scholarly journals Extended Applications of the Depth-Sensing Indentation Method

Micromachines ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1023
Author(s):  
Dániel Olasz ◽  
János Lendvai ◽  
Attila Szállás ◽  
Gábor Gulyás ◽  
Nguyen Q. Chinh
Keyword(s):  
Phase Transition ◽  
Elastic Modulus ◽  
Rate Sensitivity ◽  
Deformation Mechanisms ◽  
Depth Sensing ◽  
Indentation Method ◽  
Loading Rates ◽  
Depth Data ◽  
Transition Strain

The depth-sensing indentation method has been applied for almost 30 years. In this review, a survey of several extended applications developed during the last three decades is provided. In depth-sensing indentation measurements, the load and penetration depth data are detected as a function of time, in most cases at controlled loading rates. Therefore, beside the determination of hardness and Young’s modulus, different deformation mechanisms and many other dynamic characteristics and phenomena, such as the dynamic elastic modulus, load-induced phase transition, strain rate sensitivity, etc. can be studied. These extended applications of depth-sensing indentation measurements are briefly described and reviewed.

Evaluating Mechanical Properties of Cement Materials by Depth-Sensing Indentation Method

2010 ◽  
Vol 44-47 ◽  
pp. 2587-2591
Author(s):  
Xiu Fang Wang ◽  
Yi Wang Bao ◽  
Kun Ming Li ◽  
Yan Qiu ◽  
Xiao Gen Liu
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Energy Dissipation ◽  
Engineering Application ◽  
Calculated Data ◽  
Absorption Capacity ◽  
Cement Industry ◽  
Depth Sensing ◽  
Indentation Method ◽  
Recovery Resistance

The energy consumption of crushing is directly affected by the mechanical properties of cement materials. The elastic modulus, energy dissipation, recovery resistance and other mechanical properties of cement materials are evaluated based on the depth-sensing indentation method in this work. It is significant and efficient for engineering application. In results, the calculated elastic modulus is close to that measured by dynamic method, being used to verify the correctness of the calculated data. And the calculated energy dissipation of clinker is higher than that of limestone and granite, which can partially be used to explain why the grinding of clinker consumes a lot of energy in cement industry. The recovery resistance of clinker is almost identical to that of granite, more than that of limestone. It is found that the clinker, in contrast to granite and limestone, exhibits better plasticity and greater energy absorption capacity.

On the determination of elastic modulus in very stiff materials by depth sensing indentation

2009 ◽  
Vol 44 (21) ◽  
pp. 5795-5799 ◽  
Author(s):  
A. Rico ◽  
M. A. Garrido Maneiro ◽  
M. T. Gómez Del Rio ◽  
A. Salazar ◽  
J. Rodríguez
Keyword(s):  
Elastic Modulus ◽  
Depth Sensing

Errors associated with depth-sensing microindentation tests

1995 ◽  
Vol 10 (6) ◽  
pp. 1491-1501 ◽  
Author(s):  
J. Menčík ◽  
M.V. Swain
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Thermal Drift ◽  
Measuring Instrument ◽  
Material Characteristic ◽  
Depth Sensing ◽  
Characteristic Features ◽  
Indenter Geometry

In the determination of mechanical properties by ultra-microindentation, various errors can appear. This paper analyzes various sources of errors in estimation of elastic modulus and hardness. These errors arise from uncertainties of the indenter geometry and properties, as well as measuring instrument limitations and errors, such as the minimum detectable load, compliance, and noise of the system. Other sources of errors are thermal drift, shape of the impression, and scatter of properties of the tested material. Characteristic features and the magnitude of individual kinds of errors are discussed, together with formulas and recommended methods for their reduction.

Contact Problems at Nano/Microscale and Depth Sensing Indentation Techniques

2010 ◽  
Vol 662 ◽  
pp. 53-76 ◽  
Author(s):  
Feodor M. Borodich
Keyword(s):  
Elastic Modulus ◽  
Direct Method ◽  
Contact Problems ◽  
Work Of Adhesion ◽  
Depth Sensing ◽  
Plastic Properties ◽  
Type Contact ◽  
Indentation Tests ◽  
Properties Of Materials

An overview of development of indentation techniques and connections between contact mechanics and methods of extracting mechanical characteristics from indentation data is given. Observed disagreements between the experimental observations and the models of indentation are discussed. It is shown that this disagreement is often caused by violation of hypotheses that are used in the formulation of the appropriate boundary-value contact problems and strictly speaking one cannot apply directly the solutions of Hertz type contact problems to indentation tests employing the sharp indenters. It is shown that commonly used experimental test involving sharp pyramidal and conical indenters may be applied to study plastic properties of materials while this approach is not very accurate for estimations of elastic modulus of the test solid. The recently proposed by Borodich and Galanov non-direct method that employs data of elastically loading of a spherical indenter is described. It is argued that the non-direct method can be used for determination of both the work of adhesion and elastic modulus of the tested material.

Depth-sensing indentation modeling for determination of Elastic modulus of thin films

2010 ◽  
Vol 42 (2) ◽  
pp. 166-174 ◽  
Author(s):  
A. Tricoteaux ◽  
G. Duarte ◽  
D. Chicot ◽  
E. Le Bourhis ◽  
E. Bemporad ◽  
...  
Keyword(s):  
Thin Films ◽  
Elastic Modulus ◽  
Depth Sensing

scholarly journals Структурно-временные особенности динамического деформирования наноструктурированных и наноразмерных металлов

2018 ◽  
Vol 60 (9) ◽  
pp. 1767
Author(s):  
Н.С. Селютина ◽  
И.Н. Бородин ◽  
Ю.В. Петров
Keyword(s):  
Dynamic Deformation ◽  
Relaxation Times ◽  
Rate Sensitivity ◽  
Characteristic Relaxation Time ◽  
Dynamic Effects ◽  
Integral Criterion ◽  
Dominant Mechanism ◽  
Loading Rates ◽  
Wide Range

AbstractThe evolution of a structural–temporal integral criterion of yielding is reported for the description of the dynamic deformation of metals. The values of characteristic relaxation times, considered as the constants of the material, are shown to be suitable for the description of dynamic effects upon the nanomaterial deformation in a wide range of loading rates. Three various ways of the determination of characteristic relaxation time of nanomaterials are discussed. The behavior of the ultimate stress in the range of pulse duration from one and two points of change in the dominant mechanism of rate sensitivity is interpreted in the context of integral criterion of yielding.

A method for interpreting the data from depth-sensing indentation instruments

1986 ◽  
Vol 1 (4) ◽  
pp. 601-609 ◽  
Author(s):  
M.F. Doerner ◽  
W.D. Nix
Keyword(s):  
Thin Films ◽  
Elastic Modulus ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Depth Sensing ◽  
Plastic Properties ◽  
Total Displacement ◽  
Exact Shape ◽  
Hardness Values

Depth-sensing indentation instruments provide a means for studying the elastic and plastic properties of thin films. A method for obtaining hardness and Young's modulus from the data obtained from these types of instruments is described. Elastic displacements are determined from the data obtained during unloading of the indentation. Young's modulus can be calculated from these measurements. In addition, the elastic contribution to the total displacement can be removed in order to calculate hardness. Determination of the exact shape of the indenter at the tip is critical to the measurement of both hardness and elastic modulus for indentation depths less than a micron. Hardness is shown to depend on strain rate, especially when the hardness values are calculated from the data along the loading curves.

Determination of Real Material Properties From Nanoindentation Experiments

2003 ◽  
Author(s):  
L. Kogut ◽  
K. Komvopoulos
Keyword(s):  
Elastic Modulus ◽  
Material Properties ◽  
Numerical Solutions ◽  
Material Behavior ◽  
Depth Sensing ◽  
Empirical Relations ◽  
Real Material ◽  
Alternative Approach ◽  
Material Hardness

In recent years, due to extensive development of depth-sensing indentation techniques, nanoindentation has been used to evaluate the mechanical properties of surface layers and thin films of different materials. However, current nanoindentation procedures are based on simplified assumptions about the material behavior during unloading and empirical relations of the contact area (e.g., Oliver and Pharr, 1992) with little input from analytical and numerical solutions. Therefore, it is unclear what properties can be measured using instrumented nanoindentation techniques and what is the validity of the present procedures for measuring reduced elastic modulus and material hardness. Thus, the main objective of the present study was to analyze the validity of the current approaches for determining material properties and to propose an alternative approach for measuring the reduced elastic modulus, yield strength, and material hardness.

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