Abstract
The potential applications of quasicrystals (QCs) in automotive and aerospace industries requires the investigation of their fracture and failure mechanisms under dynamic loading conditions. In this study, Al-Cr-Fe powders were consolidated into pellets using spark plasma sintering at 800 °C for 30 min. The microhardness and dynamic failure properties of the samples were determined using nanoindentation and split-Hopkinson pressure bar technique, respectively. Scanning electron microscopy and transmission electron microscopy were employed to analyze fracture particles. The dynamic failure strength obtained from the tests is 653 ± 40 MPa. The dynamic failure process is dominated by transgranular fracture mechanisms. The difficulty in the metadislocation motion in the dynamic loading leads to the high brittleness of the spark plasma sintered (SPSed) Al-Cr-Fe materials.
| Original language | English |
|---|---|
| Article number | 385 |
| Journal | Crystals |
| Volume | 8 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 10 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© by the authors. Licensee MDPI, Basel, Switzerland.
ASJC Scopus Subject Areas
- General Chemical Engineering
- General Materials Science
- Condensed Matter Physics
- Inorganic Chemistry
Keywords
- Fracture
- Microstructures
- Quasicrystals
- Spark plasma sintering
- Transmission electron microscopy