Abstract
Despite advances in mechanical testing at small scales and testing at high strain rates, studies of mechanical behavior of materials remain largely qualitative in the regimes where these two conditions overlap. Here, we present an approach based on microparticle impact indentation to determine material hardness at micron scales and at high strain rates. We employ laser ablation to impact ceramic alumina microparticles (as indenter) onto two model materials, namely copper and iron. We use real time measurements of impact and rebound velocities together with post-impact measurements of indentation volume to determine material hardness at strain rates beyond 106 s−1.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 198-202 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 177 |
| DOIs | |
| State | Published - Mar 1 2020 |
Funding
This work was primarily supported at MIT by the U.S. Department of Energy , Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0018091 . MH's work at Cornell was supported through a cooperative research agreement with the U. S. Army Research Laboratory, Contract: W911NF-15-2-0034, and the Cornell Center for Materials Research Shared Facilities which supported through the NSF MRSEC program (DMR-1719875). This work was primarily supported at MIT by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0018091. MH's work at Cornell was supported through a cooperative research agreement with the U. S. Army Research Laboratory, Contract: W911NF-15-2-0034, and the Cornell Center for Materials Research Shared Facilities which supported through the NSF MRSEC program (DMR-1719875).
Keywords
- Hardness
- High strain rate
- Impact
- Indentation
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys