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Title: Structural evolution in Ti-Cu-Ni metallic glasses during heating

The structural evolution of Ti{sub 50}Cu{sub 43}Ni{sub 7} and Ti{sub 55}Cu{sub 35}Ni{sub 10} metallic glasses during heating was investigated by in-situ synchrotron X-ray diffraction. The width of the most intense diffraction maximum of the glassy phase decreases slightly during relaxation below the glass transition temperature. Significant structural changes only occur above the glass transition manifesting in a change in the respective peak positions. At even higher temperatures, nanocrystals of the shape memory B2-Ti(Cu,Ni) phase precipitate, and their small size hampers the occurrence of a martensitic transformation.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [3] ;  [4] ;  [1] ;  [5]
  1. IFW Dresden, Institut für Komplexe Materialien, Helmholtzstraße 20, D-01069 Dresden (Germany)
  2. (Brazil)
  3. European Synchrotron Radiation Facilities, BP 220, 38043 Grenoble (France)
  4. Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Rodovia Washington Luiz, Km 235, 13565-905 São Carlos, São Paulo (Brazil)
  5. (Germany)
Publication Date:
OSTI Identifier:
22415243
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL materials; Journal Volume: 3; Journal Issue: 1; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER ALLOYS; GLASS; HEATING; MARTENSITE; METALLIC GLASSES; NANOSTRUCTURES; NICKEL ALLOYS; PHASE TRANSFORMATIONS; PRECIPITATION; RELAXATION; SHAPE MEMORY EFFECT; SYNCHROTRON RADIATION; TEMPERATURE DEPENDENCE; TITANIUM BASE ALLOYS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION