Hay J.,Nanomechanics, Inc.
Conference Proceedings of the Society for Experimental Mechanics Series | Year: 2017
The Young’s moduli of individual silica microspheres, having a diameter of about 4 μm, are measured by compression testing inside an SEM chamber. The testing instrument is a nanoindenter, fitted with a frustum having a facediameter of 10 μm. While continuously monitoring force and deflection, each particle was compressed to failure. During this semi-static compression, a harmonic force dither having a frequency of 100 Hz was superimposed in order to obtain a continuous measure of particle stiffness. Using this continuous stiffness, the Young’s moduli are calculated according to a derivative form of an analytic model for compressing a sphere between two platens (Elastic compression of spheres and cylinders at point contact and line contact, CSIRO National Standards Laboratory Technical Paper, no. 25, 1969). At a compressive strain of 0.2%, the mean Young’s modulus is 73.6 ± 4.4 GPa (N = 12) which is exactly within the range of what we expect for soda-lime glass. The results are enhanced by in situ SEM images which reveal both plastic yield and fracture. © The Society for Experimental Mechanics, Inc. 2017.
Oliver W.C.,Nanomechanics, Inc. |
Pharr G.M.,University of Tennessee at Knoxville
MRS Bulletin | Year: 2010
This article is an edited transcript of the 2010 Innovation and Materials Characterization Award presentation given by Warren C. Oliver (Nanomechanics, Inc.) and George M. Pharr (University of Tennessee and Oak Ridge National Laboratory) on April 8, 2010 at the Materials Research Society Spring Meeting in San Francisco, CA, "for seminal contributions to the development of the instrumentation and analysis methods of nanoindentation for characterizing the mechanical properties of materials at the micrometer- and nanometer-length scales. Their work on nanoindentation has profoundly impacted all fields of materials research where mechanical behavior is important." The method we introduced in 1992 for measuring hardness and elastic modulus by nanoindentation testing has been widely adopted and used in the characterization of mechanical behavior at small scales. Since its original development, the method has undergone numerous refinements and changes brought about by improvements to testing equipment and techniques, as well as advances in our understanding of the mechanics of elastic-plastic contact. In this article, we briefly review the history of the method, comment on its capabilities and limitations, and discuss some of the emerging areas in materials research where it has played, or promises to play, an important role.
Phani P.S.,Nanomechanics, Inc. |
Oliver W.C.,Nanomechanics, Inc.
Acta Materialia | Year: 2016
Measuring the uniaxial creep response from nanoindentation has been of great interest to the small scale mechanics community. However, several experimental and modeling challenges pose obstacles to direct comparison of indentation and uniaxial results. In this work, new experimental procedures are developed to improve the precision and accuracy of high temperature nanoindentation tests. Indentation creep experiments are performed on commercial purity aluminum alloy at a number of temperatures up to 550 °C. The activation energy for creep was found to be 140.2KJ/mol/K, matching the value determined with high temperature uniaxial creep experiments extremely well. Uniaxial power-law creep parameters (stress exponent and pre-exponential term) are calculated from the indentation data for direct comparison of results to the uniaxial data. The results are in good agreement with the literature values for uniaxial compression/torsion tests over a wide range of strain rates and temperatures demonstrating the capabilities of high temperature indentation creep experiments. The relative contributions and interplay of indentation size effect, strain rate and temperature on the creep response is also explored. © 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Nanomechanics, Inc. | Date: 2014-06-03
An electrostatic force testing apparatus applies an electrostatic force to a test specimen and thereby imparts stress on the specimen. A focused electrostatic force is applied to the test specimen using a shaped probe tip of the electrostatic force testing apparatus. The force applied to the test specimen may be varied based on a distance of the probe tip from the test specimen, a voltage applied to the probe tip, and a shape of the probe tip.
Nanomechanics, Inc. | Date: 2016-03-22
A heated or cooled sample holding stage for use in a nanoindentation measurement system is described. The geometry of the design and the selection of materials minimizes movement of a sample holder with respect to a nanoindentation tip over a wide range of temperatures. The system controls and minimizes motion of the sample holder due to the heating or cooling of the tip holder and/or the sample holder in a high temperature nanoindentation system. This is achieved by a combination of geometry, material selection and multiple sources and sinks of heat. The system is designed to control both the steady state and the transient displacement response.
Nanomechanics, Inc. | Date: 2013-03-15
The application describes an electromechanical actuator for generating a mechanical force to be transferred to an apparatus. The electromechanical actuator comprises an electromagnetic coil, a connecting member, and a magnet. The connecting member is mechanically coupled between the electromagnetic coil and the apparatus and is configured to transfer the mechanical force from the electromagnetic coil to the apparatus. The magnet is disposed between the electromagnetic coil and the apparatus and includes a channel in which the electromagnetic coil is disposed, the channel having a channel opening that faces away from the apparatus, the magnet further having a central hole through which the connecting member extends.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2012
ABSTRACT: There has been growing interest in nano- and micro-scale testing of materials at increasingly elevated temperatures. However technological obstacles have limited the range of materials that can be tested and limited the temperatures that can be successfully reached for experimentation due to oxidation of the sample, thermal drift in the actuation and heat management of the system. For this Small Business Innovation Research Phase I project,"High-Temperature Microsample Testing System,"Nanomechanics Inc. (NMI) proposes to complete a conceptual design for a high-temperature microsample test system that can function in both tension and compression for samples from 500 degrees C to 1100 degrees C, with the purpose of completing a prototype of the system in Phase II. BENEFIT: The technology developed from this project will open up a new testing regime for those involved in micro- and nano-mechanical testing. High temperature, in situ testing will be possible for temperatures up to 1100 Celsius for nanoindentation experiments, as well as other microsample experiments such as tensile testing.
News Article | March 1, 2017
OAK RIDGE, Tenn., March 1, 2017 /PRNewswire/ -- Nanomechanics, Inc., a high technology instrument company comprised of world-class scientists and engineers with unparalleled expertise in materials science, precision mechanical design and advanced instrumentation software, will present the...
News Article | March 31, 2016
Home > Press > Nanomechanics Introduces Remote Video Option for iNano: The iNano nanoindenter now offers a Remote Video Option upgrade, giving labs a new window on materials testing Abstract: Nanomechanics Inc., a leading provider of tools used to test mechanical properties at the micro- and nano-levels, has introduced a new function for the iNano nanoindenter, the Remote Video Option. From the products inception, the iNano has allowed users to operate the system remotely, but this upgrade will allow users to view the tests from anywhere. Our customers run their experiments around the clock for optimal results, said John Swindeman, CEO at Nanomechanics Inc. With the Remote Video Option, the user can observe both test setup and sample-and-tip interaction, whether theyre in the lab or on the road. The product can be easily retrofitted to any existing iNano system, improving usability on the already user-friendly iNano device. Users get everything they need to begin recording out of the box, including a high-resolution USB camera with a magnification lock and adjustable polarizer ring, said Swindeman. They can mount the system and have it up and running in less than five minutes. A USB camera gives users two views, one of which monitors the sample and microscope during test setup, and another that focuses on the indenter tip during the test. Both views work seamlessly with the straightforward InView Review Data software. The Remote Video Option gives labs even more freedom to measure material properties and understand test results. The easily-operated, cutting-edge tool has the benefit of being affordable, which gives more organizations access to this convenient technology. For more information on the Remote Video Option call Nanomechanics, Inc., at 865-978-6490 or send an email to info (at) nanomechanicsinc (dot) com. About Nanomechanics Inc. Nanomechanics Inc., was developed by scientists and engineers with unparalleled expertise in materials science, precision mechanical design and advanced instrumentation software. Over the last 20 years, Nanomechanics has remained at the forefront of nanoscale mechanical testing technology. With decades of experience in the fields of nanomechanics and advanced instrumentation in OEM products and custom solutions, Nanomechanics Inc., strives to provide high performance modular devices and software that are designed for precision and ease-of use by the end user. To learn more about what Nanomechanics Inc., is doing worldwide, please visit nanomechanicsinc.com/ or contact us at info (at) nanomechanicsinc (dot) com. For more information, please click If you have a comment, please us. Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Nanomechanics Inc. Continues Growth in Revenue and Market Penetration Leading nanoindentation company reports continued growth in revenues and distribution channels on national and international scales
News Article | December 27, 2016
Home > Press > Nanomechanics Inc. Continues Growth in Revenue and Market Penetration: Leading nanoindentation company reports continued growth in revenues and distribution channels on national and international scales Abstract: Nanomechanics Inc., a leading provider of innovative tools for industry and academia that are designed to understand, evaluate, and test the mechanical performance of materials at the micro- and nano- levels, today reported their fourth quarter 2016 results, which showed continued year over year gains for the company. As we enter into the last week of 2016, the team at Nanomechanics has been taking a look back at an amazing year for our company, said John Swindeman, CEO at Nanomechanics Inc. From our Governors Award for Trade Excellence to our new service lab, we are grateful for an outstanding year and were looking forward to what we will accomplish in 2017. Nanomechanics currently offers their product lines through 16 distributors in 20 countries, with distribution of their testing tools available throughout Asia, Europe, North and South America. In addition to the continued growth in revenue and distribution channels, Nanomechanics has also had a number of accomplishments in 2016: Awards and Honors: In October 2016, Nanomechanics received the Governor's Award for Trade Excellence, while Dr. Warren Oliver, PhD, president of Nanomechanics, was awarded one of the highest professional distinctions in the engineering industry with his election to the National Academy of Engineering. Nanomechanics Inc. Recognition and Growth: The Nanomechanics team reported record growth in 2016 related to their products and services. In addition, Nanomechanics products were featured in a number of publications, including profiles on their high performance mechanical characterization iNano Nanoindenter, along with recognition on how their nano-indenters and nano-indentation testing is revolutionizing the industry. Nanomechanics Outreach and Seminars: Nanomechanics created a new agreement with Fast Forward Devices in 2016 to deliver revolutionary advancement in testing for academic and business use, along with offering a series of educational webinars that discussed nano-indentation techniques and testing. In addition, Nanomechanics was able to offer expert insight into the latest trends in nano-indentation with industry leaders throughout the year. For more information on the capabilities of the nano-indentation instrumentation offered by Nanomechanics or the extensive array of cost-effective, nano-scale indentation and nano-mechanical testing data available through the Nanomechanics Service Lab, visit Nanomechanicsinc.com About Nanomechanics Inc. Nanomechanics Inc. designs and produces advanced nano-scale metrology products, including turnkey nanoindenters, modular devices for nano-scale actuation and sensing, and contract testing. Drawing on decades of experience in material science, precision mechanical design, and instrumentation software, Nanomechanics offers products that satisfy the intense demands of both industry and academia, with unparalleled ease-of-use, accuracy, up-time, and technical support. In addition to turnkey solutions, Nanomechanics provides modular components to microscopy companies in order to integrate nano-scale mechanical testing with advanced visualization. To learn more about what Nanomechanics is doing worldwide, please visit nanomechanicsinc.com/ or contact us at . For more information, please click If you have a comment, please us. Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.