In situ monitoring the effects of Ti6Al4V powder oxidation during laser powder bed fusion additive manufacturing

Soundarapandiyan, Gowtham; Leung, Chu Lun Alex; Johnston, Carol; Chen, Bo; Khan, Raja H.U.; McNutt, Phil; Bhatt, Alisha; Atwood, Robert C.; Lee, Peter D.; Fitzpatrick, Michael E.

doi:10.1016/j.ijmachtools.2023.104049

Cited by 14 publications

(2 citation statements)

References 51 publications

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“…Micro-computed tomography is a well-established technique used to non-destructively analyze the interior of objects, providing three-dimensional images that carry all the spatial information about a particular powder [11][12][13]. It is used by researchers and companies in the testing of additive manufacturing products to characterize the defects within the parts [14][15][16][17][18], as these parts are generally small in quantity and customized, and some parts are more expensive than machined parts. The schematic diagram of CT is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Physical Properties of Ti6Al4V Powders Used in a Powder Bed Fusion Based on 3D X-ray Computed Tomography Images

Mao,

Hu,

Chen

et al. 2024

Materials

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The physical properties of Ti6Al4V powder affect the spreadability of the powder and uniformity of the powder bed, which had a great impact on the performance of built parts made by powder bed fusion technology. Micro-computed tomography is a well-established technique used to analyze the non-destructivity of the objects’ interior. Ti6Al4V powders were scanned with micro-CT to show the internal and external information of all the particles. The morphology, particle size distribution, hollow particle ratio, density, inclusion, and specific surface area of the powder samples were quantitatively characterized, and the relationship of flowability with these physical properties was analyzed in this work. The research results of this article showed that micro-CT is an effective way to characterize these items, and can be developed as a standard method of powder physical properties in the future.

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Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Physical Properties of Ti6Al4V Powders Used in a Powder Bed Fusion Based on 3D X-ray Computed Tomography Images

Mao,

Hu,

Chen

et al. 2024

Materials

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“…15 However, there is limited in situ research on the evolution processes of nanoparticles in photothermal transient environments, such as solid-state crystal transformations and changes of state, which limits the understanding and application of LSPC technology. Recently, various methods of real-time analysis, such as in situ Xrays, 26,27 dynamic light scattering (DLS), 28 light absorption/ emission spectroscopy, 29,30 time-resolved shadowgraphy, 31,32 photoacoustic (PA) spectroscopy [33][34][35][36] are used to analyze the process of laser interaction with matter. DLS provides information on the presence of a few nm or larger objects, 37 however, this technology does not distinguish between bubbles and nanoparticles, and the signal is strongly dominated by larger objects.…”

Section: Introductionmentioning

confidence: 99%