Elevated Temperature Mechanical Testing

National Laboratory: 
Los Alamos National Laboratory
Characterization Class: 
Extreme Environment Testing
Mechanical Behavior of Materials
Description: 

LANL can perform mechanical testing (tensile, compressive, and shear) on materials at temperatures up to 1000°C in vacuum or inert gas. Additional capability exists for doing this at high strain rates (up to 4000/s). Strain is measured using digital image correlation. A proven capability for sheet materials has been developed and proven on advanced, high-strength, steel alloys. In-situ characterization can include digital image correlation (available at both high and low strain rates) and high-speed thermal imaging of deforming specimens.

Capability Bounds: 

Typical tensile specimen size is 16 mm by 4 mm by 0.75 mm. Typical compression height is 5mm diameter x 4mm. Multiple shear geometries employed.

Unique Aspects: 

Mechanical test setup allows for direct measurement of strain on specimens using digital image correlation at elevated temperatures. Long-standing experience employing these techniques to a wide range of metals, alloys, polymers, composites, and ceramics exists at LANL.

Availability: 

No major use limitations.

Single Point of Contact: 

Stuart Maloy, Team Leader, maloy@lanl.gov, 505-667-9783

References: 
  1. L. Bodelot, J.P. Escobedo-Diaz, C.P. Trujillo, D.T. Martinez, E.K. Cerreta, G.T. Gray III, G. Ravichandran. 'Microstructural Changes and In-situ Observation in OFHC Localized Copper Under Dynamic Loading' International Journal of Plasticity, 75 (2015) 58-74.
  2. G. T. Gray III, K.S. Vecchio, V. Livescu, 'Compact Forced Simple Shear for Studying Shear Localization in Materials' Acta Materialia, 103( 2016) 12-22.
  3. C.M. Cady, S-R, Chen, G.T. Gray III, D.A. Korzekwa, and J.F. Bingert, "Dynamic Materials Testing, Texture, and Yield Surface Calculation of an Automotive Sheet Steel" Metallurgical and Materials Transactions A, 31 (2000) 2439-2448.
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