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

D. M. Wang; Y. Chen; J. Mu; Z. W. Zhu; H. F. Zhang; Y. D. Wang; K. An

doi:10.1016/j.scriptamat.2018.05.012

An in situ neutron diffraction study of plastic deformation in a Cu_46.5Zr_46.5Al₇ bulk metallic glass composite

D. M. Wang, Y. Chen, J. Mu, Z. W. Zhu, H. F. Zhang, Y. D. Wang, K. An

Materials Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Micro-mechanical behaviors of a Cu_46.5Zr_46.5Al₇ 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.

Original language	English
Pages (from-to)	118-121
Number of pages	4
Journal	Scripta Materialia
Volume	153
DOIs	https://doi.org/10.1016/j.scriptamat.2018.05.012
State	Published - Aug 2018

Funding

In situ neutron diffraction experiments were carried out at SNS, ORNL, supported by the U.S. Department of Energy, Basic Energy Sciences, Scientific User Facilities Division. D.M. Wang is grateful for the financial support provided by the China Scholarship Council (CSC) during the visit to ORNL and the University of Tennessee , Knoxville (UTK). Y.D Wang, J. Mu and D.M. Wang acknowledge the financial support from the National Natural Science Foundation of China (NSFC) (Grant Nos. 51771049 and 5179480014 ), and State Key Lab of Advanced Metals and Materials (No. 2016-Z06 ). The authors thank Mr. M. Frost, Mr. H. Skorpenske from ORNL, Mr. T.K. Liu from the UTK and Dr. H.M. Fu, Mr. D.M. Liu, Mr. S. Chen, Mr. H.Y. Lu and Mr. S.F. Lin from Shenyang Chinese Academy of Sciences for their technical assistance in this research. Appendix A

Keywords

Amorphous
Bulk metallic glass composite
In situ neutron diffraction
Load transfer
Micro-mechanical behaviors

Access to Document

10.1016/j.scriptamat.2018.05.012

Cite this

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title = "An in situ neutron diffraction study of plastic deformation in a Cu46.5Zr46.5Al7 bulk metallic glass composite",

abstract = "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.",

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AB - 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.

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