Tensile behavior of nanocrystalline copper

Technical Report · Wed Nov 01 04:00:00 EST 1995

DOI:https://doi.org/10.2172/201763· OSTI ID:201763

Sanders, P G; Weertman, J R ^[1]; Eastman, J A ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

High density nanocrystalline copper produced by inert gas condensation was tested in tension. Displacements were measured using foil strain gauges, which greatly improved the accuracy of the strain data. The Young`s modulus of nanocrystalline copper was found to be consistent with that of coarse-grained copper. Total elongations of {approx} 1% were observed in samples with grain sizes less than 50 nm, while a sample with a grain size of 110 nm exhibited more than 10% elongation, perhaps signifying a change to a dislocation-based deformation mechanism in the larger-grained material. In addition, tensile tests were performed as a function of strain rate, with a possible trend of decreased strength and increased elongation as the strain rate was decreased.

• Research Organization: Argonne National Lab., IL (United States); Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-86ER45229; W-31109-ENG-38
• OSTI ID: 201763
• Report Number(s): ANL/MSD/CP--86112; CONF-951026--10; ON: DE96005217
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
DEFORMATION
EXPERIMENTAL DATA
GRAIN SIZE
MECHANICAL PROPERTIES
MECHANICAL TESTS
TENSILE PROPERTIES
YIELD STRENGTH
YOUNG MODULUS