Scratch induced deformation behavior of hafnium based bulk metallic glass at multiple load scales

Lahiri, Debrupa; Karp, Jeffrey M.; Keshri, Anup Kumar; Zhang, Cheng; Dulikravich, George S.; Kecskes, Laszlo J.; Agarwal, Arvind

doi:10.1016/j.jnoncrysol.2014.12.010

Cited by 21 publications

(2 citation statements)

References 30 publications

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“…Some researchers have proposed that the inhomogeneous plasticity of MGs, mainly caused by the localized shear bands, plays a crucial role in the wear properties [37,38]. For instance, Lahiri et al [39] did some tribological experimentations and reported that the propagation of shear bands in the wear track leads to creation of some serrations or fluctuations in the lateral force. These serrations are indicative of inhomogeneous plastic deformation and appearance of shear bands on the MG surfaces, which is also seen in our work (See figure 5(d)).…”

Section: Resultsmentioning

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: Resultsmentioning

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

“…Bulk metallic glasses (BMGs) are well known for their unique properties such as low Young's modulus, large elastic deformation capacity, corrosion resistance and superplasticity in supercooled liquid region [1][2][3][4]. Among many amorphous alloy systems, Zr-based systems are well-known due to their good glass-forming ability, low critical cooling rate and wide supercooled liquid region.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Micro-Dent Produced by Laser Shock Peening on Zr-Based Bulk Metallic Glass

Zhu

Zheng

et al. 2016

MSF

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A Zr41.2Ti13.8Cu12.5Ni10Be22.5 (vit1) bulk metallic glass was processed by Nd: Glass laser pulses with duration 30ns and energy in the range 20 to 30J. The surface morphology and surface micro-hardness of the vit1 metallic glass, treated with varying laser energy, had been studied in detail. Laser shock peening induced plastic deformation and caused a micro-dent to be generated on the vit1 surface. The optical profiling tests showed that laser pulse energy greatly influenced the diameter and depth of the micro-dents. The surface roughness which was caused by various laser pulse energy was assessed and characterized. The three-dimensional surface topography of the laser treated region on vit1 surfaces had been characterized. In addition the plastic deformation features were also studied.

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In-Situ Mechanics: Introduction and Importance

Nautiyal

Boesl

Agarwal

2020

In-Situ Mechanics of Materials

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Scratch induced deformation behavior of hafnium based bulk metallic glass at multiple load scales

Cited by 21 publications

References 30 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

Fabrication and Characterization of Micro-Dent Produced by Laser Shock Peening on Zr-Based Bulk Metallic Glass

In-Situ Mechanics: Introduction and Importance

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