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Post-manufacture heat treatment and shot peening conditions
| Sample | Material | Heat treatment parameters | Shot Peening parameters | |||||
|---|---|---|---|---|---|---|---|---|
| Solution treatment | Ageing | |||||||
| Temperature [°C] | Time [min] | Temperature [°C] | Time [min] | Working pressure [MPa] | Time [min] | Medium | ||
| RP | Conventional | - | - | - | - | - | - | - |
| RD | DMLS | - | - | - | - | - | - | - |
| STP | Conventional | 1040 | 40 | - | - | - | - | - |
| STD | DMLS | 1040 | 40 | - | - | - | - | - |
| PHP | Conventional | 1040 | 40 | 450 | 240 | - | - | - |
| PHD | DMLS | 1040 | 40 | 450 | 240 | - | - | - |
| PHPG | Conventional | 1040 | 40 | 450 | 240 | 0.4 | 2 | Glass |
| PHDG | DMLS | 1040 | 40 | 450 | 240 | 0.4 | 2 | Glass |
| PHPS | Conventional | 1040 | 40 | 450 | 240 | 0.4 | 2 | Steel |
| PHDS | DMLS | 1040 | 40 | 450 | 240 | 0.4 | 2 | Steel |
| PHPC | Conventional | 1040 | 40 | 450 | 240 | 0.4 | 2 | Ceramic |
| PHDC | DMLS | 1040 | 40 | 450 | 240 | 0.4 | 2 | Ceramic |
Chemical composition of reference 17-4PH after DMLS fabrication
| Element | C | Cr | Ni | Cu | Mn | Si | Mo | Nb | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|
| RD as-manufactrued | Wt. [%] | 0.04 | 15.95 | 4.72 | 4.6 | 0.69 | 0.71 | 0.12 | 0.26 | Bal. |
| GP1 powder (EOS declaration) | <0.07 | 15-17.5 | 3-5 | 3-5 | <1 | <1 | <0.5 | 0.15-0.45 | Bal. | |
| ASTM A564 | <0.07 | 15-17.5 | 3-5 | 3-5 | <1 | 1 | <0.5 | 0.15-0.45 | Bal. | |
| EN10088-1 | <0.07 | 15-17 | 3-5 | 3-5 | <1.5 | <0.7 | <0.6 | 5*C-0.45 | Bal. | |