Finite element analysis of spherical indentation to study pile-up/sink-in phenomena in steels and experimental validation

Karthik, V.; Visweswaran, P.; Bhushan, Anand; Pawaskar, Dnyanesh N.; Kasiviswanathan, K.V.; Jayakumar, T.; Raj, Baldev

doi:10.1016/j.ijmecsci.2011.09.009

Cited by 72 publications

(41 citation statements)

References 26 publications

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“…In general, the hardness, H, defined as the load on the indenter normalized with the projected contact area of the hardness impression (see Figure 21), should be independent of the depth of penetration, h. However, over the past 60 years, it was observed that there were significant variations of hardness with respect to penetration depth, especially when the depths decreased to less than a few micro-meters [54][55][56][57][58][59][60]. In addition, two types of indentation size effects have been reported.…”

Section: Nanoindentation Size Effect Of Materialsmentioning

confidence: 99%

“…One is the normal ISE (the tip is pyramidal or conical)-the hardness increases with decreasing penetration depths, according to the expression "smaller is stronger" (see Figure 21). Another one is the reverse ISE (the tip is spherical) [55,56,61], which displayed that the hardness decreases with increasing depths. However, for the reverse ISE, it was observed that the hardness also increases with the decreasing of tip radius.…”

Section: Nanoindentation Size Effect Of Materialsmentioning

confidence: 99%

“…Richter et al [55] applied the molecular dynamics technique to study the nanoindentation of graphite and diamond to support their experimental studies, giving an atomistic description of the indentation process.…”

Section: Other Materialsmentioning

confidence: 99%

“…Indeed, since our model uses dislocation density for the calculation of plastic contribution, our method provides a way to describe indentation size effect and constitutes an alternate approach to the strain gradient theories [54][55][56][57].…”

Section: General Conclusion On the Dynamical Approach To Nanoindentamentioning

confidence: 99%

“…The common modeling methods are finite element [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41], crystal plasticity [42][43][44][45][46][47][48][49][50], discrete dislocation dynamics [51][52][53][54][55][56][57][58][59][60][61][62], the quasicontinuum method [63][64][65][66][67][68][69][70][71][72][73][74][75][76] and molecular dynamics (MD) [77][78][79][80][81][82]…”

Section: Introductionmentioning

confidence: 99%

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Section: Nanoindentation Size Effect Of Materialsmentioning

confidence: 99%

Section: Nanoindentation Size Effect Of Materialsmentioning

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Section: Other Materialsmentioning

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Section: General Conclusion On the Dynamical Approach To Nanoindentamentioning

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Section: Introductionmentioning

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Electronic materials such as semiconductors, piezo‐ and ferroelectrics, and metal oxides are primary constituents in sensing, actuation, nanoelectronics, memory, and energy systems. Although significant progress is evident in understanding the mechanical and electrical properties independently using conventional techniques, simultaneous and quantitative electromechanical characterization at the nanoscale using in situ techniques is scarce. It is essential because coupling/linking electrical signal to the nanoscale plasticity provides vital information regarding the real‐time electromechanical behavior of materials, which is crucial for developing miniaturized smarter technologies. With the advent of conductive nanoindentation, researchers have been able to get valuable insights into the nanoscale plasticity (otherwise not possible by conventional means) in a wide variety of bulk and small‐volume materials, quantify the electromechanical properties, understand the dielectric breakdown phenomenon and the nature of electrical contacts in thin films, etc., by continuously monitoring the real‐time electrical signal changes during any point on the indentation load–hold–unload cycle. This comprehensive Review covers probing the electromechanical behavior of materials using in situ conductive nanoindentation, data analysis methods, the validity of the models and limitations, and electronic conduction mechanisms at the nanocontacts, quantification of resistive components, applications, progress, and existing issues, and provides a futuristic outlook.

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Finite element analysis of spherical indentation to study pile-up/sink-in phenomena in steels and experimental validation

Cited by 72 publications

References 26 publications

Crystal Indentation Hardness

Crystal Indentation Hardness

Computer Simulation and Experimental Analysis of Nanoindentation Technique

Understanding Nanoscale Plasticity by Quantitative In Situ Conductive Nanoindentation

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