An in situ neutron diffraction study of plastic deformation in Cu46.5Zr46.5Al7 bulk metallic glass composite

SCRIPTA MATERIALIA

卷:153

Article

Wang, D. M.^1,2,3  Chen, Y.²  Mu, J.¹  Zhu, Z. W.⁴  Zhang, H. F.⁴  Wang, Y. D.¹  An, K.² 

[1] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Liaoning, Peoples R China

[2] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Shull Wollan Ctr, Oak Ridge, IN 37831 USA

[4] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

关键词: Bulk metallic glass composite;    In situ neutron diffraction;    Micro-mechanical behaviors;    Amorphous;    Load transfer;   

DOI  :  10.1016/j.scriptamat.2018.05.012

来源: Elsevier

【 摘 要 】

Micro-mechanical behaviors of a Cu46.5Zr46.5Al7 bulk metallic glass composite in the plastic regime were investigated by continuous in situ neutron diffraction during compression. Three stages of the plastic deformation were observed according to the work-hardening rate. The underlying natures of the work hardening, correlating with the lattice/microscopic strain evolution, are revealed for the three stages: (1) the initiation of shear bands, (2) the phase load transferring from the amorphous phase to the B2 phase and (3) the accelerated martensitic transformation and the work hardening of the polycrystalline phases promoted by the rapid propagation of the shear bands. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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