Nanoscale Structural Evolution and Anomalous Mechanical Response of Nanoglasses by Cryogenic Thermal Cycling
- City Univ. of Hong Kong (People's Republic of China)
- Chinese Academy of Sciences (CAS), Beijing (People's Republic of China). Inst. of Physics
- City Univ. of Hong Kong (People's Republic of China); Karlsruhe Inst. of Technology (KIT) (Germany)
- City Univ. of Hong Kong (People's Republic of China); Nanjing Univ. of Science and Technology (People's Republic of China)
- City Univ. of Hong Kong (People's Republic of China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Karlsruhe Inst. of Technology (KIT) (Germany)
One of the central themes in the amorphous materials research is to understand the nanoscale structural responses to mechanical and thermal agitations, the decoding of which is expected to provide new insights into the complex amorphous structural-property relationship. For common metallic glasses, their inherent atomic structural inhomogeneities can be rejuvenated and amplified by cryogenic thermal cycling, thus can be decoded from their responses to mechanical and thermal agitations. In this paper, we reported an anomalous mechanical response of a new kind of metallic glass (nanoglass) with nanoscale interface structures to cryogenic thermal cycling. As compared to those metallic glasses by liquid quenching, the Sc75Fe25 (at. %) nanoglass exhibits a decrease in the Young’s modulus but a significant increase in the yield strength after cryogenic cycling treatments. The abnormal mechanical property change can be attributed to the complex atomic rearrangements at the short- and medium- range orders due to the intrinsic nonuniformity of the nanoglass architecture. The present work gives a new route for designing high-performance metallic glassy materials by manipulating their atomic structures and helps for understanding the complex atomic structure–property relationship in amorphous materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- General Research Fund of Hong Kong; National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- CityU 7004686; CityU 8730038; 51671121
- OSTI ID:
- 1478113
- Journal Information:
- Nano Letters, Vol. 18, Issue 7; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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