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Prediction of residual stress and deformation based on the temperature distribution in 3D-printed parts

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Abstract
Selective laser melting (SLM) is a promising additive manufacturing (AM) technique that has the potential to produce almost any
three-dimensional (3D) metallic parts with complicated structures. During the SLM process, the thermal behavior of metal powder
plays a significant role in maintaining the product quality during 3D printing. Furthermore, due to high heating and cooling rates
within the selective laser melting (SLM) process, a high-temperature gradient forms in the heat-affected zone, which generates
significant residual stresses within the fabricated parts. In this study, a thermo-mechanical coupling model was developed for
studying thermal behavior, residual stress, and deformation during the SLM process of Ti6Al4V alloy. In the experiments, a
TELOPS FAST-IR (M350) thermal imager was applied to determine the temperature profile of the melting pool and powder
bed along the scanning direction during the SLM fabrication using Ti6Al4V powder. The numerically calculated results were
compared with the experimentally determined temperature distribution. The comparison showed that the calculated peak temperature
for single track by the developed thermal model was in good agreement with the experiment results. Through the simulation,
an effective prediction method for investigating the effects of process parameters such as the laser power and scanning speed on the
temperature distribution, residual stress, and deformation was established. The findings showed that the development of residual
stress on the fabricated parts gradually increased throughout the SLM process, produced by a heat accumulation effect.
Author(s)
박홍석안사리 엠디 조나엣이창명
Issued Date
2021
Type
Article
Keyword
Additive manufacturingSelective laser meltingTemperature distributionResidual stressDeformation
DOI
10.1007/s00170-021-06711-5
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8800
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_proquest_journals_2500177619&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Prediction%20of%20residual%20stress%20and%20deformation%20based%20on%20the%20temperature%20distribution%20in%203D-printed%20parts&offset=0&pcAvailability=true
Publisher
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Location
영국
Language
영어
ISSN
0268-3768
Citation Volume
113
Citation Number
7-8
Citation Start Page
2227
Citation End Page
2242
Appears in Collections:
Engineering > Aerospace Engineering
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