TY - JOUR
T1 - Achieving ultrahigh fatigue resistance in AlSi10Mg alloy by additive manufacturing
AU - Dan, Chengyi
AU - Cui, Yuchi
AU - Wu, Yi
AU - Chen, Zhe
AU - Liu, Hui
AU - Ji, Gang
AU - Xiao, Yakai
AU - Chen, Han
AU - Wang, Mingliang
AU - Liu, Jun
AU - Wang, Lei
AU - Li, Yang
AU - Addad, Ahmed
AU - Zhou, Ying
AU - Ma, Siming
AU - Shi, Qiwei
AU - Wang, Haowei
AU - Lu, Jian
PY - 2023/10
Y1 - 2023/10
N2 - Since the first discovery of the fatigue phenomenon in the late 1830s, efforts to fight against fatigue failure have continued. Here we report a fatigue resistance phenomenon in nano-TiB2-decorated AlSi10Mg enabled by additive manufacturing. This fatigue resistance mechanism benefits from the three-dimensional dual-phase cellular nanostructure, which acts as a strong volumetric nanocage to prevent localized damage accumulation, thus inhibiting fatigue crack initiation. The intrinsic fatigue strength limit of nano-TiB2-decorated AlSi10Mg was proven to be close to its tensile strength through the in situ fatigue tests of a defect-free microsample. To demonstrate the practical applicability of this mechanism, printed bulk nano-TiB2-decorated AlSi10Mg achieved fatigue resistance more than double those of other additive manufacturing Al alloys and surpassed those of high-strength wrought Al alloys. This strategy of additive-manufacturing-assisted nanostructure engineering can be extended to the development of other dual-phase fatigue-resistant metals. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.
AB - Since the first discovery of the fatigue phenomenon in the late 1830s, efforts to fight against fatigue failure have continued. Here we report a fatigue resistance phenomenon in nano-TiB2-decorated AlSi10Mg enabled by additive manufacturing. This fatigue resistance mechanism benefits from the three-dimensional dual-phase cellular nanostructure, which acts as a strong volumetric nanocage to prevent localized damage accumulation, thus inhibiting fatigue crack initiation. The intrinsic fatigue strength limit of nano-TiB2-decorated AlSi10Mg was proven to be close to its tensile strength through the in situ fatigue tests of a defect-free microsample. To demonstrate the practical applicability of this mechanism, printed bulk nano-TiB2-decorated AlSi10Mg achieved fatigue resistance more than double those of other additive manufacturing Al alloys and surpassed those of high-strength wrought Al alloys. This strategy of additive-manufacturing-assisted nanostructure engineering can be extended to the development of other dual-phase fatigue-resistant metals. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85168125196&origin=recordpage
U2 - 10.1038/s41563-023-01651-9
DO - 10.1038/s41563-023-01651-9
M3 - RGC 21 - Publication in refereed journal
SN - 1476-1122
VL - 22
SP - 1182
EP - 1188
JO - Nature Materials
JF - Nature Materials
ER -
