About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
|
Presentation Title |
H-2: Investigating the Strain Rate Dependence of Hardness of Cu/Mo Nanolaminate Films Using Conventional and High Strain Rate Nanoindentation Methods |
Author(s) |
Wesley Higgins, Christopher Walker, Benjamin Hackett, George Pharr |
On-Site Speaker (Planned) |
Wesley Higgins |
Abstract Scope |
Recent advances in commercially available nanoindentation systems make it possible to measure indenter displacements at up to 100 kHz data acquisition rates and thereby conduct nanoindentation tests at high strain rates. Such a system was used to examine the strain rate dependence of the hardness of Cu/Mo nanolaminate thin films comprised of two bilayer thicknesses of 5 and 100 nm as well as monolithic films of Cu and Mo. However, the commercial system was not designed with high strain rate testing in mind, resulting in various limitations in the measurements. To circumvent this, the same films were also tested using a new, custom-designed nanoindentation system that incorporates a hexapod translation stage and gantry for very high frame stiffness and a laser interferometer for measuring tip displacement at rates as high as 10 MHz. Results from the two systems are compared and discussed in terms of the relative advantages and limitations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Other |