$The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM$
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The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM

In this study, the ductility and fracturing behavior of IN738 superalloy, which was produced by selective laser melting, were investigated by the in-situ scanning electron microscopy (SEM) method at 700 °C. The results showed that the cavities nucleate mainly at the grain boundaries and inter-dendri...

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Autor principal:	Morteza Taheri
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	In-situ SEM Superalloy IN738 Crack Microstructure Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/b382ed26d9fb4a3697a1c525a96a2bd5
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id	oai:doaj.org-article:b382ed26d9fb4a3697a1c525a96a2bd5
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spelling	oai:doaj.org-article:b382ed26d9fb4a3697a1c525a96a2bd52021-12-04T04:36:28ZThe fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM2666-950110.1016/j.rio.2021.100200https://doaj.org/article/b382ed26d9fb4a3697a1c525a96a2bd52021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666950121001450https://doaj.org/toc/2666-9501In this study, the ductility and fracturing behavior of IN738 superalloy, which was produced by selective laser melting, were investigated by the in-situ scanning electron microscopy (SEM) method at 700 °C. The results showed that the cavities nucleate mainly at the grain boundaries and inter-dendritic region (IDR). In these areas, sites with high-stress concentrations, including γ-γ 'eutectic and TiC carbide, are more prone to crack formation and propagation than other areas. With increasing strain to 27%, the IDR cracks propagated into the core-dendritic regions (CDR) and eventually caused the specimen to fracture. This was due to the presence of cavities that had formed in the CDR due to the outflow of moving dislocations from misorientation.Morteza TaheriElsevierarticleIn-situ SEMSuperalloyIN738CrackMicrostructureOptics. LightQC350-467ENResults in Optics, Vol 5, Iss , Pp 100200- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	In-situ SEM Superalloy IN738 Crack Microstructure Optics. Light QC350-467
spellingShingle	In-situ SEM Superalloy IN738 Crack Microstructure Optics. Light QC350-467 Morteza Taheri The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
description	In this study, the ductility and fracturing behavior of IN738 superalloy, which was produced by selective laser melting, were investigated by the in-situ scanning electron microscopy (SEM) method at 700 °C. The results showed that the cavities nucleate mainly at the grain boundaries and inter-dendritic region (IDR). In these areas, sites with high-stress concentrations, including γ-γ 'eutectic and TiC carbide, are more prone to crack formation and propagation than other areas. With increasing strain to 27%, the IDR cracks propagated into the core-dendritic regions (CDR) and eventually caused the specimen to fracture. This was due to the presence of cavities that had formed in the CDR due to the outflow of moving dislocations from misorientation.
format	article
author	Morteza Taheri
author_facet	Morteza Taheri
author_sort	Morteza Taheri
title	The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
title_short	The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
title_full	The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
title_fullStr	The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
title_full_unstemmed	The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM
title_sort	fracture behaviors of the selective laser melting processed in738 superalloy by in-situ tensile sem
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b382ed26d9fb4a3697a1c525a96a2bd5
work_keys_str_mv	AT mortezataheri thefracturebehaviorsoftheselectivelasermeltingprocessedin738superalloybyinsitutensilesem AT mortezataheri fracturebehaviorsoftheselectivelasermeltingprocessedin738superalloybyinsitutensilesem
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The fracture behaviors of the selective laser melting processed IN738 superalloy by in-situ tensile SEM

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