Thermal drift in room temperature nanoindentation experiments: Measurement and correction

Verma, Sandhya; Sarkar, Prakash; Pant, Prita

doi:10.1557/s43578-021-00386-0

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…While this is in accordance with the observations of some authors, others assumed or measured a linear progression. [19,39,41] These inconsistencies may be due to different testing or loading conditions. In addition, environmental conditions, mainly room temperature, might influence the thermal drift.…”

Section: Thermal Drift Correctionmentioning

confidence: 99%

“…Thermal drift is a well-known phenomenon also during quasistatic nanoindentation. [38,39] Therefore, many devices provide built-in options for drift correction. These are usually based on monitoring the displacement for a certain period of time before the actual test while maintaining a constant, very low load.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to the findings reported by Cairney et al that support this assumption, other investigations on drift during quasistatic experiments have shown that it may not always be true. [19,39,41] For example, a quadratic relationship was observed between drift and time for long-term measurements and the authors therefore proposed that the holding time prior to the experiment should equal the duration of the indentation experiment. [39,41] A different approach is to use so-called reference segments at the beginning of the test during which initial values are determined, e.g., for the indent displacement in creep tests or for contact modulus in dynamic measurements.…”

Section: Introductionmentioning

confidence: 99%

“…[19,39,41] For example, a quadratic relationship was observed between drift and time for long-term measurements and the authors therefore proposed that the holding time prior to the experiment should equal the duration of the indentation experiment. [39,41] A different approach is to use so-called reference segments at the beginning of the test during which initial values are determined, e.g., for the indent displacement in creep tests or for contact modulus in dynamic measurements. [32,38,42] Based on these values, which are presumably unaffected by significant thermal drift, the indent or contact area is continuously calculated throughout the measurement.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

et al. 2023

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Cyclic nanoindentation allows characterizing the influence of single phases and their interactions on fatigue mechanisms. Herein, a method for high cycle fatigue testing by nanoindentation is presented. By combining high‐ and low‐frequency indentation modes, high cycle numbers are achieved while obtaining sufficient data points to reconstruct force–displacement hysteresis loops. A challenge is the stochastic course of thermal drift which is addressed by measuring drift rate in regular low‐force holding segments. Drift rates are used to correct the displacement values, yielding reproducible cyclic deformation data as it is shown for two very different materials, a ductile metal and a brittle ceramic.

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Section: Thermal Drift Correctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

et al. 2023

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“…It is important that the uniformity of temperatures between indenter and specimen be guaranteed at both elevated and low temperature indentation tests [ 12 , 13 ]. The temperature difference will inevitably cause contact thermal drifting during the penetration process, as well as inaccurate and unreliable P - h curves [ 14 ]. Meanwhile, the testing environment including oxygen-free [ 15 ] and steam-free [ 16 ] environment (usually implemented using vacuum chamber), is also considered in indentation to ensure that the specimen surface maintains its initial properties.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Induced Internal Stress Influence on Specimens in Indentation Tests

Wang

Zhao

2022

Micromachines

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The factors affecting the internal stress of specimens during indentation tests were investigated by finite element analysis (FEA) modelling. This was carried out to gain a qualitative understanding of the test errors introduced by the temperature environment during the indentation process. In this study, the influence of thermal expansion of fixed stage on upper specimen (currently neglected in temperature indentation) was explored in detail. Technical issues associated with the parameters of the specimen (such as thickness, width, and elastic modulus) and external conditions (such as stage and glue) were identified and addressed. The test error of the calculated hardness and elastic modulus of the specimen reached up to more than 3% simultaneously at −196 °C (temperature of liquid nitrogen). Based on these considerations, the preferred operation conditions were identified for testing in specific temperature environment. These results can guide experiments aimed at obtaining precise mechanical parameters.

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Profilometry‐Based Indentation Plastometry at High Temperature

Tammpere,

McKeown,

Miller

et al. 2024

Adv Eng Mater

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This is a first report on profilometry‐based indentation plastometry (PIP) at high temperature (HT), covering both thermal characterization and issues for obtaining stress–strain curves. The heating system has a relatively low thermal inertia, reaching 800 °C within about 10 min, while both indentation (≈20 s) and cooling (≈20 min) are also quick. This capability is useful in terms of limiting exposure of the sample to prolonged periods at HT, and hence avoiding the formation of thick oxide layers (which can affect indent profiles and hence inferred stress–strain curves). There is good general consistency between stress–strain curves obtained via HT‐PIP and those from tensile testing. However, the possibility of creep (time‐dependent deformation) affecting the outcomes (of both types of test), particularly at higher temperatures, should be borne in mind. Creep has a characteristic effect on tensile curves, which can often be confirmed and investigated by changing the imposed strain rate. It can also be revealed by carrying out the HT‐PIP testing with different penetration velocities or by monitoring the shape of the load–displacement plot.

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Thermal drift in room temperature nanoindentation experiments: Measurement and correction

Cited by 17 publications

References 27 publications

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

Temperature-Induced Internal Stress Influence on Specimens in Indentation Tests

Profilometry‐Based Indentation Plastometry at High Temperature

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