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Hardness after different combinations of HPT deformation and heat treatment.
| Condition | Hardness [HV 0.05] |
|---|---|
| HPT (2 rot) | 83.0 ± 3.8 HV |
| HPT (2 rot) + HT (1 h/142 °C) | 111.1 ± 3.5 HV |
| HPT (2 rot) + HT (1 h/142 °C) + HPT (2 rot) | 86.6 ± 4.6 HV |
| HPT (2 rot) + HT (1 h/142 °C) + HPT (2 rot) + HT (1 h/142 °C) | 104.6 ± 3.7 HV |
