A review of nanoindentation continuous stiffness measurement technique and its applications

Li, Xiaodong; Bhushan, Bharat

doi:10.1016/s1044-5803(02)00192-4

Cited by 1,356 publications

(703 citation statements)

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“…Nanoindentation [1], which is relatively simple and effective, has already been used as a standard technique for evaluating mechanical properties of thin films [2][3][4][5][6][7]. Recently, a number of relevant scientists have focused on thin films with defects through simulations and experiment [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Multiscale Simulation of Surface Defects Influence Nanoindentation by a Quasi-Continuum Method

Zhang

et al. 2018

Crystals

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Microscopic properties of nanocrystal aluminum thin film have been investigated using the quasicontinuum method in order to study the influence of surface defects in nanoindentation. Various distances between the surface defect and indenter have been taken into account. The results show that as the distance between the pit and indenter increases, the nanohardness increases in a wave pattern associated with a cycle of three atoms, which is closely related to the crystal structure of periodic atoms arrangement on {1 1 1} atomic close-packed planes of face-centered cubic metal; when the adjacent distance between the pit and indenter is more than 16 atomic spacing, there is almost no effect on nanohardness. In addition, the theoretical formula for the necessary load for elastic-to-plastic transition of Al film has been modified with the initial surface defect size, which may contribute to the investigation of material property with surface defects.

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Section: Introductionmentioning

confidence: 99%

Multiscale Simulation of Surface Defects Influence Nanoindentation by a Quasi-Continuum Method

Zhang

et al. 2018

Crystals

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“…A Berkovich diamond indenter was selected [131]. In the CSM module, continuous loading and unloading cycles were conducted during the loading branch by imposing a small dynamic oscillation of 2 nm and 45 Hz on the displacement signal and measuring the amplitude and phase of the corresponding force [97]. Consequently, the contact stiffness can be measured continuously during the penetration depth.…”

Section: Methodsmentioning

confidence: 99%

“…Depth sensing indentations tests (DSI) were carried out with a Nanoindenter XP (MTS systems Co.), on the polished surfaces of the samples, by using the continuous stiffness measurement methodology (CSM) [97]. Continuous loading and unloading cycles were conducted during the loading branch by imposing a small dynamic oscillation of 2 nm and 45…”

Section: Methodsmentioning

confidence: 99%

“…Many factors could influence the extraction of material properties, for instance, the roughness of the specimen, the friction ratio between the indenter and the indented material, tip rounding, the pile up and sink in [96][97][98][99]. In this section, the contamination which could be encountered in the experimental data process will be discussed and summarized.…”

Section: Contamination In the Experimental Data Processmentioning

confidence: 99%

“…The CSM with 45 Hz oscillation frequency and 2 nm amplitude would normally produce reasonable values of contact stiffness [97]. The inherent noise should also be considered, which would scatter the post data analysis.…”

Section: Pile-up or Sink-in Phenomenonmentioning

confidence: 99%

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Determining the elastic-plastic properties of metallic materials through instrumented indentation

Chang¹

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AgradecimientosPrimero, me gustaria agradecer a mis supervisores. Me gustaría expresar mi máximo aprecio hacia mi supervisor Dr. J. Ruiz-Hervias por guiarme y ayudarme durante estos años en el laboratorio. He aprendido de él, no solo en lo estrictamente académico, si no en su generosidad y en su mente positiva hacia la vida. Además, también quería agradecer a mi co-supervisor Dr. M. A. Garrido. Él ha jugado un papel muy significante en el inicio de mi vida académica. Sus ideas y su entusiasmo siempre me inspiraron y me motivaron. Sin su paciencia y su ayuda, nunca hubiera acabado esta tesis. ResumenEn los últimos años, y asociado al desarrollo de la tecnología MEMS, la técnica de indentación instrumentada se ha convertido en un método de ensayo no destructivo ampliamente utilizado para hallar las características elástico-plásticas de recubrimientos y capas delgadas, desde la escala macroscópica a la microscópica. Sin embargo, debido al complejo mecanismo de contacto debajo de la indentación, es urgente proponer un método más simple y conveniente para obtener unos resultados comparables con otras mediciones tradicionales. En este estudio, el objetivo es mejorar el procedimiento analítico para extraer las propiedades elástico-plásticas del material mediante la técnica de indentación instrumentada.La primera parte se centra en la metodología llevada a cabo para medir las propiedades elásticas de los materiales elásticos, presentándose una nueva metodología de indentación, basada en la evolución de la rigidez de contacto y en la curva fuerza-desplazamiento del ensayo de indentación. El método propuesto permite discriminar los valores de indentación experimental que pudieran estar afectados por el redondeo de la punta del indentador. Además, esta técnica parece ser robusta y permite obtener valores fiables del modulo elástico.La segunda parte se centra en el proceso analítico para determinar la curva tensión-deformación a partir del ensayo de indentación, empleando un indentador esférico. Para poder asemejar la curva tension-deformación de indentación con la que se obtendría de un ensayo de tracción, Tabor determinó empíricamente un factor de constricción de la tensión () y un factor de constricción de la deformación (). Sin embargo, la elección del valor de  y  necesitan una derivación analítica. Se describió analíticamente una nueva visión de la relación entre los factores de constricción de tensión y la deformación basado en la deducción de la viii ecuación de Tabor. Un modelo de elementos finitos y un diseño experimental se realizan para evaluar estos factores de constricción. A partir de los resultados obtenidos, las curvas tension-deformación extraidas de los ensayos de indentación esférica, afectadas por los correspondientes factores de constricción de tension y deformación, se ajustaron a la curva nominal tensión-deformación obtenida de ensayos de tracción convencionales.En la última parte, se estudian las propiedades del revestimiento de cermet Inconel 625-Cr 3 C 2 que es depositado en el medio de una a...

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Hardness

Calleja

Flores

2011

Encyclopedia of Polymer Science and Technology

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A description of the hardness technique and its application to polymer systems is presented. The method is based on the local deformation produced on a material surface by an indenter upon application of a given load. Conventional methods based on the optical measure of the residual impression left behind upon load release represent a rather simple technique for a rapid evaluation of the surface mechanical properties. In the past two decades, depth‐sensing indentation devices based on the monitoring of the load and displacement throughout an indentation have progressively substituted traditional testers. Smaller loads can be applied capable of producing penetration depths in the nanoscale. Indentation hardness has nowadays gained widespread application in polymer science. Besides its aforementioned technical advantages, one has to add its extreme sensitivity to detect nanostructural changes occurring in polymer materials. Behind this ability is the intimate correlation between the mechanisms of local deformation and the polymer basic nanostructural entities. The present contribution intends to provide the reader a general overview of the state of the art of indentation hardness in relation to nanostructure and morphology in glassy and semicrystalline polymers including blends.

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A review of nanoindentation continuous stiffness measurement technique and its applications

Cited by 1,356 publications

References 24 publications

Multiscale Simulation of Surface Defects Influence Nanoindentation by a Quasi-Continuum Method

Multiscale Simulation of Surface Defects Influence Nanoindentation by a Quasi-Continuum Method

Determining the elastic-plastic properties of metallic materials through instrumented indentation

Hardness

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