Comparing AM200® with Titanium-Based Coatings Elastic–Plastic Properties by Nanoindentation, Modified Dimensional Analysis and Minimum Resultant Error Method

Obtaining the plastic properties of thin film coatings has been the main challenge for decades. Implementing the hybrid methods seems to be an applicable way to address this issue. Unfortunately, limitations of nonunique answers together with the need for enormous amount of calculations are counted as the main challenges. To overcome such difficulties, a modified dimensional analysis method is proposed, which is able to reduce the number of dimensionless parameters. Another novel algorithm named “minimum resultant error method” is developed to provide proper criteria to investigate the compliance of the analytical results with empirical data. With this algorithm, yield stress, strain hardening exponent, and strain hardening coefficient are extracted as unique values by using a single indenter nanoindentation results. The simulation results are processed with combined modified dimensional analysis method and minimum resultant error method algorithms. The effects of interlayer, friction coefficient, and indenter tip radius are investigated. Error analysis to the modulus of elasticity is undertaken and the results show less than 2% error for the infimum point, while the individual dimensionless functions errors are below 3.4%. According to the results, this new approach is well-coped with the earlier studies.

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Assessment of Elastic–Plastic and Electrical Properties of Printed Silver-Based Interconnects for Flexible Electronics

Journal of Electronic Packaging ◽

10.1115/1.4041014 ◽

2018 ◽

Vol 140 (4) ◽

Author(s):

Hsien-Chie Cheng ◽

Ruei-You Hong ◽

Wen-Hwa Chen

Keyword(s):

Electrical Properties ◽

Dimensional Analysis ◽

Flexible Electronics ◽

Plastic Material ◽

Electrical Performance ◽

Plastic Properties ◽

Solvent Content ◽

Representative Strain ◽

Elastic Plastic ◽

Wide Range

In this work, the elastic–plastic properties of the printed interconnects on a glass substrate with Ag-filled polymer-conductor ink are evaluated through a theoretical framework based on finite element (FE) modeling of instrumented sharp indentation, experimental indentation, the concept of the representative strain, and dimensional analysis. Besides, the influences of the ink-solvent content and temperature on the elastic–plastic and electrical properties of the printed Ag-based interconnects are also addressed. First of all, parametric FE indentation analyses are carried out over a wide range of elastic–plastic material parameters. These parametric results together with the concept of the representative strain are used via dimensional analysis to constitute a number of dimensionless functions, and further the forward/reverse algorithms. The forward algorithm is used for describing the indentation load–depth relationship and the reverse for predicting the elastic–plastic parameters of the printed Ag-based interconnects. The proposed algorithms are validated through the correct predictions of the plastic properties of three known metals. At last, their surface morphology, microstructure, and elemental composition are experimentally characterized. Results show that the elastic–plastic properties and electrical sheet resistance of the printed Ag-based interconnects increase with the ink-solvent content, mainly due to the increase of carbon element as a result of the increased ink-solvent residue, whereas their elastic–plastic properties and electrical performance decreases with the temperature.

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A combined dimensional analysis and optimization approach for determining elastic–plastic properties from indentation tests

The Journal of Strain Analysis for Engineering Design ◽

10.1177/0309324711421723 ◽

2011 ◽

Vol 46 (8) ◽

pp. 749-759 ◽

Cited By ~ 10

Author(s):

J J Kang ◽

A A Becker ◽

W Sun

Keyword(s):

Mechanical Properties ◽

Dimensional Analysis ◽

Optimization Procedure ◽

Fe Analysis ◽

Optimization Approach ◽

Fe Method ◽

Plastic Properties ◽

Elastic Plastic ◽

Indentation Tests ◽

Extensive Computation

Loading–unloading curves obtained from indentation experiments can be used to extract elastic-plastic mechanical properties using the finite element (FE) method. However, extensive computation times are required in such an approach due to the fact that the optimization procedure is based on iterative FE computations. In this study, a combined dimensional analysis and optimization approach is developed for the determination of the elastic-plastic mechanical properties of power law materials, without the need for iterative FE analysis. A parametric study using FE analysis is first conducted to construct the appropriate dimensional functions. The optimization algorithm with either a single indenter or dual indenters is then used to obtain the material properties from the given loading–unloading curves. Different sets of materials properties are used and the accuracy and validity of the predicted mechanical properties using the single indenter or dual indenters are assessed.

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Nanoscale characterization of Titanium-based coatings plastic properties by dimensional analysis, FEA and Infimum resultant error criterion

Journal of the Brazilian Society of Mechanical Sciences and Engineering ◽

10.1007/s40430-020-02546-5 ◽

2020 ◽

Vol 42 (9) ◽

Author(s):

E. Bazzaz ◽

A. Darvizeh ◽

M. Alitavoli ◽

M. Yarmohammad Tooski

Keyword(s):

Dimensional Analysis ◽

Error Criterion ◽

Plastic Properties ◽

Resultant Error ◽

Nanoscale Characterization

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Finite Pure Plane Strain Bending of Inhomogeneous Anisotropic Sheets

Symmetry ◽

10.3390/sym13010145 ◽

2021 ◽

Vol 13 (1) ◽

pp. 145

Author(s):

Sergei Alexandrov ◽

Elena Lyamina ◽

Yeong-Maw Hwang

Keyword(s):

Plane Strain ◽

Yield Criterion ◽

Large Strains ◽

Rigid Plastic ◽

Plastic Properties ◽

Elastic Plastic ◽

Starting Point ◽

The Difference ◽

Inside Radius ◽

Elastic Unloading

The present paper concerns the general solution for finite plane strain pure bending of incompressible, orthotropic sheets. In contrast to available solutions, the new solution is valid for inhomogeneous distributions of plastic properties. The solution is semi-analytic. A numerical treatment is only necessary for solving transcendent equations and evaluating ordinary integrals. The solution’s starting point is a transformation between Eulerian and Lagrangian coordinates that is valid for a wide class of constitutive equations. The symmetric distribution relative to the center line of the sheet is separately treated where it is advantageous. It is shown that this type of symmetry simplifies the solution. Hill’s quadratic yield criterion is adopted. Both elastic/plastic and rigid/plastic solutions are derived. Elastic unloading is also considered, and it is shown that reverse plastic yielding occurs at a relatively large inside radius. An illustrative example uses real experimental data. The distribution of plastic properties is symmetric in this example. It is shown that the difference between the elastic/plastic and rigid/plastic solutions is negligible, except at the very beginning of the process. However, the rigid/plastic solution is much simpler and, therefore, can be recommended for practical use at large strains, including calculating the residual stresses.

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Cumulation of a spherically converging shock wave in metals and its dependence on elastic-plastic properties, phase transitions, spall and shear fractures

Journal of Physics Conference Series ◽

10.1088/1742-6596/490/1/012191 ◽

2014 ◽

Vol 490 ◽

pp. 012191 ◽

Cited By ~ 3

Author(s):

E A Kozlov ◽

A V Petrovtsev

Keyword(s):

Shock Wave ◽

Phase Transitions ◽

Plastic Properties ◽

Elastic Plastic ◽

Converging Shock Wave

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Determining Elastic-Plastic Properties of Al6061-T6 from Micro-Indentation Technique

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.592-593.610 ◽

2013 ◽

Vol 592-593 ◽

pp. 610-613

Author(s):

Sina Amiri ◽

Nora Lecis ◽

Andrea Manes ◽

Davide Mombelli ◽

Marco Giglio

Keyword(s):

Manufacturing Process ◽

Optimization Procedure ◽

Test System ◽

Standard Test ◽

Material Behavior ◽

Plastic Properties ◽

Representative Strain ◽

Elastic Plastic ◽

Dimensionless Analysis ◽

Micro Indentation

Different approaches have been proposed in order to determine the material behavior of ductile materials. Since, the mechanical properties of a mechanical component are modified during manufacturing process due to plastic deformation, heat treatment and etc, a non-destructive indentation experimental procedure addressed to predict the elastic-plastic properties of material after manufacturing process is of interest. This is especially true for small size components where it is complex to extract specimens to test on standard test system. Based on dimensionless analysis and the concept of a representative strain, different approaches have been proposed to determine the material properties of power law materials by using indentation process. In this work, the Johnson-Cook (JC) constitutive model of the aluminum alloy Al6061-T6 is characterized by means of a well-defined optimization procedure based on micro-indentation testing and high fidelity finite element models and an optimization procedure but without the concept of dimensionless analysis and a representative strain. This methodology allows determining a set of JC constants for Al6061-T6. The obtained results have good agreement with parameters calibrated by means of universal standard tests and reverse engineering approach.

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Evaluation of elastic, elastic-plastic properties of thin Pt wire by mechanical bending test

Applied Physics A ◽

10.1007/s00339-010-6020-6 ◽

2010 ◽

Vol 103 (2) ◽

pp. 493-496 ◽

Cited By ~ 4

Author(s):

S. K. Deb Nath ◽

Hironori Tohmyoh ◽

M. A. Salam Akanda

Keyword(s):

Bending Test ◽

Plastic Properties ◽

Elastic Plastic ◽

Mechanical Bending

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The influence of the Sc3+ dopant on the transmittance of (Y, Er)3Al5O12 ceramics

Dalton Transactions ◽

10.1039/d1dt02419a ◽

2021 ◽

Author(s):

Elena Dobretsova ◽

Vadim Zhmykhov ◽

Sergey Kuznetsov ◽

Irina Chikulina ◽

Marina Nikova ◽

...

Keyword(s):

Optical Transmittance ◽

Plastic Properties ◽

Elastic Plastic

The substitution of Al3+ with the larger Sc3+ in the Er:YSAG structure leads to improved elastic–plastic properties. The optical transmittance of the ceramics is affected strongly by including Sc3+ and is increased to up to 60% at about 1.5 μm.

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