residual stresses in AM components were measured non-destructively using high-energy synchrotron X-ray diffraction on beam line ID15A at the ESRF, Grenoble. The results are compared with FE model predictions of residual stresses. During the process, temperatures and deformations was continuously measured. The measured and computed thermal history agrees well. The result with respect to the deformations agrees well qualitatively. Meaning that the change in deformation in each sequence is well predicted but there is a systematic error that is summing so that the quantitative agreement is lost.

Place, publisher, year, edition, pages
2016. p. 1279-1282
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-31578DOI: 10.1002/9781119296126.ch216Local ID: 5cca2dff-a4b6-473d-8493-af82f50e4f0bISBN: 9781119293668 (print)ISBN: 9781119296126 (electronic)OAI: oai:DiVA.org:ltu-31578DiVA, id: diva2:1004812
Conference
World Conference on Titanium : 16/08/2015 - 20/08/2015
Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-05Bibliographically approved

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Lundbäck, AndreasPederson, RobertLindgren, Lars-Erik

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