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Title: Understanding the deformation mechanism of individual phases of a ZrTi-based bulk metallic glass matrix composite using in situ diffraction and imaging methods

The plasticity of a ZrTi-based bulk metallic glass composite consisting of glassy matrix and crystalline dendritic phase was studied in-situ under identical tensile loading conditions using scanning electron microscopy and synchrotron X-ray diffraction. A generic procedure was developed to separate the diffraction information of the crystalline phases away from that of the matrix and to precisely calculate the microscopic strains of the two phases at different macroscopic load steps. In this way, the time-evolved quantitative links between shear bands nucleation/propagation and the corresponding microscopic stress fields around them are established, providing more quantitative understanding on (1) how the shear bands are driven by the local stress field, and (2) the critical stresses required for the shear bands to nucleate in the crystalline phase, propagate through the crystalline/matrix interface, and finally into the matrix.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4]
  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin (China)
  2. (United Kingdom)
  3. School of Engineering, University of Hull, East Yorkshire (United Kingdom)
  4. I12 JEEP Beamline, Diamond Light Source, Oxfordshire (United Kingdom)
Publication Date:
OSTI Identifier:
22280580
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; DEFORMATION; DENDRITES; INTERFACES; MATRIX MATERIALS; METALLIC GLASSES; NUCLEATION; PLASTICITY; SCANNING ELECTRON MICROSCOPY; SHEAR PROPERTIES; STRAINS; STRESSES; SYNCHROTRON RADIATION; TITANIUM ALLOYS; X-RAY DIFFRACTION; ZIRCONIUM ALLOYS