Unraveling the microstructural heterogeneity and plasticity of Zr50Cu40Al10 bulk metallic glass by nanoindentation

Tao, Kaixiang; Li, F.C.; Liu, Y.H.; Pineda, Eloi; Song, Kaikai; Qiao, J.C.

doi:10.1016/j.ijplas.2022.103305

Cited by 42 publications

(5 citation statements)

References 93 publications

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“…To obtain the dynamic response of samples, the indenting process was performed through the nano-DMA mode under the tip frequency of 200 Hz. The details for dynamic characterization of MGs via the nanoindentation test are given in [28][29][30]. Afterwards, the wear properties of samples were studied by the scratching test with a 2D-transducer mode of nanoindentation system, in which the precise data was recorded in the lateral and normal directions.…”

Section: Methodsmentioning

confidence: 99%

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Gao,

He,

Rathan

et al. 2023

Mater. Res. Express

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Over recent years, metallic glass thin films (MGTFs) have found extensive applications in advanced micro-engineering systems. Consequently, there is a need to thoroughly assess the nanomechanical and tribological behaviors of MGTFs to optimize the design of efficient components. In this study, we employed the nanoindentation technique in various modes to investigate the elastic heterogeneity, tribological response, and mechanical properties of CuZr amorphous films. Before conducting the mechanical tests, annealing treatments at 500 K and 600 K were performed to create samples with different stored energies. The thermal history analysis revealed that the annealing process reduced the stored energy in the microstructure. Furthermore, the pre-annealing treatment resulted in increased hardness and Young's modulus of the thin films. Additionally, higher annealing temperatures significantly improved the wear resistance of the MGTFs. Observing the serration dynamics in the scratching test, we noticed that the annealing treatment induced larger shear bands on the wear track side. Moreover, the increase in annealing temperature led to a reduction in elastic heterogeneity, which was consistent with the enthalpy relaxation values in the samples. This suggests that the annealing temperature enhanced the densely packed atomic structure, leading to the stabilization of the thin films.

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Section: Methodsmentioning

confidence: 99%

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Gao,

He,

Rathan

et al. 2023

Mater. Res. Express

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show abstract

“…Due to their amorphous structures, metallic glasses (MGs) exhibit excellent mechanical and physical properties, such as high strength, high hardness, and wear resistance (Hufnagel et al, 2016;Lai et al, 2019;Yang et al, 2019;Tao et al, 2022;Zhang et al, 2023). However, at room temperature, they undergo non-uniform and highly localized deformation in a narrow region called the shear band.…”

Section: Introductionmentioning

confidence: 99%

Effect of cyclic compression on the micromechanical properties of a Zr-based metallic glass

Wang,

Zhu

et al. 2024

Front. Mater.

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In this study, the effect of cyclic compression on the micromechanical properties of a Zr-based metallic glass (MG) was investigated via nanoindentation. Cyclic compression significantly softened the surface of the sample, with a maximum hardness loss of 19.93%. The number of cyclic compression passes had a greater effect on the hardness of the sample than the cyclic compression load. The elastic modulus exhibited a nonlinear variation upon increasing the cyclic loading or number of passes at a lower loading rate due to the coupling effect of loading rate and cyclic compression treatment. Then, the serration behavior and strain rate sensitivity analysis were applied. The calculated m-values obtained for MGs were all negative and gradually tended to zero upon further cyclic compression treatment. This demonstrated the weakening effect of cyclic compression on the strain rate sensitivity of MG, and the underlying mechanism was discussed. This study provides a process reference for studying the fatigue failure behaviors of MGs from the perspective of mechanical properties, which is useful for understanding their fatigue generation.

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“…The presence of such homogeneities promotes the plastic formability because they increase nucleation and branching . At the macroscale, the tribological mechanisms are complex and involve a combination of plasticity, transformation, and structural relaxations with structural changes. , There is no clear and unique correlation between the hardness/modulus and the tribological behavior of metallic glasses that has been established so far. Hence, the contributions of hardness, elastic modulus, and thermal treatment on wear resistance and nanoscale friction of thin MG compared to bulk and as-cast counterpart should be studied .…”

Section: Introductionmentioning

confidence: 99%

Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr₆₀Cu₂₅Al₅Ag₅Ni₅ Thin-Layer Metallic Glasses for Engineering Materials Applications

Muhabie,

Girma

2023

ACS Omega

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A new and unique alloy formulation design strategy has been developed in order to fabricate thin-layered metallic glasses (TLMGs) with superior fracture resistance and low coefficient of friction (COF) during the nanoscratching test. Due to the outstanding properties, TFMG could be applied for different uses, such as for surface coating, biomedical, bioimprinting, electronic devices, spacecraft, and railway, all of which need surface fracture resistance. The fabricated Zr-based metallic glass was prepared from Zr, Al, Cu, Ni, and Ag above 99.9 Wt % in purity by arch melting techniques. TFMGs were coated on silicon wafer by sputtering the vapor deposition method from bulk metallic glass then annealed below glass transition temperature T g ∼ 450 °C for 10, 30, and 60 min. Nanoindentation and nanoscratch tests were used to investigate nanomechanical and nanotribological properties, and atomic force microscopy (AFM) was used to examine the surface morphology and microstructures of TLMG. The nanoindentation data indicated that the average hardness of metallic glasses increased from 9.75 (as-cast MG) to 13.4 GPa (annealed for 60 min). Coefficients of friction for the cast sample, annealed for unannealed, 10, 30, and 60 min, were 0.062, 0.049, 0.039, and 0.03, respectively, as well as the wear depths were 201. 56, 148.43, 37.32, and 25.27 nm, respectively. These studies show that the coefficient of friction and wear rate decreases when the annealing time increases as a result of atomic reordering and structural relaxation that occurred at longer annealing times. Furthermore, continuous wear process, wear depth, wear track volume, and contact area decrease with increasing annealing time. This study can be used to design protocols to prepare novel TLMGs, which have outstanding mechanical and tribological properties for engineering materials applications.

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Unraveling the microstructural heterogeneity and plasticity of Zr50Cu40Al10 bulk metallic glass by nanoindentation

Cited by 42 publications

References 93 publications

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Effect of cyclic compression on the micromechanical properties of a Zr-based metallic glass

Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr₆₀Cu₂₅Al₅Ag₅Ni₅ Thin-Layer Metallic Glasses for Engineering Materials Applications

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Unraveling the microstructural heterogeneity and plasticity of Zr50Cu40Al10 bulk metallic glass by nanoindentation

Cited by 42 publications

References 93 publications

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Annealing-induced changes in wear resistance and nanomechanical properties of CuZr metallic glass thin films

Effect of cyclic compression on the micromechanical properties of a Zr-based metallic glass

Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr60Cu25Al5Ag5Ni5 Thin-Layer Metallic Glasses for Engineering Materials Applications

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Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr₆₀Cu₂₅Al₅Ag₅Ni₅ Thin-Layer Metallic Glasses for Engineering Materials Applications