Bone-like crack resistance in hierarchical metastable nanolaminate steels

Motomichi Koyama, Zhao Zhang, Meimei Wang, Dirk Ponge, Dierk Raabe, Kaneaki Tsuzaki, Hiroshi Noguchi, Cemal Cem Tasan

研究成果: Contribution to journalArticle査読

160 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)1055-1057
ページ数3
ジャーナルScience
355
6329
DOI
出版ステータス出版済み - 3 10 2017

All Science Journal Classification (ASJC) codes

  • General

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