TY - GEN
T1 - Crack growth characteristics and damage in 12Cr steel under high temperature creep and creep-fatigue conditions
AU - Yokota, O.
AU - Sugiura, R.
AU - Yoda, M.
AU - Yokobori, A. T.
AU - Yokobori, T.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - The combined effects of temperature and frequency on the crack growth rate and failure life were investigated using the compact tension specimens of 12Cr steel under creep and creep-fatigue conditions. The creep-fatigue tests were performed by introducing the hold time at the maximum load. At higher frequency where the crack growth rate near the initial stress intensity factor or reciprocal of failure life is proportional to the frequency, the cycle-dependent fatigue process is dominant. The Vickers hardness around the path of crack growth was obtained as a measure of damage during creep and creep-fatigue. Complex fracture surface or branched crack is attributed to the decrease in hardness for creep-fatigue interaction and is characterized by fractal analysis.
AB - The combined effects of temperature and frequency on the crack growth rate and failure life were investigated using the compact tension specimens of 12Cr steel under creep and creep-fatigue conditions. The creep-fatigue tests were performed by introducing the hold time at the maximum load. At higher frequency where the crack growth rate near the initial stress intensity factor or reciprocal of failure life is proportional to the frequency, the cycle-dependent fatigue process is dominant. The Vickers hardness around the path of crack growth was obtained as a measure of damage during creep and creep-fatigue. Complex fracture surface or branched crack is attributed to the decrease in hardness for creep-fatigue interaction and is characterized by fractal analysis.
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M3 - Conference contribution
AN - SCOPUS:84869851104
SN - 9781617820632
T3 - 11th International Conference on Fracture 2005, ICF11
SP - 3203
EP - 3208
BT - 11th International Conference on Fracture 2005, ICF11
T2 - 11th International Conference on Fracture 2005, ICF11
Y2 - 20 March 2005 through 25 March 2005
ER -