High cycle fatigue and fracture behavior of LIGA Nickel

The high cycle fatigue response of electrodeposited LIGA Ni structures was determined using cyclic loading and fractography. Extending the lifetime data obtained from tests with R = 0.1 to the condition of fully-reversed loading, the fatigue behavior was found to be comparable to literature values for conventionally processed bulk Ni. Intergranular fatigue cracking of the predominantly ultra-fine-crystalline columnar micro-structure was observed.