Achieving ultrahigh fatigue resistance in AlSi10Mg alloy by additive manufacturing

被引：57
|
作者：
Dan, Chengyi [1 ,2 ]
Cui, Yuchi [1 ]
Wu, Yi [2 ]
Chen, Zhe [1 ,2 ]
Liu, Hui [3 ]
Ji, Gang [4 ]
Xiao, Yakai [2 ]
Chen, Han [2 ]
Wang, Mingliang [1 ]
Liu, Jun [2 ]
Wang, Lei [2 ]
Li, Yang [2 ]
Addad, Ahmed [4 ]
Zhou, Ying [2 ]
Ma, Siming [2 ]
Shi, Qiwei [2 ]
Wang, Haowei [1 ,2 ]
Lu, Jian [3 ,5 ,6 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
[4] Univ Lille, CNRS, INRA, ENSCL,UMR 8207 UMET Unite Mat & Transformat, Lille, France
[5] Shenyang Natl Lab Mat Sci, City Univ Hong Kong Shenzhen Res Inst, Ctr Adv Struct Mat, Greater Bay Joint Div, Shenzhen, Peoples R China
[6] CityU Shenzhen Futian Res Inst, Shenzhen, Peoples R China
来源：
NATURE MATERIALS | 2023年 / 22卷 / 10期
基金：
中国国家自然科学基金;
关键词：
HIGH-CYCLE FATIGUE; LASER; STRENGTH; MICROSTRUCTURE; MECHANISMS; BEHAVIOR; POROSITY; FAILURE;
D O I：
10.1038/s41563-023-01651-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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. An ultrahigh fatigue-resistant AlSi10Mg alloy is achieved by additive manufacturing, with its three-dimensional dual-phase cellular nanostructure acting as a strong volumetric nanocage to inhibit fatigue damage accumulation.
引用
收藏
页码：1182 / +
页数：19
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