Speaker
Description
Energy-resolved neutron imaging provides unique opportunity to investigate bulk microstructure and elemental composition, all in one non-destructive measurement, providing neutron transmis-sion spectra can be measured in a wide energy range [1]. The existence of bright pulsed neutron beams and fast neutron counting detectors enable reconstruction of sample characteristics within several centimetre areas with ~0.1 mm resolution measured all at the same time.
We present the results of experiments where Al alloy samples were produced by wire-arc additive manufacturing (AM) technique [2]. Interdiffusion of materials between the deposition layers was investigated through neutron resonance absorption, while the microstructure was revealed through Bragg edge imaging. Several samples were used in this study, some with rolling applied to individual layers during manufacturing process. Both as-built and heat treated samples were investigated. The analysis of neutron resonance absorption enabled quantitative reconstruction of Ag and Cu elemental composition within different layers of AM printed materials.
| Abstract Topic | Development of experimental techniques and new principles |
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