Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1055-1057 |
| Number of pages | 3 |
| Journal | Science |
| Volume | 355 |
| Issue number | 6329 |
| DOIs | |
| Publication status | Published - Mar 10 2017 |
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Bone-like crack resistance in hierarchical metastable nanolaminate steels. / Koyama, Motomichi; Zhang, Zhao; Wang, Meimei; Ponge, Dirk; Raabe, Dierk; Tsuzaki, Kaneaki; Noguchi, Hiroshi; Tasan, Cemal Cem.
In: Science, Vol. 355, No. 6329, 10.03.2017, p. 1055-1057.Research output: Contribution to journal › Article
}
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
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.
UR - http://www.scopus.com/inward/record.url?scp=85014953898&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85014953898&partnerID=8YFLogxK
U2 - 10.1126/science.aal2766
DO - 10.1126/science.aal2766
M3 - Article
C2 - 28280201
AN - SCOPUS:85014953898
VL - 355
SP - 1055
EP - 1057
JO - Science
JF - Science
SN - 0036-8075
IS - 6329
ER -