光造形材の残留応力とひずみに関する研究

概要

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Rapid prototyping is said to be a promising technology that can answer needs of industries that want to develop rapidly. But parts subjected to severe LASER heat history tends to result in higher residual stress and distortion. Therefore residual stress measured by X ray diffraction and distortion are discussed in this paper. As a result the following is made clear. ・ Residual stress increases with increasing thickness of layer contacting base plate. ・ Residual stress increases with proceeding to forming step. ・ Residual stress is influenced more by layer thickness contacting base plate than by forming step. ・ Residual stress is higher in the center of part than in the peripheral. ・ There is no correlation between residual stress and distortion, maybe due to insufficient removal of surface deformed layer on base plate.
福井工業大学の論文