Microstructural hardness heterogeneity triggers fatigue crack non-propagation in as-hot-rolled Fe-30Mn-3Si-3Al twinning-induced plasticity steel

Microstructural hardness heterogeneity triggers fatigue crack non-propagation in as-hot-rolled... •The as-hot-rolled TWIP steel showed higher fatigue strength than the solution-treated steel.•The as-hot-rolled steel showed a non-propagating fatigue crack at the fatigue limit.•The fatigue crack stopped when propagating from soft to hard regions.•According to Dugdale model simulations, the hardness heterogeneity reduces ΔKeff.•The high resistance to fatigue crack growth is associated with hardness heterogeneity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Fatigue Elsevier

Microstructural hardness heterogeneity triggers fatigue crack non-propagation in as-hot-rolled Fe-30Mn-3Si-3Al twinning-induced plasticity steel

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0142-1123
eISSN
1879-3452
D.O.I.
10.1016/j.ijfatigue.2017.11.009
Publisher site
See Article on Publisher Site

Abstract

•The as-hot-rolled TWIP steel showed higher fatigue strength than the solution-treated steel.•The as-hot-rolled steel showed a non-propagating fatigue crack at the fatigue limit.•The fatigue crack stopped when propagating from soft to hard regions.•According to Dugdale model simulations, the hardness heterogeneity reduces ΔKeff.•The high resistance to fatigue crack growth is associated with hardness heterogeneity.

Journal

International Journal of FatigueElsevier

Published: Mar 1, 2018

References

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