Abstract
Steel powders obtained by mechanical alloying of iron and graphite were compacted by high-pressure torsion. During high-pressure torsion, mean grain sizes rise from about 10 nm after mechanical alloying to about 20 nm. Vickers hardness reaches values of more than 10 GPa. Differential scanning calorimetry revealed superabundant vacancies present in concentrations up to 10-3. The results are discussed in terms of strain, strain rate, energy input and deformation mechanisms.
| Original language | English |
|---|---|
| Article number | 12234 |
| Pages (from-to) | 207-215 |
| Number of pages | 9 |
| Journal | Acta Materialia |
| Volume | 97 |
| DOIs | |
| Publication status | Published - Jul 15 2015 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys
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Borchers, C., Garve, C., Tiegel, M., Deutges, M., Herz, A., Edalati, K., Pippan, R., Horita, Z., & Kirchheim, R. (2015). Nanocrystalline steel obtained by mechanical alloying of iron and graphite subsequently compacted by high-pressure torsion. Acta Materialia, 97, 207-215. [12234]. https://doi.org/10.1016/j.actamat.2015.06.049