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Small scale mechanical characterization of thin foil materials via pin load microtesting

Journal Article · · Experimental Mechanics
 [1];  [2];  [3];  [4];  [3]
  1. MicroTesting Solutions LLC, Columbus, OH (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Rolls Royce LG Fuel Cell Systems Inc., North Canton, OH (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Vermont, Burlington, VT (United States)
In situ scanning electron microscope (SEM) experiments, where small-scale mechanical tests are conducted on micro- and nanosized specimens, allow direct visualization of elastic and plastic responses over the entirety of the volume being deformed. This enables precise spatial and temporal correlation of slip events contributing to the plastic flow evidenced in a stress–strain curve. A new pin-loading methodology has been employed, in situ within the SEM, to conduct microtensile tests on thin polycrystalline metal foils. This approach can be tailored to a specific foil whose particular grain size may range from microns to tens of microns. Manufacture of the specialized pin grip was accomplished via silicon photolithography-based processing followed by subsequent focused ion beam finishing. Microtensile specimen preparation was achieved by combining a stencil mask methodology employing broad ion beam sputtering along with focused ion beam milling in the study of several metallic foil materials. Finite-element analyses were performed to characterize the stress and strain distributions in the pin grip and micro-specimen under load. Furthermore, under appropriately conceived test conditions, uniaxial stress–strain responses measured within these foils by pin-load microtensile testing exhibit properties consistent with larger scale tests.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Temperature Materials Laboratory (HTML)
Sponsoring Organization:
ORNL work for others; USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1331076
Journal Information:
Experimental Mechanics, Journal Name: Experimental Mechanics Journal Issue: 7 Vol. 55; ISSN 0014-4851
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (25)

Simultaneously Increasing the Ductility and Strength of Ultra-Fine-Grained Pure Copper journal November 2006
In-situ tensile testing of nano-scale specimens in SEM and TEM journal March 2002
Mechanical properties of thin films journal November 1989
In-situ tensile testing of nano-scale specimens in SEM and TEM journal March 2002
Mechanical properties of thin films journal November 1989
In-Situ Mechanical Testing for Characterizing Strain Localization During Deformation at Elevated Temperatures journal May 2011
Micro- and nanoscale tensile testing of materials journal March 2009
Insights Gained Through Image Analysis During In Situ Micromechanical Experiments journal January 2012
A further step towards an understanding of size-dependent crystal plasticity: In situ tension experiments of miniaturized single-crystal copper samples journal February 2008
A combined experimental and simulation study to examine lateral constraint effects on microcompression of single-slip oriented single crystals journal September 2009
Materials processing for lithium-ion batteries journal March 2011
Femtosecond laser micromachining of a single-crystal superalloy journal September 2005
Application of micro-sample testing to study fundamental aspects of plastic flow journal March 2006
Tensile Strength of Whiskers journal December 1956
Elastic Properties of Metals and Alloys. II. Copper journal October 1974
Stencil mask methodology for the parallelized production of microscale mechanical test samples journal May 2012
Small-scale patterning methods for digital image correlation under scanning electron microscopy journal October 2011
What is the Young's Modulus of Silicon? journal April 2010
Silicon as a mechanical material journal May 1982
What is the Young's Modulus of Silicon? journal April 2010
Plasticity in Confined Dimensions journal June 2010
Microscale Characterization of Mechanical Properties journal August 2007
Mechanical Properties of Thin Films journal August 1990
Quantitative In Situ Mechanical Testing in Electron Microscopes journal May 2010
Silicon as a Mechanical Material journal January 1986

Cited By (2)

Novel Methods for Recording Stress-Strain Curves in Proton Irradiated Material journal March 2020
On the Application of Xe+ Plasma FIB for Micro-fabrication of Small-scale Tensile Specimens journal July 2019

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