Experimental and modeling results of creep fatigue life of Inconel 617 and Haynes 230 at 850 C

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2012.08.040· OSTI ID:1055119

Chen, Xiang ^[1]; Sokolov, Mikhail A ^[1]; Sham, Sam ^[1]; ERDMAN, III, DONALD L ^[1]; Busby, Jeremy T ^[1]; Mo, Kun ^[1]; Stubbins, James ^[1]

---

1. ORNL

Creep fatigue testing of Ni-based superalloy Inconel 617 and Haynes 230 were conducted in the air at 850 C. Tests were performed with fully reversed axial strain control at a total strain range of 0.5%, 1.0% or 1.5% and hold time at maximum tensile strain for 3, 10 or 30 min. In addition, two creep fatigue life prediction methods, i.e. linear damage summation and frequency-modified tensile hysteresis energy modeling, were evaluated and compared with experimental results. Under all creep fatigue tests, Haynes 230 performed better than Inconel 617. Compared to the low cycle fatigue life, the cycles to failure for both materials decreased under creep fatigue test conditions. Longer hold time at maximum tensile strain would cause a further reduction in both material creep fatigue life. The linear damage summation could predict the creep fatigue life of Inconel 617 for limited test conditions, but considerably underestimated the creep fatigue life of Haynes 230. In contrast, frequency-modified tensile hysteresis energy modeling showed promising creep fatigue life prediction results for both materials.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1055119
• Journal Information: Journal of Nuclear Materials, Vol. 432, Issue 1-3; ISSN 0022-3115
• Country of Publication: United States
• Language: English