Investigation into nanoscratching mechanical performance of metallic glass multilayers with improved nano-tribological properties

Zhou, Qin; Du, Yin; Ren, Yin; Kuang, Wangwang; Han, Weichao; Wang, Haifeng; Huang, Ping; Wang, Fei; Wang, Jian

doi:10.1016/j.jallcom.2018.10.270

Cited by 63 publications

(15 citation statements)

References 70 publications

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“…the initial unstable region where the COF is rapidly increased because the tip is trying to settle down and the subsequent steady-state region where the COF is nearly constant. This is exactly similar to the results reported in other tribology studies [61,62]. In terms of the steady-state region, the COF profile varies in its height with the annealing temperature.…”

Section: Nano-tribological Propertiessupporting

confidence: 91%

Enhanced micro/nano-tribological performance in partially crystallized 60NiTi film

Zeng

2020

Friction

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The microstructure, mechanical and micro/nano-tribological properties of the 60NiTi film annealed at different temperature were investigated. The results reveal that annealing as-deposited 60NiTi film at 300, 375, and 600 °C for 1 h leads to structural relaxation, partial crystallization and full crystallization, respectively. Compared with the structurally relaxed structure, the partially crystallized structure exhibits increased hardness but decreased elastic modulus. This is because that the elastic modulus is reduced by Voigt model while the hardness is improved by composite effect. Due to the highest hardness and ratio of hardness to elastic modulus (H/E), the partially crystallized 60NiTi film has the lowest penetration depth and residual depth (i.e., groove depth). Besides, the results also reveal that ductile plowing is the dominant wear mechanism for all the annealed 60NiTi films. Under the condition of the ductile plowing, coefficient of friction and wear resistance are related to penetration depth and residual depth, respectively. Therefore, the partially crystallized 60NiTi film shows the best tribological performance at the micro/nano-scale. The current work not only highlights the important roles of hardness and H/E in improving the micro/nano-tribological properties but also concludes an efficient and simple method for simultaneously increasing hardness and H/E.

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Section: Nano-tribological Propertiessupporting

confidence: 91%

Enhanced micro/nano-tribological performance in partially crystallized 60NiTi film

Zeng

2020

Friction

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“…The glassy phase under the indenter is subjected to the plastic and elastic deformation not only in the indentation process but also in the scratching process [ 33 ]. The elastic deformation under the indenter leads to the decrease in the residual scratch depth, i.e., d R .…”

Section: Discussionmentioning

confidence: 99%

“…The elastic deformation under the indenter leads to the decrease in the residual scratch depth, i.e., d R . [ 33 ]. Figure 5 a shows the penetration depth during the nano-scratching process, d P , and the residual depth after the nano-scratching process, d R , as functions of various MGTFs.…”

Section: Discussionmentioning

confidence: 99%

Enhanced Mechanical Properties of Metallic Glass Thin Films via Modification of Structural Heterogeneity

Sun

et al. 2021

Materials

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The structure of Cu50Zr50 and Co56Ta35B9 metallic glass thin films (MGTF) was effectively tailored via various applied substrate temperatures by means of the magnetron sputtering technology. Obviously enhanced hardness and elastic modulus are achieved by different compositional MGTFs by increasing the substrate temperature. Compared with the CuZr MGTFs, the CoTaB MGTF deposited at 473 K displays the smaller strain-rate sensitivity exponent, m, and a weaker spectrum intensity based on the nanoindentation creep test, suggesting its better creep resistance. In addition, the STZ volume of the CoTaB MGTF significantly decreases after depositing at higher temperature. According to the nano-scratch analysis, the CoTaB MGTF at the substrate temperatures of 473 K performs the shallower scratch width and the larger H3/E2 value, indicating its better tribological property.

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“…Statistical and dynamic analysis of shear avalanches in MGs has been suggested as an important feature characterizing the plastic deformation mechanisms [10][11][12][13][14]. Two distinct dynamical regimes have been identified.…”

Section: Introductionmentioning

confidence: 99%

“…Bian et al [13] adopted a statistical method for the normalized intermittent and abrupt events known as the strain burst size (S). Admittedly, the cut-off value of S (S c ), corresponding to the critical size of self-organized shear avalanches, was used to predict distributions and dynamics of shear avalanches [14]. It was reported that the alloy compositions can dramatically change the value of S c that demonstrates intrinsic ductility or brittleness of MGs [13,15].…”

Section: Introductionmentioning

confidence: 99%

Imparities of shear avalanches dynamic evolution in a metallic glass

Zhou

Jia

et al. 2020

Materials Research Letters

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The imparities of shear avalanches dynamic evolution under nanoindentation originating from the soft regions and the stiff matrix were explored in a metallic glass by statistical and dynamic analysis. Upon the continuous indentation process, the dynamic state of the stiff matrix exhibits a transition from a chaotic behavior to a self-organized critical (SOC) behavior, whereas the soft regions are dominated by the SOC behavior throughout the indentation process. The mechanism was clarified by the evolution of the cut-off size of shear avalanches. These findings might advance our fundamental understanding of inhomogeneous deformation on microscale. IMPACT STATEMENTThe shear avalanches dynamic evolution controlled by the atomic-scale rearrangement mechanism in metallic glasses strongly relies on the structural state and the history of deformation.

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Investigation into nanoscratching mechanical performance of metallic glass multilayers with improved nano-tribological properties

Cited by 63 publications

References 70 publications

Enhanced micro/nano-tribological performance in partially crystallized 60NiTi film

Enhanced micro/nano-tribological performance in partially crystallized 60NiTi film

Enhanced Mechanical Properties of Metallic Glass Thin Films via Modification of Structural Heterogeneity

Imparities of shear avalanches dynamic evolution in a metallic glass

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