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- W2987773155 abstract "Porosity in additively manufactured metals can reduce material strength and is generally undesirable. Although studies have shown relationships between process parameters and porosity, monitoring strategies for defect detection and pore formation are still needed. In this paper, instantaneous anomalous conditions are detected in-situ via pyrometry during laser powder bed fusion additive manufacturing and correlated with voids observed using post-build micro-computed tomography. Large two-color pyrometry data sets were used to estimate instantaneous temperatures, melt pool orientations and aspect ratios. Machine learning algorithms were then applied to processed pyrometry data to detect outlier images and conditions. It is shown that melt pool outliers are good predictors of voids observed post-build. With this approach, real time process monitoring can be incorporated into systems to detect defect and void formation. Alternatively, using the methodology presented here, pyrometry data can be post processed for porosity assessment." @default.
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- W2987773155 date "2020-01-01" @default.
- W2987773155 modified "2023-10-16" @default.
- W2987773155 title "Linking pyrometry to porosity in additively manufactured metals" @default.
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- W2987773155 doi "https://doi.org/10.1016/j.addma.2019.100946" @default.
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