Berkovich nanoindentation of Zr55Cu30Al10Ni5 bulk metallic glass at a constant loading rate

Liu, Ming; Hou, Dongyang; Gao, Chen

doi:10.1016/j.jnoncrysol.2021.120750

Cited by 25 publications

(6 citation statements)

References 117 publications

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“…5(a) shows that the power exponent m can be assumed to be a constant of 1.36, which lies in the normal range from 1.2 to 1.7 [39,64], and is almost the same as that (i.e., 1.37) of soda-lime glass [102]; and the permanent displacement hp is proportional to the maximum displacement hmax. The constant value of m that is independent of load, and the proportional relationship between hp and hmax have been widely reported in previous studies [37,58,64,103]. hp/hmax is about 0.62 for BST ceramic and smaller than 0.7, indicating that there exists no pile-up [104], which is rational for brittle ceramics.…”

Section: J U S T a C C E P T E Dsupporting

confidence: 52%

“…tensile properties [28], creep behavior [29], low-cycle fatigue [30,31], residual stress [32], and fracture toughness [33,34]) of various materials (e.g., metals [35], glasses [36], metallic glasses [37], ceramics [7,38], polymers [39][40][41], piezoelectric materials [42][43][44][45], thin films [46][47][48][49], and composites [50]). Microscratch test is also an effective technique to investigate scratch resistance of material [51], the structural integrity of multilayer coatings [52], tribological behavior [53,54], contact-induced damage/cracking [55], scratch-induced buckling failure of silicon nitride ceramic films [56], and the scratch behavior of Ce-doped YAG (Yttrium aluminum garnet, Y3Al5O12) coatings [57].…”

Section: Introductionmentioning

confidence: 99%

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Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Liu¹,

Xu²

2023

Journal of Advanced Ceramics

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Mechanical characterization of dielectric ceramics, which have drawn extensive attention in wireless communication, remains challenging. Micromechanical properties with microstructures of dielectric ceramic BaO-Sm2O3-5TiO2 (BST) were assessed by nanoindentation, microhardness, and microscratch tests under different indenters, along with X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. Accurate determination of elastic modulus (i.e., 260 GPa) and indentation hardness (i.e., J u s t A c c e p t e d 16.2 GPa) of brittle BST ceramic by instrumented indentation technique requires low loads with little indentation-induced damage. Elastic modulus and indentation hardness were analyzed by different methodologies such as energybased and displacement-based approaches, and elastic recovery of Knoop imprint. Consistent values (about 3.1 MPa·m 1/2 ) of fracture toughness of BST ceramic were obtained by different methods such as Vickers indenter-induced cracking method, energy-based nanoindentation approaches, and linear elastic fracture mechanics-based scratch approach with a spherical indenter, demonstrating successful applications of indentation and scratch methods in characterizing fracture properties of brittle solids. The deterioration of elastic modulus or indentation hardness with the increase in indentation load is caused by indentation-induced damage, and can be used to determine fracture toughness of material by energy-based nanoindentation approaches, and the critical void volume fraction is 0.27 (or 0.18) if elastic modulus (or indentation hardness) of the brittle BST ceramic is used. The fracture work at the critical load corresponding to the initial decrease in elastic modulus or indentation hardness can also be used to assess fracture toughness of brittle solids, opening new venues of application of nanoindentation test as a means to characterize fracture toughness of brittle ceramics.

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Section: J U S T a C C E P T E Dsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Liu¹,

Xu²

2023

Journal of Advanced Ceramics

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“…This result clearly indicates that the NC-type nanolaminate is susceptible to the pile-up formation, which is due to the strong interaction of indenter and substrate so that strain waves appear at the surface. 36,37 The Voronoi analysis was conducted to understand the structural variations and the local atomic rearrangements under the evolution of indenting process. 38 Using Voronoi tessellation, the local structure of glass was defined through the polyhedrons with the indices <n i3 , n i4 , n i5 , n i6 >, where the polyhedron i-edged faces are demonstrated by the "ni" parameter.…”

Section: Resultsmentioning

confidence: 99%

An investigation on plastic deformation and nanomechanical properties of Cu₆₀Zr₄₀/ Ni₈₀P₂₀ amorphous nanolaminates

Yang

Hong-wei

Salameh

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper aims to investigate the nanomechanical properties of amorphous nanolaminates by using the molecular dynamic (MD) simulation of nanoindentation process. To achieve this goal, two metallic glass (MG) nanolaminates with the arrangement of Cu60Zr40/Ni80P20 (CN type) and Ni80P20/Cu60Zr40 (NC type) were constructed. The MD outcomes unveiled that the NC-type sample exhibited a weaker strength at the loading stage and experienced a sharper relaxation at the end of holding stage. The strain maps of samples also revealed that the plastic deformation in the CN type initiated at the interface of substrate/indenter and was generated into the depth of material with a pear-like shape. On the other hand, the NC-type sample showed an accumulation of strain at the top layer normal to the direction of indenting process. This result indicated that the plasticity evolution occurred with a homogenous mode in the bulk of CN-type nanolaminate.

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“…With the aid of portable instrumented micro-indentation devices, instrumented indentation testing (IIT) has been widely used to evaluate the mechanical behavior of in-service engineering structures, such as high-speed rail [1,2], pipelines and turbine rotors [3]. In laboratories, IIT were also applied on metals [4,5], ceramics [6,7], coatings [8,9], shape memory alloys [10], etc, to determine mechanical parameters such as indentation hardness [11,12], elastic-plastic parameters [13][14][15], fracture parameters [16] and indentation activation volume [17]. Theoretically, to increase the accuracy in the determination of elastic modulus and indentation hardness, the surface of the sample to be tested should be mirror-flat.…”

Section: Introductionmentioning

confidence: 99%

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

Peng

Liu

et al. 2023

Mater. Res. Express

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Although, surface roughness can influence the determination of elastic moduli and indentation hardness to some extent by instrumented spherical indentation test, limited work has been done to quantitatively reveal and minimize these influences. In the present work, through a large number of finite element (FE) simulations and analyses, we clarified the evolution trend of determined elastic moduli and indentation hardness corresponding to different normalized indentation depths (h/R) and normalized roughness (Sq/R). On this basis, an area correction method was proposed to improve the measurement accuracy in the elastic moduli and indentation hardness. The FE results show that, with the newly proposed correction method, the maximum relative error in determined elastic moduli is reduced from about ±7% to ±2%, and that in the determined indentation hardness is reduced from about ±13% to ±5%, when Sq/R ≤ 2.2 × 10-3 and h/R = 5%. Applications were then illustrated on four typical metallic materials (i.e., AA 7075, AA 2014, steel 316L, and copper T2). The experimental results demonstrate that the proposed correction method is able to mitigate the effects of surface roughness on the determination of elastic moduli and indentation hardness to obtain more correct results.

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Berkovich nanoindentation of Zr55Cu30Al10Ni5 bulk metallic glass at a constant loading rate

Cited by 25 publications

References 117 publications

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

An investigation on plastic deformation and nanomechanical properties of Cu₆₀Zr₄₀/ Ni₈₀P₂₀ amorphous nanolaminates

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

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Berkovich nanoindentation of Zr55Cu30Al10Ni5 bulk metallic glass at a constant loading rate

Cited by 25 publications

References 117 publications

Micromechanical characterization of microwave dielectric ceramic BaO–Sm 2O 3–5TiO 2 by indentation and scratch methods

Micromechanical characterization of microwave dielectric ceramic BaO–Sm 2O 3–5TiO 2 by indentation and scratch methods

An investigation on plastic deformation and nanomechanical properties of Cu60Zr40/ Ni80P20 amorphous nanolaminates

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

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Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

An investigation on plastic deformation and nanomechanical properties of Cu₆₀Zr₄₀/ Ni₈₀P₂₀ amorphous nanolaminates