2023
DOI: 10.3390/s23208462
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Multi-Task Learning of Scanning Electron Microscopy and Synthetic Thermal Tomography Images for Detection of Defects in Additively Manufactured Metals

Sarah Scott,
Wei-Ying Chen,
Alexander Heifetz

Abstract: One of the key challenges in laser powder bed fusion (LPBF) additive manufacturing of metals is the appearance of microscopic pores in 3D-printed metallic structures. Quality control in LPBF can be accomplished with non-destructive imaging of the actual 3D-printed structures. Thermal tomography (TT) is a promising non-contact, non-destructive imaging method, which allows for the visualization of subsurface defects in arbitrary-sized metallic structures. However, because imaging is based on heat diffusion, TT i… Show more

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Cited by 5 publications
(3 citation statements)
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“…Depending on the shape, size, and orientation relative to structure surfaces, porosity defects could lead to material crack formation and cause structural failure [ 22 , 23 , 24 ]. Scanning electron microscopy (SEM) is a suitable method for determining how these defects could be detected [ 25 ].…”
Section: Introductionmentioning
confidence: 99%
“…Depending on the shape, size, and orientation relative to structure surfaces, porosity defects could lead to material crack formation and cause structural failure [ 22 , 23 , 24 ]. Scanning electron microscopy (SEM) is a suitable method for determining how these defects could be detected [ 25 ].…”
Section: Introductionmentioning
confidence: 99%
“…The ICTs allow today present many solutions for the use of thermal imaging, which is thanks to the different equipment that allows the registration of thermal images, performing an analysis of the state of the art and the literature we present articles where the use of thermal imaging in the field of construction where the analysis of defects is used through the use of synthetic thermographic microscopy [1]. In the analysis of constructions, one of the mechanisms used for quality control, through the analysis of the edges and contours of the buildings, which use thermal images using the thermal polarization technique [2].…”
Section: Introductionmentioning
confidence: 99%
“…Computer equipment, in its configurations, has many components, most of which generate heat, most of which have their own cooling mechanisms incorporated, such as processors, memories, solid disks, motherboards, The chips and especially the graphics processors, in the most advanced versions, present water-based cooling solutions, multiple ventilation systems, among other solutions, all with the intention of being able to cool the temperature of the entire system, mainly the case that contains all components of the computer equipment. Reviewing the literature we find applications of thermal images in multiple uses, such as evaluating these solutions where the texture of the concrete is analyzed in the analysis of constructions, for which tests known as non-destructive tests are used, where one of them They are thermal images, analyzing the edges of the constructions, in order to ensure the integration of the modules [1][2].…”
Section: Introductionmentioning
confidence: 99%