TY - JOUR
T1 - Stress-holding time effects on creep-fracture cracking in a notched specimen
AU - Kenji, Kikuchi
AU - Toshimitsu, Yokobori
AU - Masatoshi, Futakawa
AU - Yasushi, Muto
AU - Takeo, Yokobori
PY - 1987
Y1 - 1987
N2 - The cracking behavior of Ni-based heat-resisting alloy was investigated in a vacuum environment at 1073 K using the double-edged notch specimens, with varying the stress-holding time Th and the stress-rising time Tr during the cycle. The results showed that the crack initiation was only time-dependent regardless of Tr and Th. The stress-rising time in the creep-fatigue mode had only a pausing effect against the creep damage because the crack initiation time in the fatigue mode was much longer than that in the creep mode. Although the crack growth was also time-dependent in the fatigue mode of Tr ≧ 6 s, it was rather cyclic-dependent in the fatigue mode of Tr = 1 s. As long as the crack initiation or growth is only time-dependent, the life of the crack initiation or growth can be evaluated by a single parameter of Th/Tr, in the trapezoidal load wave.
AB - The cracking behavior of Ni-based heat-resisting alloy was investigated in a vacuum environment at 1073 K using the double-edged notch specimens, with varying the stress-holding time Th and the stress-rising time Tr during the cycle. The results showed that the crack initiation was only time-dependent regardless of Tr and Th. The stress-rising time in the creep-fatigue mode had only a pausing effect against the creep damage because the crack initiation time in the fatigue mode was much longer than that in the creep mode. Although the crack growth was also time-dependent in the fatigue mode of Tr ≧ 6 s, it was rather cyclic-dependent in the fatigue mode of Tr = 1 s. As long as the crack initiation or growth is only time-dependent, the life of the crack initiation or growth can be evaluated by a single parameter of Th/Tr, in the trapezoidal load wave.
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U2 - 10.1016/0013-7944(87)90228-1
DO - 10.1016/0013-7944(87)90228-1
M3 - Article
AN - SCOPUS:0023564981
VL - 28
SP - 345
EP - 360
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
SN - 0013-7944
IS - 3
ER -