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Title: Tensile deformation mechanisms of an in-situ Ti-based metallic glass matrix composite at cryogenic temperature

Remarkable tensile ductility was first obtained in an in-situ Ti-based bulk metallic glass (BMG) composite at cryogenic temperature (77 K). The novel cryogenic tensile plasticity is related to the effective accommodation of ductile body-centered cubic dendrites at 77 K, characteristic of the prevailing slip bands and dislocations, as well as lattice disorder, which can effectively hinder the propagation of critical shear bands. The greatly increased yield strength of dendrites contributes to the high yield strength of composite at 77 K. A trend of stronger softening is observed at low temperature, and a criterion is proposed to understand the softening behavior. In conclusion, the current research could also provide a guidance to the promising cryogenic application of these new advanced BMG composites.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [2] ;  [4]
  1. Northwest Polytechnical Univ., Xi'an (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Northwest Polytechnical Univ., Xi'an (China)
  3. Taiyuan Univ. of Technology, Taiyuan (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Grant/Contract Number:
FE0008855
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; composite; glasses; mechanical properties
OSTI Identifier:
1361391