A29 積層造形物内部の残留応力分布と応力緩和処理(OS9 レーザ応用加工(2))

概要

論文の詳細を見る
This paper deals with the reduction of residual stress induced during the selective laser melting. The residual stress within the consolidated structure is calculated by the strain measurement attached on the bottom face of the substrate when the consolidated structure is cut with an end mill. The influences of base plate thickness and structure height on the residual stresses are investigated. In addition, the effect of post heating by a laser beam irradiation is evaluated. The result showed that the deformation of the substrate increased with increasing of the consolidated layer and decreasing of base plate thickness. The residual stress distribution within the consolidated structure was extremely large at the top layer of the structure and the boundary between the base plate and structure. The residual stress decreased when the top layer of the consolidated structure was heated by laser beam irradiation, and resulted in the reduction of the deformation of base plate.
2010-11-19