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

DOI: 10.1063/1.4863095 DOI Help

Authors: Yongjiang Huang (School of Materials Science and Engineering, Harbin Institute of Technology, Harbin) , Jia Chuan Khong (University of Hull) , Thomas Connolley (Diamond Light Source) , Jiawei Mi (University of Hull)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 104 (3) , PAGES 17C109

State: Published (Approved)
Published: January 2014
Diamond Proposal Number(s): 7665

Abstract: 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.

Journal Keywords: 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

Subject Areas: Materials

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing