TY  - EJOU
AU  - Colombo, C.  
AU  - Guagliano, M.  
AU  - Vergani, L.  

TI  - Fatigue Crack Growth Behaviour of Nitrided and Shot Peened Specimens
T2  - Structural Durability \& Health Monitoring

PY  - 2005
VL  - 1
IS  - 4
SN  - 1930-2991

AB  - In this paper the fatigue crack growth properties of a nitrided and shot-peened steel is dealt with: different peening intensities were considered and the resulting residual stresses measured by means of an X-ray diffractometer. Rotating bending fatigue tests were executed on specimens including a blind micro hole, acting as a pre-existent crack. The fracture surface of broken specimens was observed with a SEM to detect the crack growth initiation point. The run-out specimens were broken after the test and the presence of non-propagating cracks detected. The results allowed to determine the propagation threshold of the nitrided and shot peened material.
KW  - Shot peening
KW  -  Gas-nitriding
KW  -  Residual stress
KW  -  Fatigue threshold

DO  - 10.3970/sdhm.2005.001.253