粒界腐食処理を施したＳＵＳ３０４Ｌステンレス鋼焼結体の減衰能特性 Damping Properties of Sintered SUS304L Stainless Steel Modified by the Intergranular Corrosion Treatment

An investigation was made on the damping properties of sintered SUS304L stainless steels modified by the corrosion treatment. The results were summarized as follows:<BR>(1) The damping capacity of sintered SUS304L stainless steels modified by the intergranular corrosion treatment was approximately two to forty times as large as the value of as-sintered compacts.<BR>(2) The increases of (S<SUB>t</SUB>-S<SUB>s</SUB>) in the sintered compact using -100 mesh powders were higher than that of -20/+60 mesh powders, where S<SUB>t</SUB> and S<SUB>s</SUB> are the damping capacities of specimen with and without intergranular corrosion treatments respectively.<BR>(3) The increases of (S<SUB>t</SUB>-S<SUB>s</SUB>) on the corrosion time using the corrosion reagent of 10%CuSO<SUB>4</SUB>-H<SUB>2</SUB>SO<SUB>4</SUB> were higher than by using of 65%HNO<SUB>3</SUB>.