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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium 30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
Presentation Title Process-structure-property-performance Relations for High-pressure Cold-sprayed Metals via Nanoindentation Stress-strain Measurements
Author(s) Bryer Sousa, Jennifer Hay, Danielle L. Cote
On-Site Speaker (Planned) Bryer Sousa
Abstract Scope Comprehensive mechanical characterization of cold-sprayed metals is critical as they are increasingly used for solid-state additive manufacturing and repair. Nanoindentation is an attractive, high-throughput technique because it is suitable for small volumes and requires minimal sample preparation. In this work, an emergent nanoindentation method was applied to a range of high-pressure, cold-spray material consolidations made by systematically varied process parameters. The nanoindentation method used a flat-ended conical indenter to measure stress-strain curves and scalars derived therefrom, including yield stress and work-hardening exponent. We discerned processing-structure-property-performance relations for cold sprayed tantalum, steel, aluminum, and other material consolidations with these measurements. Before testing cold-sprayed metals, the flat-punch nanoindentation method was validated by comparing its stress-strain curves with uniaxial tensile curves and spherical nanoindentation curves for several different metals.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Mechanical Properties, Characterization

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