Mechanical properties and creep resistance behaviour of IN-713C alloy castings

The paper presents the results of investigations on the effect of modification process on mechanical properties and high-temperature creep resistance behaviour of IN-713C alloy specimens. Two melts modified in volume were made and one melt modified by combined surface-volume technique. A beneficial modifying effect of filters designed according to the authors’ genuine concept has been proved. As a reference, the results obtained on non-modified castings were used. A very beneficial effect of combined modification on the degree of equiaxial grain refinement and increase of Rm and R02 has been reported. Unfortunately, refining of macrostructure obviously deteriorates the alloy high-temperature creep resistance behaviour.