TY - JOUR
T1 - Temperature Independences of Fatigue Crack Growth in Ti0.49 mass%O
AU - Okuyama, Yelm
AU - Tanaka, Masaki
AU - Morikawa, Tatsuya
N1 - Publisher Copyright:
© 2022 The Japan Institute of Metals and Materials.
PY - 2022
Y1 - 2022
N2 - The temperature dependence of fatigue crack growth in stage IIb was investigated in Ti0.49 mass%O with an alpha single phase. It was found that the fatigue crack growth rate in stage IIb was temperature independent at temperatures above 300 K. EBSD maps beside the fatigue crack showed that prismatic slips with (a) dislocations were dominantly activated during the fatigue crack growth. The reason why the prismatic slips were dominantly activated is discussed with numerical crystal plasticity analysis. It was shown that the local strain rate at the notch tip was higher than the macroscopic strain rate, which leads to the suppression of non-prismatic slips at the fatigue crack tip.
AB - The temperature dependence of fatigue crack growth in stage IIb was investigated in Ti0.49 mass%O with an alpha single phase. It was found that the fatigue crack growth rate in stage IIb was temperature independent at temperatures above 300 K. EBSD maps beside the fatigue crack showed that prismatic slips with (a) dislocations were dominantly activated during the fatigue crack growth. The reason why the prismatic slips were dominantly activated is discussed with numerical crystal plasticity analysis. It was shown that the local strain rate at the notch tip was higher than the macroscopic strain rate, which leads to the suppression of non-prismatic slips at the fatigue crack tip.
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U2 - 10.2320/matertrans.MT-M2021211
DO - 10.2320/matertrans.MT-M2021211
M3 - Article
AN - SCOPUS:85127887649
SN - 1345-9678
VL - 63
SP - 600
EP - 606
JO - Materials Transactions
JF - Materials Transactions
IS - 4
ER -