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Image Correlation Helps Optimize Laser-Based 3-D Printing

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LIVERMORE, Calif., Nov. 18, 2014 — Digital image correlation (DIC) could help prevent warping of metal parts made via laser-based additive manufacturing. Researchers at Lawrence Livermore National Laboratory used the technique to find correlations between the power and speed of lasers used in powder-bed fusion additive manufacturing and the parts they produce. “We took time to do a systematic study of residual stresses that allowed us to measure things that were not quantified before,” said lead researcher Dr. Amanda Wu. “Being able to calibrate our AM parameters for residual stress minimization...Read full article

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