Webinars

October 18th, 2018
8AM PDT  |  11AM EDT  |  15:00 GMT

In-situ nanomechanical testing inside a transmission electron microscope (TEM) provides unique insight into material dynamics at the micrometer, nanometer, and atomic scales. Recent advances in nanomechanical holder design, microscopy techniques, and detector technology enable unprecedented observations of small-scale material behavior under applied stress. In this webinar, Dr. Sanjit Bhowmick, Bruker, will discuss the design and capabilities of Bruker’s Hysitron PI 95 TEM PicoIndenter, along with an introduction to the wide variety of small-scale mechanical testing techniques that are possible inside a TEM. Dr. Christian Kübel, Karlsruhe Institute of Technology, will present a study on observing dynamic crystallographic changes and the Bauschinger effect within thin films under in-situ cyclic tensile strain.

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In-situ small scale mechanical testing has gained popularity over the last decade due to improvements in SEM platforms along with the development of small-format mechanical testing instrumentation suitable for the microscope chamber. The coupling of these two techniques allows researchers to precisely probe the sample surface while observing material deformation in real-time. This webinar discusses the wide variety of small-scale mechanical testing techniques that are possible inside the SEM.

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Materials behavior is often dominated by highly localized phenomena, and the ability to probe these local properties for engineering devices is critical. Often these devices are operating in environments with large differences in temperature and pressure: from the high vacuum and cold of space to the high temperature and high pressure inside a deep-water oil well. This webinar will focus on testing from room temperature down to -100°C on a variety of materials classes;

Metals/Composites: 
A fundamental study in a low carbon, 1018, steel is presented. This material is non-exotic, but plays a large role in the nuts and bolts of everyday life. 1018 steel is a two phase steel, containing both ferrite and pearlite phases that are easy to distinguish both via in contact SPM and high speed mapping of the steel, with the high C pearlite being much harder than the ferrite. This material also exhibits a ductile to brittle temperature transition at -5°C via Charpy impact testing. However, when the individual phases can be examined separately, the DBTT can be described to each phase. Besides a rapid increase in hardness, as the ability to cross-slip decreases, there is a change in the behavior of the load-displacement curve from smooth to heavily serrated flow dominated by pop-in behavior in the ferrite phase.

Polymer Films:
Determining the glass transition temperature of polymer films can be difficult due to specimen geometry that does not conform to typical macroscale test algorithms. Here, determination of polymer thin films is demonstrated by varying both temperature and frequency using a nanoscale equivalent test, nanoDMA III. Control of operating conditions below room temperature here is critical to understanding materials performance in a cold weather environment.

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Tribological properties play a critical role in the proper function, longevity, and energy efficiency of mechanical systems. The ability to quantitatively characterize surface interactions over the nanoscale and microscale provides a new understanding of how to better control friction and wear behavior in bulk material systems and thin tribological films.

In this webinar we will discuss the theory and applications of tribological and mechanical characterization over the nanometer to micrometer length scales. Practical applications will be presented relating to the field of lubricated sliding materials found in pistons, bearings, rubber gaskets, and other interacting components used in engines and power trains. We will demonstrate how nanoscale indentation and scratch testing provides powerful information for studying localized changes due to tribological processes and how these complimentary techniques provide greater insight to optimize tribological performance.

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Bruker’s nanoDMA^® III testing mode substantially increases the characterization capabilities throughout the Hysitron nanoindentation product family. nanoDMA III is an indentation-based dynamic mechanical analysis technique that superimposes a small force oscillation over a static load to deliver quantitative and repeatable mechanical characterization over the nanometer-to-micrometer length scales. This webinar discusses nanomechanical properties of elastic-plastic and viscoelastic materials and the influence of environmental conditions such as temperature & humidity. We will explore the material response to stress (creep & relaxation) and to an oscillating indenter probe at changing frequencies. Additionally, we will review possibilities to quantitatively map the elastic modulus of surfaces.

In this webinar, we provide a brief overview of quasi-static and dynamic nanoindentation, dynamic nanoindentation measurement theory and best practices, the applications of: depth profiling of elastic-plastic mechanical properties; viscoelastic characterization—storage modulus, loss modulus, tan-delta; and combined dynamic nanoindentation and environmental control.

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Nanoindentation techniques have long had an important role in quantitatively evaluating the mechanical properties of microstructural features. In recent years, high speed nanoindentation mapping techniques have been under development and have recently achieved speeds up to 6 indents/second, approximately 500x faster than traditional nanoindentation mapping methodologies. This enables a one-to-one correlation with other techniques, such as EBSD, and provides corresponding large data sets for robust statistical analysis. This correlation can produce high resolution structure-property relationships which can be mapped over sub-micron to several hundreds of micron length scales. High speed nanoindentation has numerous potential applications, from evaluation of microstructure-property evolution during processing, quality control testing of weld zones, evaluation of sub-surface damage gradients (wear, corrosion, irradiation), composite material interfaces, and more.

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The TriboScope^® seamlessly interfaces with Atomic Force Microscopes to deliver quantitative and repeatable mechanical and tribological characterization over the nanometer-to-micrometer length scales. By utilizing a rigid test probe, the TriboScope enables static and dynamic instrumented indentation. This webinar will discuss nanomechanical properties are obtained via AFM based nanoindentation comparing rigid probe vs cantilever based measurements. We will explore true force and displacement feedback control modes and cover applications from soft polymers to hard ceramics. Additionally, we will review nano-scratch, nano-wear and nanoDMA techniques and applications.

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Hysitron has partnered with Materials Today to bring you a series of educational webinars on recent research highlights, new applications, and novel tools & techniques in the nanomechanical testing community.

Each webinar features highly-regarded speakers from the research community and/or scientists from Hysitron. Webinars typically last one hour and also include a 10-15 minute Q&A session where attendees can interact with the speakers.

• Webinar 1: In-Situ Nanomechanical Testing Techniques
• Webinar 2: Novel Techniques for In-Situ Nanomechanical Testing in the Electron Microscope
• Webinar 3: Tools & Techniques for Nanomechanical Testing of Biomaterials
• Webinar 4: Tools & Techniques for Nanomechanical Testing of Biomaterials Part II: Softer Biomaterial Applications
• Webinar 5: Nanomechanical Characterization in Materials for Energy: Part I of III: Green and Renewable Energy
• Webinar 6: Nanomechanical Characterization in Materials for Energy: Part II of III: Electrochemistry and Applied Research
• Webinar 7: Nanomechanical Characteization in Materials for Energy:Part III of III: Irradiated Materials
• Webinar 8: High-Temperature Nanoindentation
• Webinar 9: Nanoscale Dynamic Mechanical Testing: New Innovations in Materials Characterization Part I
• Webinar 10: Advanced High Temperature Mechanical Testing: New Innovations in Materials Characterization Part II
• Webinar 11: Innovations in High Precision Thin Film Mechanical Property Characterization