TY - JOUR
T1 - Microstructural hardness heterogeneity triggers fatigue crack non-propagation in as-hot-rolled Fe-30Mn-3Si-3Al twinning-induced plasticity steel
AU - Koyama, Motomichi
AU - Yamamura, Yusuke
AU - Sawaguchi, Takahiro
AU - Tsuzaki, Kaneaki
AU - Noguchi, Hiroshi
N1 - Funding Information:
Funding: This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI ( JP16H06365 ). The Materials Manufacturing and Engineering Station at the National Institute for Materials Science supported this work through the production of the samples.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3
Y1 - 2018/3
N2 - We investigated the fatigue properties and associated crack growth behaviors of as-hot-rolled and solution-treated Fe-30Mn-3Si-3Al twinning-induced plasticity (TWIP) steels. The as-hot-rolled TWIP steel showed a higher fatigue strength than that of the solution-treated steel. Moreover, the as-hot-rolled steel showed a non-propagating fatigue crack at the fatigue limit, while the solution-treated steel did not. The high resistance to fatigue crack growth cannot only be attributed to an increase in hardness, but is also associated with heterogeneous hardness distribution. The effect of hardness heterogeneity was numerically supported by Dugdale model-based simulations.
AB - We investigated the fatigue properties and associated crack growth behaviors of as-hot-rolled and solution-treated Fe-30Mn-3Si-3Al twinning-induced plasticity (TWIP) steels. The as-hot-rolled TWIP steel showed a higher fatigue strength than that of the solution-treated steel. Moreover, the as-hot-rolled steel showed a non-propagating fatigue crack at the fatigue limit, while the solution-treated steel did not. The high resistance to fatigue crack growth cannot only be attributed to an increase in hardness, but is also associated with heterogeneous hardness distribution. The effect of hardness heterogeneity was numerically supported by Dugdale model-based simulations.
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U2 - 10.1016/j.ijfatigue.2017.11.009
DO - 10.1016/j.ijfatigue.2017.11.009
M3 - Article
AN - SCOPUS:85034734334
VL - 108
SP - 18
EP - 24
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
ER -