Fig. 1. GH3536 alloy powder. (a) Powder morphology; (b) size distribution

Fig. 2. Shape and dimension of low cycle fatigue specimen (unit: mm)

Fig. 3. Cyclic stress response curves of GH3536 alloy formed by selective laser melting (SLM) at different strain amplitudes. (a) Room temperature (RT); (b) 800 ℃

Fig. 4. Hysteresis loops at half-life of GH3536 alloy formed by SLM at different strain amplitudes. (a) Room temperature; (b) 800 ℃

Fig. 5. Cyclic stress-strain relationship of GH3536 alloy formed by SLM at room temperature and 800 ℃

Fig. 6. Strain-life curves of GH3536 alloy formed by SLM. (a) Room temperature; (b) 800 ℃

Fig. 7. Low cycle fatigue fracture morphologies of GH3536 alloy formed by SLM tested at room temperature. (a) Macro-fracture at 0.4% strain amplitude; (b) amplified view of crack initiation site at 0.4% strain amplitude; (c) fatigue striations at 0.4% strain amplitude; (d) macro-fracture at 1.2% strain amplitude; (e) amplified view of crack initiation site at 1.2% strain amplitude; (f) fatigue striations at 1.2% strain amplitude

Fig. 8. Low cycle fatigue fracture morphologies of GH3536 alloy formed by SLM tested at 800 ℃. (a) Macro-fracture at 0.4% strain amplitude; (b) amplified view of crack initiation site at 0.4% strain amplitude; (c) fatigue striations at 0.4% strain amplitude; (d) macro-fracture at 1.2% strain amplitude; (e) amplified view of crack initiation site at 1.2% strain amplitude; (f) fatigue striations at 1.2% strain amplitude

Fig. 9. Microstructures of GH3536 alloy formed by SLM after low cycle fatigue fracture at room temperature. (a) 0.4% strain amplitude; (b) 0.4% strain amplitude; (c) 0.8% strain amplitude; (d) 1.2% strain amplitude

Fig. 10. Microstructures of GH3536 alloy formed by SLM after low cycle fatigue fracture at 800 ℃. (a) 0.25% strain amplitude; (b) 0.4% strain amplitude; (c) 0.8% strain amplitude; (d) 1.2% strain amplitude

Fig. 11. Plastic strain energy life prediction model and prediction results. (a) Relationship between plastic strain energy at half-life and cyclic number to failure; (b) the results of fatigue life prediction