Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction

Gian Song; Chanho Lee; Sung Hwan Hong; Ki Buem Kim; Shuying Chen; Dong Ma; Ke An; Peter K. Liaw

doi:10.1016/j.jallcom.2017.06.270

Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction

Gian Song, Chanho Lee, Sung Hwan Hong, Ki Buem Kim, Shuying Chen, Dong Ma, Ke An, Peter K. Liaw

Materials Engineering

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

19 Scopus citations

Abstract

CuZr-based bulk-metallic-glass (BMG) composites reinforced by a B2-type CuZr crystalline-phase (CP) have been widely studied, and exhibit that the plastic deformation of the CP induces martensitic transformation from the B2 to B19′, which plays a dominant role in the deformation behavior and mechanical properties. In the present study, 2.0% Co containing CuZr-based BMG composites were investigated using in-situ neutron-diffraction technique. The in-situ neutron-diffraction results reveal the continuous load transfer from the glass matrix to B2 CP and martensitic transformation from the B2 CP to B19′ during the deformation of the composite. Moreover, it was found that the martensitic transformation is initiated at the applied stress higher than 1500 MPa, and is significantly suppressed during the deformation, as compared to other 0.5% Co-containing CuZr-based BMG composites. Based on these in-situ neutron-diffraction results, the martensitic transformation is strongly affected by the amount of the addition of Co, which determines the mechanical properties of CP-reinforced BMG composites, such as ductility and hardening capability.

Original language	English
Pages (from-to)	714-721
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	723
DOIs	https://doi.org/10.1016/j.jallcom.2017.06.270
State	Published - 2017

Funding

The in-situ neutron experiments at ORNL's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. We would like to acknowledge the support of the Department of Energy (DOE), Office of Fossil Energy, National Energy Technology Laboratory (DE-FE-0008855, DE-FE-0024054, and DE-FE-0011194), with Mr. V. Cedro, Mr. R. Dunst, Dr. P. Rawls, and Dr. J. Mullen as program managers. We very much appreciate the support of the U.S. Army Research Office project (W911NF-13-1-0438) with the program manager, Dr. D. M. Stepp. We thank the support from the National Science Foundation (DMR-1611180) with the program director, Dr. D. Farkas. We would like to thank QuesTek Innovations LLC under Award No. DE-SC0013220 with Dr. J. Saal as the program manager.

Keywords

Composite
Deformation
Martensitic transformation
Metallic glass
Neutron diffraction

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10.1016/j.jallcom.2017.06.270

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title = "Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction",

abstract = "CuZr-based bulk-metallic-glass (BMG) composites reinforced by a B2-type CuZr crystalline-phase (CP) have been widely studied, and exhibit that the plastic deformation of the CP induces martensitic transformation from the B2 to B19′, which plays a dominant role in the deformation behavior and mechanical properties. In the present study, 2.0% Co containing CuZr-based BMG composites were investigated using in-situ neutron-diffraction technique. The in-situ neutron-diffraction results reveal the continuous load transfer from the glass matrix to B2 CP and martensitic transformation from the B2 CP to B19′ during the deformation of the composite. Moreover, it was found that the martensitic transformation is initiated at the applied stress higher than 1500 MPa, and is significantly suppressed during the deformation, as compared to other 0.5% Co-containing CuZr-based BMG composites. Based on these in-situ neutron-diffraction results, the martensitic transformation is strongly affected by the amount of the addition of Co, which determines the mechanical properties of CP-reinforced BMG composites, such as ductility and hardening capability.",

keywords = "Composite, Deformation, Martensitic transformation, Metallic glass, Neutron diffraction",

author = "Gian Song and Chanho Lee and Hong, {Sung Hwan} and Kim, {Ki Buem} and Shuying Chen and Dong Ma and Ke An and Liaw, {Peter K.}",

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year = "2017",

doi = "10.1016/j.jallcom.2017.06.270",

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T1 - Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction

AU - Song, Gian

AU - Lee, Chanho

AU - Hong, Sung Hwan

AU - Kim, Ki Buem

AU - Chen, Shuying

AU - Ma, Dong

AU - An, Ke

AU - Liaw, Peter K.

PY - 2017

Y1 - 2017

N2 - CuZr-based bulk-metallic-glass (BMG) composites reinforced by a B2-type CuZr crystalline-phase (CP) have been widely studied, and exhibit that the plastic deformation of the CP induces martensitic transformation from the B2 to B19′, which plays a dominant role in the deformation behavior and mechanical properties. In the present study, 2.0% Co containing CuZr-based BMG composites were investigated using in-situ neutron-diffraction technique. The in-situ neutron-diffraction results reveal the continuous load transfer from the glass matrix to B2 CP and martensitic transformation from the B2 CP to B19′ during the deformation of the composite. Moreover, it was found that the martensitic transformation is initiated at the applied stress higher than 1500 MPa, and is significantly suppressed during the deformation, as compared to other 0.5% Co-containing CuZr-based BMG composites. Based on these in-situ neutron-diffraction results, the martensitic transformation is strongly affected by the amount of the addition of Co, which determines the mechanical properties of CP-reinforced BMG composites, such as ductility and hardening capability.

AB - CuZr-based bulk-metallic-glass (BMG) composites reinforced by a B2-type CuZr crystalline-phase (CP) have been widely studied, and exhibit that the plastic deformation of the CP induces martensitic transformation from the B2 to B19′, which plays a dominant role in the deformation behavior and mechanical properties. In the present study, 2.0% Co containing CuZr-based BMG composites were investigated using in-situ neutron-diffraction technique. The in-situ neutron-diffraction results reveal the continuous load transfer from the glass matrix to B2 CP and martensitic transformation from the B2 CP to B19′ during the deformation of the composite. Moreover, it was found that the martensitic transformation is initiated at the applied stress higher than 1500 MPa, and is significantly suppressed during the deformation, as compared to other 0.5% Co-containing CuZr-based BMG composites. Based on these in-situ neutron-diffraction results, the martensitic transformation is strongly affected by the amount of the addition of Co, which determines the mechanical properties of CP-reinforced BMG composites, such as ductility and hardening capability.

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ER -

Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction

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