Experimental data from service-like creep-fatigue experiments on grade P92 steel

Area of Science:

• Materials Science
• Mechanical Engineering
• Metallurgy

Background:

• High-temperature steels like P92 are crucial for power generation components.
• Understanding creep-fatigue behavior under service-like conditions is vital for component integrity.
• Standard tests may not fully capture complex loading experienced in real-world applications.

Purpose of the Study:

• To present experimental mechanical data from novel service-like creep-fatigue tests on P92 steel.
• To provide a dataset for analyzing cyclic softening and stress-strain hysteresis.
• To support the development of advanced lifetime models for components under creep-fatigue loading.

Main Methods:

• Isothermal creep-fatigue experiments conducted at 620°C with a 0.2% strain amplitude.
• Three types of tests were performed: standard relaxation fatigue (RF), strain-controlled service-like relaxation (SLR), and partly stress-controlled service-like creep (SLC).
• Data collected include cyclic deformation (stresses) and full hysteresis loops for each fatigue cycle.

Main Results:

• Detailed cyclic deformation and hysteresis data were obtained from three distinct creep-fatigue test conditions.
• The datasets capture the material's response to combined stress- and strain-controlled dwell times.
• The data allow for the approximation of cyclic softening and detailed analysis of stress-strain hystereses.

Conclusions:

• The presented data from non-standard service-like tests are valuable for material characterization.
• These datasets can inform the design of future complex experiments and analyses.
• The findings contribute essential input for advanced parametric lifetime modeling and model calibration.