TY - JOUR
T1 - Importance of crack-propagation-induced ε-martensite in strain-controlled low-cycle fatigue of high-Mn austenitic steel
AU - Li, Huichao
AU - Koyama, Motomichi
AU - Sawaguchi, Takahiro
AU - Tsuzaki, Kaneaki
AU - Noguchi, Hiroshi
N1 - Publisher Copyright:
© 2015 Taylor & Francis.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/6/3
Y1 - 2015/6/3
N2 - We investigated the roles of deformation-induced ε-martensitic transformation on strain-controlled low-cycle fatigue (LCF) through crack-propagation analysis involving a notching technique that used a focused ion beam (FIB) setup on Fe-30Mn-4Si-2Al austenitic steel. Using the FIB notch, we separated the microstructure evolution into macroscopic cyclic deformation-induced and crack-propagation-induced microstructures. Following this, we clarified the fatigue crack-propagation-induced ε-martensitic transformation to decelerate crack propagation at a total strain range of 2%, obtaining an extraordinary LCF life of 1.1 × 104 cycles.
AB - We investigated the roles of deformation-induced ε-martensitic transformation on strain-controlled low-cycle fatigue (LCF) through crack-propagation analysis involving a notching technique that used a focused ion beam (FIB) setup on Fe-30Mn-4Si-2Al austenitic steel. Using the FIB notch, we separated the microstructure evolution into macroscopic cyclic deformation-induced and crack-propagation-induced microstructures. Following this, we clarified the fatigue crack-propagation-induced ε-martensitic transformation to decelerate crack propagation at a total strain range of 2%, obtaining an extraordinary LCF life of 1.1 × 104 cycles.
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U2 - 10.1080/09500839.2015.1052029
DO - 10.1080/09500839.2015.1052029
M3 - Article
AN - SCOPUS:84938555196
SN - 0950-0839
VL - 95
SP - 303
EP - 311
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 6
ER -