Effects of severe plastic deformation on the structure and thermo-mechanical properties of Zr55Cu30Al10Ni5 bulk metallic glass

Steenberge, N. Van; Hóbor, S.; Suriñach, S.; Zhilyaev, Alexander P.; Houdellier, Florent; Mompiou, Frédéric; Baró, Maria Dolores; Révész, Ádám; Sort, Jordi

doi:10.1016/j.jallcom.2010.03.195

Cited by 31 publications

(14 citation statements)

References 45 publications

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“…Recently, the nanocrystallization of some metallic glasses after the HPT process has been reported20212238394041. However, other reports have not shown any phase transformation during the HPT process18194243.…”

Section: Discussionmentioning

confidence: 99%

“…Because of its ability to impose extremely high strains compared to other severe plastic deformation (SPD) processes, there have been several studies on HPT-processed BMGs (HPT-BMGs) and amorphous ribbons, as well as polycrystalline materials1819202122. Nevertheless, mechanical property changes due to altered microstructures in HPT-BMGs are not clearly understood.…”

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confidence: 99%

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Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Joo

Setyawan

et al. 2015

Sci Rep

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The mechanical properties of engineering materials are key for ensuring safety and reliability. However, the plastic deformation of BMGs is confined to narrow regions in shear bands, which usually result in limited ductilities and catastrophic failures at low homologous temperatures. The quasi-brittle failure and lack of tensile ductility undercut the potential applications of BMGs. In this report, we present clear tensile ductility in a Zr-based BMG via a high-pressure torsion (HPT) process. Enhanced tensile ductility and work-hardening behavior after the HPT process were investigated, focusing on the microstructure, particularly the changed free volume, which affects deformation mechanisms (i.e., initiation, propagation, and obstruction of shear bands). Our results provide insights into the basic functions of hydrostatic pressure and shear strain in the microstructure and mechanical properties of HPT-processed BMGs.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Joo

Setyawan

et al. 2015

Sci Rep

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“…The results are attributed to the increase in the free volume that results from the structural rejuvenation after the large shear deformation of HPT. A report of Zr‐based bulk metallic glass after severe plastic deformation has shown that HPT increases the net excess free volume in amorphous structure . Moreover, the relaxation exotherm in HPT disk is more obvious than that in as‐cast and undeformed state.…”

Section: Resultsmentioning

confidence: 99%

Effect of High‐Pressure Torsion on the Thermal and Mechanical Properties of La₆₂Cu₁₂Ni₁₂Al₁₄ Bulk Metallic Glass

Guo

Joo

et al. 2018

Adv Eng Mater

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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

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“…With the applied strain during the following HPT step the material becomes homogenous. SPD was already used to deform bulk metallic glass samples and even metal-metallic glass composites were obtained [21][22][23][24][25]. The aim of this study was to produce bulk metallic glass samples with SPD.…”

Section: Introductionmentioning

confidence: 99%

Production of Bulk Metallic Glasses by Severe Plastic Deformation

Krämer

Kormout

Setman

et al. 2015

Metals

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The aim of this study was to show the possibility to produce bulk metallic glass with severe plastic deformation. High pressure torsion was used to consolidate Zr-based metallic glass powder and deform it further to weld the powder particles together. The produced samples were investigated with Scanning electron microscope (SEM), Transmission electron microscope (TEM), Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) to check if the specimens are fully dense and have an amorphous structure. The results show that the specimens remain amorphous during high pressure torsion and the density depends on the applied strain. Additional Vickers hardness measurements enable a comparison with literature and show for Zr-based metallic glass powder typical values (approximately 500 HV).

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Effects of severe plastic deformation on the structure and thermo-mechanical properties of Zr55Cu30Al10Ni5 bulk metallic glass

Cited by 31 publications

References 45 publications

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Effect of High‐Pressure Torsion on the Thermal and Mechanical Properties of La₆₂Cu₁₂Ni₁₂Al₁₄ Bulk Metallic Glass

Production of Bulk Metallic Glasses by Severe Plastic Deformation

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Effects of severe plastic deformation on the structure and thermo-mechanical properties of Zr55Cu30Al10Ni5 bulk metallic glass

Cited by 31 publications

References 45 publications

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

Effect of High‐Pressure Torsion on the Thermal and Mechanical Properties of La62Cu12Ni12Al14 Bulk Metallic Glass

Production of Bulk Metallic Glasses by Severe Plastic Deformation

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Effect of High‐Pressure Torsion on the Thermal and Mechanical Properties of La₆₂Cu₁₂Ni₁₂Al₁₄ Bulk Metallic Glass