A super alloy is an alloy that exhibits excellent mechanical strength and resistance to creep (tendency for solids to slowly move or deform under stress) at high temperatures; good surface stability; and corrosion and oxidation resistance.
Heat resistant super alloys (HRSA) can be divided into four material groups; nickel-based, iron-based, cobalt-based and titanium alloys. Titanium can be pure or with alpha and beta structures.
The machinability of both HRSA and titanium is poor, especially in aged conditions, which impose particular demands on the cutting tools.
It emphasizes the importance of sharp edges to prevent the formation of so-called white layers, with different hardnesses and residual stresses.
Grades commonly used in finishing are 1105, 1115 and for roughing ceramic 6060 as 670 or S05F. The recommended geometries are -SF, -SGF, SM and -SMR.
Grades to be used are H13A, H10A and 1115. The recommended geometries are -SF, -SGF, -SM and -SMR.