Ra. Smith et al., SHORT FATIGUE-CRACK GROWTH-BEHAVIOR IN WASPALOY AT ROOM AND ELEVATED-TEMPERATURES, Fatigue & fracture of engineering materials & structures, 19(12), 1996, pp. 1505-1514
Short fatigue crack growth tests have been carried out at room and ele
vated temperatures using the nickel-based superalloy known as Waspaloy
. A fully automated computer controlled system has been developed and
employed for controlling the testing and monitoring of the growth of f
reely initiated surface short cracks on smooth specimens. Surface crac
ks as small as 10 mu m in length have been detected and recorded at te
mperatures up to 700 degrees C. Anomalous short crack propagation beha
viour was observed when comparisons were made with the corresponding l
ong crack behaviour. Some aspects of mechanical microstructural and en
vironmental effects on the short fatigue crack growth behaviour of the
material are discussed.