Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La                         62                         Cu                         12                         Ni                         12                         Al                         14                          Bulk Metallic Glass

Jing Guo; Soo Hyun Joo; Donghai Pi; Wooyeol Kim; Yuepeng Song; Hyoung Seop Kim; Xiaohui Zhang; Dan Kong

doi:10.1002/adem.201800918

Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass

Jing Guo, Soo Hyun Joo, Donghai Pi, Wooyeol Kim, Yuepeng Song, Hyoung Seop Kim, Xiaohui Zhang, Dan Kong

Materials Development Division

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

3 Citations (Scopus)

Abstract

Even though bulk metallic glasses (BMGs) are generally brittle, they receive large plastic deformations of over 1000% shear strain without fracturing through the application of combined shear and hydrostatic stresses. In this study, the effects of the severe plastic deformation by high-pressure torsion (HPT) on the thermal and mechanical properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ BMG are investigated. Crystallization is not detected during the HPT processes with 5, 15, and 30 revolutions. However, increase in glass transition temperature, crystallization temperature, fracture strength, and fracture strain, and decrease in the coefficient of thermal expansion and hardness due to the HPT process are found. These changes in the properties are attributable to the increased free volume that results from the rejuvenated structure in the HPT-processed BMG. In addition, the fracture in the HPT-processed La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ BMG proceeds through a softening mechanism in the microscale region.

Original language	English
Article number	1800918
Journal	Advanced Engineering Materials
Volume	21
Issue number	3
DOIs	https://doi.org/10.1002/adem.201800918
Publication status	Published - 2019 Mar

Keywords

fracture
hardness
high-pressure torsion
thermal expansion

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1002/adem.201800918

Cite this

Guo, J., Joo, S. H., Pi, D., Kim, W., Song, Y., Kim, H. S., Zhang, X., & Kong, D. (2019). Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass Advanced Engineering Materials, 21(3), [1800918]. https://doi.org/10.1002/adem.201800918

Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass . / Guo, Jing; Joo, Soo Hyun; Pi, Donghai et al.

In: Advanced Engineering Materials, Vol. 21, No. 3, 1800918, 03.2019.

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

Guo, J, Joo, SH, Pi, D, Kim, W, Song, Y, Kim, HS, Zhang, X & Kong, D 2019, ' Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass ', Advanced Engineering Materials, vol. 21, no. 3, 1800918. https://doi.org/10.1002/adem.201800918

Guo J, Joo SH, Pi D, Kim W, Song Y, Kim HS et al. Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass Advanced Engineering Materials. 2019 Mar;21(3). 1800918. https://doi.org/10.1002/adem.201800918

Guo, Jing ; Joo, Soo Hyun ; Pi, Donghai et al. / Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La ₆₂ Cu ₁₂ Ni ₁₂ Al ₁₄ Bulk Metallic Glass In: Advanced Engineering Materials. 2019 ; Vol. 21, No. 3.

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title = " Effect of High-Pressure Torsion on the Thermal and Mechanical Properties of La 62 Cu 12 Ni 12 Al 14 Bulk Metallic Glass ",

abstract = " Even though bulk metallic glasses (BMGs) are generally brittle, they receive large plastic deformations of over 1000% shear strain without fracturing through the application of combined shear and hydrostatic stresses. In this study, the effects of the severe plastic deformation by high-pressure torsion (HPT) on the thermal and mechanical properties of La 62 Cu 12 Ni 12 Al 14 BMG are investigated. Crystallization is not detected during the HPT processes with 5, 15, and 30 revolutions. However, increase in glass transition temperature, crystallization temperature, fracture strength, and fracture strain, and decrease in the coefficient of thermal expansion and hardness due to the HPT process are found. These changes in the properties are attributable to the increased free volume that results from the rejuvenated structure in the HPT-processed BMG. In addition, the fracture in the HPT-processed La 62 Cu 12 Ni 12 Al 14 BMG proceeds through a softening mechanism in the microscale region. ",

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author = "Jing Guo and Joo, {Soo Hyun} and Donghai Pi and Wooyeol Kim and Yuepeng Song and Kim, {Hyoung Seop} and Xiaohui Zhang and Dan Kong",

note = "Funding Information: This work was supported by science foundation for the excellent youth scholars of Shandong Province of China (Grant No. ZR2016JL019), the national research foundation of Korea through the Korea-China young scientist exchange program, special support for post-doc creative funding in Shangdong Province and outstanding young talent fund of Shandong Agricultural University. Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Zhang, Xiaohui

AU - Kong, Dan

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N2 - Even though bulk metallic glasses (BMGs) are generally brittle, they receive large plastic deformations of over 1000% shear strain without fracturing through the application of combined shear and hydrostatic stresses. In this study, the effects of the severe plastic deformation by high-pressure torsion (HPT) on the thermal and mechanical properties of La 62 Cu 12 Ni 12 Al 14 BMG are investigated. Crystallization is not detected during the HPT processes with 5, 15, and 30 revolutions. However, increase in glass transition temperature, crystallization temperature, fracture strength, and fracture strain, and decrease in the coefficient of thermal expansion and hardness due to the HPT process are found. These changes in the properties are attributable to the increased free volume that results from the rejuvenated structure in the HPT-processed BMG. In addition, the fracture in the HPT-processed La 62 Cu 12 Ni 12 Al 14 BMG proceeds through a softening mechanism in the microscale region.

AB - Even though bulk metallic glasses (BMGs) are generally brittle, they receive large plastic deformations of over 1000% shear strain without fracturing through the application of combined shear and hydrostatic stresses. In this study, the effects of the severe plastic deformation by high-pressure torsion (HPT) on the thermal and mechanical properties of La 62 Cu 12 Ni 12 Al 14 BMG are investigated. Crystallization is not detected during the HPT processes with 5, 15, and 30 revolutions. However, increase in glass transition temperature, crystallization temperature, fracture strength, and fracture strain, and decrease in the coefficient of thermal expansion and hardness due to the HPT process are found. These changes in the properties are attributable to the increased free volume that results from the rejuvenated structure in the HPT-processed BMG. In addition, the fracture in the HPT-processed La 62 Cu 12 Ni 12 Al 14 BMG proceeds through a softening mechanism in the microscale region.

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