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

Abstract

Here, 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.

Authors:
 [1];  [2];  [3];  [3];  [2];  [4];  [4];  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Sejong Univ., Seoul (South Korea)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376396
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 723; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Metallic glass; Composite; Deformation; Martensitic transformation; Neutron diffraction

Citation Formats

Song, Gian, Lee, Chanho, Hong, Sung Hwan, Kim, Ki Buem, Chen, Shuying, Ma, Dong, An, Ke, and Liaw, Peter K. Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction. United States: N. p., 2017. Web. doi:10.1016/j.jallcom.2017.06.270.
Song, Gian, Lee, Chanho, Hong, Sung Hwan, Kim, Ki Buem, Chen, Shuying, Ma, Dong, An, Ke, & Liaw, Peter K. Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction. United States. doi:10.1016/j.jallcom.2017.06.270.
Song, Gian, Lee, Chanho, Hong, Sung Hwan, Kim, Ki Buem, Chen, Shuying, Ma, Dong, An, Ke, and Liaw, Peter K. Tue . "Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction". United States. doi:10.1016/j.jallcom.2017.06.270.
@article{osti_1376396,
title = {Martensitic transformation in a B2-containing CuZr-based BMG composite revealed by in situ neutron diffraction},
author = {Song, Gian and Lee, Chanho and Hong, Sung Hwan and Kim, Ki Buem and Chen, Shuying and Ma, Dong and An, Ke and Liaw, Peter K.},
abstractNote = {Here, 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.},
doi = {10.1016/j.jallcom.2017.06.270},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 723,
place = {United States},
year = {Tue Jun 27 00:00:00 EDT 2017},
month = {Tue Jun 27 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 27, 2018
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