Temperature dependence of strain rate sensitivity, indentation size effects and pile-up in polycrystalline tungsten from 25 to 950 °C

Beake, Ben D.; Harris, Adrian; Moghal, Jonathan; Armstrong, David E.J.

doi:10.1016/j.matdes.2018.06.063

Cited by 34 publications

(9 citation statements)

References 49 publications

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“…Additional research has applied ISE analysis to hardness versus depth data with an upper indentation depth bound of 3000 nm in [69], whereas Kim et al did so with upper bounds ranging from 1000 to 25,000 nm in [70], and Beake et al considered maximum depths between 1500 and 2000 nm in [71]. Future work will consider the implications of the work performed by Prasitthipayong et al since they were able to successfully apply the ISE analysis with indentation depths up to approximately 400 nm in [72], which is reasonably close to an h p max of 380 nm.…”

Section: Indentation Size Effectsmentioning

confidence: 99%

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Sousa

Gleason

Haddad

et al. 2020

Metals

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Cold gas-dynamic spray is a solid-state materials consolidation technology that has experienced successful adoption within the coatings, remanufacturing and repair sectors of the advanced manufacturing community. As of late, cold spray has also emerged as a high deposition rate metal additive manufacturing method for structural and nonstructural applications. As cold spray enjoys wider recognition and adoption, the demand for versatile, high-throughput and significant methods of particulate feedstock as well consolidated materials characterization has also become more notable. In order to address the interest for such an instrument, nanoindentation is presented herein as a viable means of achieving the desired mechanical characterization abilities. In this work, conventionally static nanoindentation testing using both Berkovich and spherical indenter tips, as well as nanoindentation using the continuous stiffness measurement mode of testing, will be applied to a range of powder-based feedstocks and cold sprayed materials.

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Section: Indentation Size Effectsmentioning

confidence: 99%

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Sousa

Gleason

Haddad

et al. 2020

Metals

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“…32 Concurrently, various associated instrumentation technologies, calibration methods, and experimental protocols have been reported, an overview of which can be found here. 22,[33][34][35] There has been an upward trend in the highest test temperatures reported in nanoindentation using various instruments [36][37][38][39][40] off late.…”

Section: Review Of Scientific Instrumentsmentioning

confidence: 99%

Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °C

Conte

Mohanty

Schwiedrzik

et al. 2019

Review of Scientific Instruments

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ARTICLE scitation.org/journal/rsiNovel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 ○ C Cite as: Rev. Sci. Instrum. 90, 045105 (2019); ABSTRACT High temperature nanoindentation is an emerging field with significant advances in instrumentation, calibration, and experimental protocols reported in the past couple of years. Performing stable and accurate measurements at elevated temperatures holds the key for small scale testing of materials at service temperatures. We report a novel high temperature vacuum nanoindentation system, High Temperature Ultra Nanoindentation Tester (UNHT 3 HTV), utilizing active surface referencing and non-contact heating capable of performing measurements up to 800 ○ C. This nanoindenter is based on the proven Ultra Nano-Hardness Tester (UNHT) design that uses two indentation axes: one for indentation and another for surface referencing. Differential displacement measurement between the two axes enables stable measurements to be performed over long durations. A vacuum level of 10 −7 mbar prevents sample surface oxidation at elevated temperatures. The indenter, reference, and sample are heated independently using integrated infrared heaters. The instrumental design details for developing a reliable and accurate high temperature nanoindenter are described. High temperature calibration procedures to minimize thermal drift at elevated temperatures are reported. Indentation data on copper, fused silica, and a hard coating show that this new generation of instrumented indenter can achieve unparalleled stability over the entire temperature range up to 800 ○ C with minimum thermal drift rates of <2 nm/min at elevated temperatures.

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“…Significant progress in high-temperature nanoindentation testing has been made over the last decade, opening the way to the investigation of thermally activated mechanisms at different length scales. Micron-scale measurements of the hardness, Young's modulus and even creep properties at temperatures up to 800°C and beyond now appear feasible [1][2][3][4] . A recent paper of Baral et al 5 has also highlighted the ability of high-temperature nanoindentation to investigate in situ microstructural evolution, i.e., static recrystallization 6 , in an aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Scanning Indentation: A new method to investigate in situ metallurgical evolution along temperature ramps

Tiphéne

Baral

Comby-Dassonneville

et al. 2021

Journal of Materials Research

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A new technique, High-Temperature Scanning Indentation (HTSI), is proposed to investigate metallurgical evolution occurring during anisothermal heat treatments. This technique is based on the use of high-speed nanohardness measurements carried out during linear thermal ramping of the system with appropriate settings. A specific high-speed loading procedure, based on a quarter sinus loading function, a creep segment and a three-steps unloading method, permits the measurement of elastic, plastic and creep properties. The indentation cycle lasts one second to minimize thermal drift issues. This approach enables quasi-continuous measurements of elastic modulus and hardness as a function of temperature in much shorter times than previous techniques. The HTSI technique is validated on fused silica and pure aluminum. The application to cold-rolled aluminum undergoing thermal cycling highlights the potential of the HTSI technique to investigate in situ thermally activated mechanisms linked with microstructural changes such as viscoplasticity, static recovery and recrystallization mechanisms in metals. Results on aluminum were confirmed using Electron Back-Scattering Diffraction measurements.

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Temperature dependence of strain rate sensitivity, indentation size effects and pile-up in polycrystalline tungsten from 25 to 950 °C

Cited by 34 publications

References 49 publications

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °C

High-Temperature Scanning Indentation: A new method to investigate in situ metallurgical evolution along temperature ramps

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Temperature dependence of strain rate sensitivity, indentation size effects and pile-up in polycrystalline tungsten from 25 to 950 °C

Cited by 34 publications

References 49 publications

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties

Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °C

High-Temperature Scanning Indentation: A new method to investigate in situ metallurgical evolution along temperature ramps

Contact Info

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Temperature dependence of strain rate sensitivity, indentation size effects and pile-up in polycrystalline tungsten from 25 to 950 °C