酸化物分散強化 Ni 基超合金 MA754 の液相拡散接合

概要

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The ODS alloy (MA754) produced by mechanical alloying was joined by a Liquid phase diffusion bonding method under a low compressive stress using an amorphous insert ribbon metal with small thickness. Microstructural features, concentration of alloying elements and mechanical properties of bonded area were examined. 1) Dispersed Y_2O_3 particles coagulated at the bonded interface in the process of isothermal solidification. However, the amorphous ribbon of insert metal with elements to lower the melting point produced a sound structure without any voids. 2) The rate of interface diffusion between the insert metal and the base metal was influenced by the element added to lower the melting point of insert metal. 3) The fractured position of specimens tested in tension was changed to base metal position at elevated temperatures. The transition temperature depended on the element added to lower the melting point of insert metal. 4) The creep rupture life at 982℃ of bonded alloy was more than 85% of that of the base metal.
社団法人日本鉄鋼協会の論文
1986-08-01