Nanoscale Structural Evolution and Anomalous Mechanical Response of Nanoglasses by Cryogenic Thermal Cycling

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

View graph of relations

Author(s)

  • Wei-Hong Liu
  • B. A. Sun
  • Si Lan
  • Yang Tong
  • Horst Hahn

Detail(s)

Original languageEnglish
Pages (from-to)4188-4194
Journal / PublicationNano Letters
Volume18
Issue number7
Early online date5 Jun 2018
StatePublished - 11 Jul 2018

Abstract

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. Here, 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 Area(s)

  • atomic structures, cryogenic thermal treatment, metallic glasses, nanoglasses, structural evolution

Citation Format(s)

Nanoscale Structural Evolution and Anomalous Mechanical Response of Nanoglasses by Cryogenic Thermal Cycling. / Liu, Wei-Hong; Sun, B. A.; Gleiter, Herbert; Lan, Si; Tong, Yang; Wang, Xun-Li; Hahn, Horst; Yang, Yong; Kai, Ji-Jung; Liu, C. T.

In: Nano Letters, Vol. 18, No. 7, 11.07.2018, p. 4188-4194.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review