TY - JOUR
T1 - Bone-like crack resistance in hierarchical metastable nanolaminate steels
AU - Koyama, Motomichi
AU - Zhang, Zhao
AU - Wang, Meimei
AU - Ponge, Dirk
AU - Raabe, Dierk
AU - Tsuzaki, Kaneaki
AU - Noguchi, Hiroshi
AU - Tasan, Cemal Cem
N1 - Funding Information:
This work was financially supported by KAKENHI (Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science; 15K18235 and 16H06365), the European Research Council (ERC) under the European Union's 7th Framework Programme (FP7/2007-2013, ERC Advanced Grant agreement 290998), and the Department of Materials Science and Engineering of the Massachusetts Institute of Technology. C.C.T. and M.K. designed the research; Z.Z. and M.W. were the lead experimental scientists; and M.K. and C.C.T. wrote the paper. All authors discussed the results and commented on the manuscript. The authors declare no conflicts of interest.
Publisher Copyright:
© 2017, American Association for the Advancement of Science. All rights reserved.
PY - 2017/3/10
Y1 - 2017/3/10
N2 - Fatigue failures create enormous risks for all engineered structures, as well as for human lives, motivating large safety factors in design and, thus, inefficient use of resources. Inspired by the excellent fracture toughness of bone, we explored the fatigue resistance in metastability-assisted multiphase steels. We show here that when steel microstructures are hierarchical and laminated, similar to the substructure of bone, superior crack resistance can be realized. Our results reveal that tuning the interface structure, distribution, and phase stability to simultaneously activate multiple micromechanisms that resist crack propagation is key for the observed leap in mechanical response. The exceptional properties enabled by this strategy provide guidance for all fatigue-resistant alloy design efforts.
AB - Fatigue failures create enormous risks for all engineered structures, as well as for human lives, motivating large safety factors in design and, thus, inefficient use of resources. Inspired by the excellent fracture toughness of bone, we explored the fatigue resistance in metastability-assisted multiphase steels. We show here that when steel microstructures are hierarchical and laminated, similar to the substructure of bone, superior crack resistance can be realized. Our results reveal that tuning the interface structure, distribution, and phase stability to simultaneously activate multiple micromechanisms that resist crack propagation is key for the observed leap in mechanical response. The exceptional properties enabled by this strategy provide guidance for all fatigue-resistant alloy design efforts.
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U2 - 10.1126/science.aal2766
DO - 10.1126/science.aal2766
M3 - Article
C2 - 28280201
AN - SCOPUS:85014953898
SN - 0036-8075
VL - 355
SP - 1055
EP - 1057
JO - Science
JF - Science
IS - 6329
ER -