Micro- and Macromechanical Properties of Materials

Zhou, Yichun; Yang, Li; Huang, Yongli

doi:10.1201/b15525

Cited by 19 publications

(13 citation statements)

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“…The strength characteristics include hardness, tensile strength, elastic modulus (Young's modulus), proportional limit, and yield strength. There is a close correlation between the modulus and strength of the ceramic materials, which is confirmed by numerous works [4][5][6]. It is known that the tensile strength of the materials at temperatures less than 0,5 T m (melting) is combined with hardness by the empirical relationship H/σ t ≈ 3.…”

Section: Introductionsupporting

confidence: 58%

Opto-acoustic and Acoustic Microscopy Studies of Microstructure, Elasticity and Defects in B₄C/C₆₀ and c-BN/C₆₀ Nanocomposites

Ovsyannikov¹,

Prokhorov²,

Morokov³

et al. 2019

J. Sib. Fed. Univ., Math. phys.

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Carbon-ceramic nanocomposites based on boron carbide with fullerene C60 (B4C/C60) and cubic boron nitride with C60 (c-BN/C60) were prepared by a high-energy ball milled pre-treatment of the initial mixture of components with the addition of a CS2 solvent followed by a high-pressure/high-temperature consolidation. Elastic properties of the composites were characterized by the elastic moduli calculated on the bases of the experimentally measured density and values of velocities of the longitudinal and transverse bulk acoustic waves (BAW) in the samples. The BAW velocities were measured with a pulse-echo method by laser optoacoustic excitation of ultrasonic pulses. Acoustic microscopy was used to visualize the bulk microstructure and internal defects, and to measure the local values of BAW velocities of specimens on which the elastic moduli were calculated.

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Section: Introductionsupporting

confidence: 58%

Opto-acoustic and Acoustic Microscopy Studies of Microstructure, Elasticity and Defects in B₄C/C₆₀ and c-BN/C₆₀ Nanocomposites

Ovsyannikov¹,

Prokhorov²,

Morokov³

et al. 2019

J. Sib. Fed. Univ., Math. phys.

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“…Generally speaking, the strength of a material can be approximately estimated as E/10, where E is Young's modulus. 16 To assess the validity of first-principles calculations, the values of E/10 for Li-Sn alloys are also given in Fig. 3, where the values of E are taken from Ref.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of Li–Sn alloys for Li-ion battery anodes: A first-principles perspective

Zhang

Jiang

et al. 2016

AIP Advances

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Fracture and pulverization induced by large stress during charging and discharging may lead to the loss of electrical contact and capacity fading in Sn anode materials. A good understanding of mechanical properties is necessary for their optimal design under different lithiation states. On the basis of first-principles calculations, we investigate the stress-strain relationships of Li–Sn alloys under tension. The results show that the ideal tensile strengths of Li–Sn alloys vary as a function of Li concentration, and with the increase of Li+ concentration, the lowest tensile strength decreases from 4.51 GPa (Sn) to 1.27 GPa (Li7Sn2). This implies that lithiation weakens the fracture resistance of Li–Sn alloys.

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“…The micro flexible rolling process involves the elastic-plastic behaviour of the rolled material, whose strain state is dependent not only on the stress state but also on the entire stress history after entering to the plastic realm [64,65]. The analysis of such a nonlinear elastic-plastic problem can proceed in an incremental manner.…”

Section: Numerical Simulation Of Micro Flexible Rolling 431 Incremementioning

confidence: 99%

Study of micro flexible rolling based on grained inhomogeneity

Jiang

Wei

et al. 2017

International Journal of Mechanical Sciences

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This paper shows an analytical, numerical and experimental investigation to comprehend the role of grained inhomogeneity which plays in micro flexible rolling in terms of the average rolling force and the thickness directional springback of the workpiece after it exits the roll bite zone. Miniature tensile tests and micro hardness tests are accomplished to identify the scattered stress-strain curves for 500 ¿m thick aluminium alloy 1060 samples with grain size of approximately 23-71 µm and to determine the weighted heterogeneity coefficient for each sample separately, according to which the theoretical calculations and numerical simulations based upon 3D Voronoi tessellation technique have been performed under actual experimental conditions where reductions of 25 to 50 % are selected. The scattering effect associated with the anisotropic nature of single grains has been perceived in the micro flexible rolling process and both the analytical and finite element models developed have been validated via experimental data to hold promise for predicting the rolling force and the thickness directional springback of the workpiece, as well as boosting the thickness profile control performance of the micro flexible rolling mill.

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Micro- and Macromechanical Properties of Materials

Cited by 19 publications

References 0 publications

Opto-acoustic and Acoustic Microscopy Studies of Microstructure, Elasticity and Defects in B₄C/C₆₀ and c-BN/C₆₀ Nanocomposites

Opto-acoustic and Acoustic Microscopy Studies of Microstructure, Elasticity and Defects in B₄C/C₆₀ and c-BN/C₆₀ Nanocomposites

Mechanical properties of Li–Sn alloys for Li-ion battery anodes: A first-principles perspective

Study of micro flexible rolling based on grained inhomogeneity

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