503 中性子回折法によるコールドスプレー皮膜の残留応力測定(OS5-1 回折法による材料評価)

概要

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Cold spray method is solid coating process, can reduce a heat influence on materials and can make a uniform coating without oxide. The residual stress is a problem in many industries and it needs to measure nondestructively. In this study the residual stress of cold sprayed Ni coatings was measured using neutron diffraction method at RESA in JRR-3 of JAEA. The coating of 5mm thick is sprayed on the SUS304 stainless steel plate. The three direction residual stress (σx, σy, σz) in every 1mm of sprayed coatings was measured. The in-plane stress was a compression near the coating surface and changed to a tension close to the interface between coating and substrate and was an equi-bi-axial stress state. The out-of-plane stress near the interface had a tension due to a plane strain stress state.
2010-10-09