High-Temperature Low-Cycle Fatigue Behavior of 625 Nickel-Base Superalloy Welding Joint

Abstract:

High temperature low cycle fatigue properties and fracture behavior of Inconel 625 nickel-base superalloy welding joint at 760^oC were investigated under fully reversed total strain-controlled mode. The fatigue life and cyclic stress-strain data were analyzed to determine the individual strain fatigue parameters. It is noted that the welding joint exhibits the cyclic strain hardening and stability. The fatigue cracks initiate predominantly on the free surface of fatigue specimens and propagate in an intergranular mode or a mixed transgranular and intergranular mode.

• Periodical: Applied Mechanics and Materials (Volume 618)
• Pages: 120-124
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.618.120
• Online since: August 2014
• Authors: Yuan Yuan Wang*, Bao Sen Wang, Li Jia Chen
• Keywords: Cyclic Stress Response, Failure Mode, High Temperature Low Cycle Fatigue, Nickel Base Superalloy, Welding Joint

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