TY - GEN
T1 - Quantification and prediction of residual stresses in creep crack growth specimens
AU - Mehmanparast, Ali
AU - Davies, Catrin M.
AU - Nikbin, Kamran M.
PY - 2014/2/1
Y1 - 2014/2/1
N2 - An important issue to be considered in the life assessment of power plant components is the effects of prior creep damage on subsequent fatigue crack growth and fracture behavior. To examine these effects, creep damage has been introduced into 316H stainless steel material by interrupting creep crack growth (CCG) tests on compact tension, C(T), specimens at 550 °C. During the CCG tests, the specimen is loaded in tension, crept and unloaded after a small amount of crack extension. This process introduces compressive residual stress fields at the crack tip, which may subsequently affect the fatigue crack growth test results. In this work, neutron diffraction (ND) measurements have been conducted on interrupted CCG test specimens, which contain creep damage local to the crack tip, and the results are compared to predictions obtained from finite element (FE) simulations. Reasonable agreement has been found between the FE predictions and ND measurements.
AB - An important issue to be considered in the life assessment of power plant components is the effects of prior creep damage on subsequent fatigue crack growth and fracture behavior. To examine these effects, creep damage has been introduced into 316H stainless steel material by interrupting creep crack growth (CCG) tests on compact tension, C(T), specimens at 550 °C. During the CCG tests, the specimen is loaded in tension, crept and unloaded after a small amount of crack extension. This process introduces compressive residual stress fields at the crack tip, which may subsequently affect the fatigue crack growth test results. In this work, neutron diffraction (ND) measurements have been conducted on interrupted CCG test specimens, which contain creep damage local to the crack tip, and the results are compared to predictions obtained from finite element (FE) simulations. Reasonable agreement has been found between the FE predictions and ND measurements.
KW - creep crack growth
KW - creep damage
KW - neutron diffraction
KW - residual stress
UR - http://www.scopus.com/inward/record.url?scp=84896900558&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.777.25
DO - 10.4028/www.scientific.net/MSF.777.25
M3 - Conference contribution book
AN - SCOPUS:84896900558
SN - 9783038350026
VL - 777
T3 - Materials Science Forum
SP - 25
EP - 30
BT - Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation VII
T2 - 7th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2013
Y2 - 10 September 2013 through 12 September 2013
ER -