Orthogonal experiments were designed to research the effects of grinding parameters and surface roughness on the fatigue life of IC10 superalloy during creep feed grinding. Based on experimental results

empirical models of grinding parameters and surface roughness

fatigue life were established. Then multi-objective optimization of grinding parameters was carried out for smaller surface roughness

longer fatigue life and higher machining efficiency. The results show that the fatigue life increases with increasing grinding wheel speed while it decreases with increasing workpiece

feed speed or grinding depth. The wheel speed has the highest influence on the fatigue life

followed by workpiece feed speed and grinding depth. As surface roughness R a increased from 0.44μm to 0.94μm

the fatigue life decreased about 87.1% from 9.69×10

6

to 1.25×10

6

indicating that the grinding surface roughness has a significant influence on fatigue life. By optimization of grinding parameters

a group of suitable grinding parameters could be given as: wheel speed v

s

= 20m/s

the workpiece feed speed v

w

= 117mm/min

and the grinding depth a

p

=0.48mm

with taking

full account of the fatigue life

machining efficiency and surface roughness.