Numerical study of the minimum uncut chip thickness in micro‑machining of Inconel 718 based on Johnson–Cook isothermal  model

Silva, Gabriel de Paiva; Oliveira, Déborah de; Malcher, Lucival

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Campo DC	Valor	Idioma
dc.contributor.author	Silva, Gabriel de Paiva	-
dc.contributor.author	Oliveira, Déborah de	-
dc.contributor.author	Malcher, Lucival	-
dc.date.accessioned	2024-05-20T14:34:14Z	-
dc.date.available	2024-05-20T14:34:14Z	-
dc.date.issued	2023-06-07	-
dc.identifier.citation	SILVA, Gabriel de Paiva; OLIVEIRA, Déborah de; MALCHER, Lucival. Numerical study of the minimum uncut chip thickness in micro‑machining of Inconel 718 based on Johnson–Cook isothermal model. The International Journal of Advanced Manufacturing Technology, [S. l.], v. 127, p. 2707–2721, 2023. DOI: https://doi.org/10.1007/s00170-023-11573-0.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/48106	-
dc.language.iso	eng	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Numerical study of the minimum uncut chip thickness in micro‑machining of Inconel 718 based on Johnson–Cook isothermal model	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Método dos elementos finitos	pt_BR
dc.subject.keyword	Plasticidade	pt_BR
dc.identifier.doi	https://doi.org/10.1007/s00170-023-11573-0	pt_BR
dc.relation.publisherversion	https://link.springer.com/article/10.1007/s00170-023-11573-0	pt_BR
dc.description.abstract1	Traditional machining in micro-scale still presents many challenges associated with bad chip formation, presence of high burrs, elevated tool wear and low surface quality. Most problems in micro-machining are a consequence of the size efect, which is the similarity in the scale sizes of the cutting-edge radius of the tool and the minimum uncut chip thickness (MUCT). Micro-machining tends to be even more challenging for low-machinability alloys, such as Inconel 718. Through the fnite ele ment method (FEM), it is possible to estimate the minimum uncut chip thickness of a material providing that the constitutive model that describes its elastoplastic behavior is known. Therefore, the objective of this contribution is to analyze the chip formation in orthogonal micro-cutting of Inconel 718 using numerical FEM simulations and the Johnson–Cook plasticity model in an explicit scheme. Two cutting tools were modelled with diferent edge radius in order to represent a sharp tool and a tool that sufered rounding of the tip because of wear. Simulations were carried out with diferent values of feed per tooth in order to determine which value is closest to MUCT. The Mises stress and accumulated plastic strain were monitored, as well as the cutting forces. The results show that the rounded tool, with an edge radius of 5 µm, leads to higher forces, worse chip formation and worse surface quality when compared to the sharp tool, with an edge radius of 1 µm.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-3654-4953	pt_BR
dc.contributor.affiliation	University of Brasília, Faculty of Technology, Department of Mechanical Engineering	pt_BR
dc.contributor.affiliation	University of Brasília, Faculty of Technology, Department of Mechanical Engineering	pt_BR
dc.contributor.affiliation	University of Brasília, Faculty of Technology, Department of Mechanical Engineering	pt_BR
dc.description.unidade	Faculdade de Tecnologia (FT)	pt_BR
dc.description.unidade	Departamento de Engenharia Mecânica (FT ENM)	pt_BR
dc.description.ppg	Programa de Pós-Graduação em Ciências Mecânicas	pt_BR
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