Abstract
Industrial P/M products shapes are often complex and do not permit any density measurement by X-ray transmission. The local density at different locations (on several mm3, just after powder compression) is an essential parameter of the process, which governs the future mechanical properties of the final product (after sintering). In order to set up compression presses, operators need rapid assessments after each tool modification that has influenced local density distribution within the compressed piece. Currently, a statistical approach is used on the basis of manual measurements on broken products. Drawbacks are evident: operator dependent results, insufficient accuracy on the density (±0.05), time consuming procedure (20 minutes).
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Muller, J., Ackermann, L., Babot, D., Peix, G., Zhu, P. (1994). Quantitative Nondestructive Evaluation of Density of Green State Compressed Products. In: Green, R.E., Kozaczek, K.J., Ruud, C.O. (eds) Nondestructive Characterization of Materials VI. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2574-5_22
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