Dependence of stacking faults in gamma matrix on low-cycle fatigue behavior of a Ni-based single-crystal superalloy at elevated temperature. (15th July 2018)

• Record Type: Journal Article
• Authors: Wang, X.G.; Liu, J.L.; Liu, J.D.; Zhou, Y.Z.; Li, J.G.; Sun, X.F.; Do, J.H.; Choi, B.G.; Kim, I.S.; Jo, C.Y.
• Is Part Of: Scripta materialia. Number 152(2018)
• Page Start: 94
• Page End: 97
• Publication Date: 2018-07-15
• Subjects: Single-crystal superalloy -- LCF behavior -- Deformation mechanism -- Stacking faults; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.04.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The LCF behavior of a fourth-generation Ni-based single-crystal superalloy at elevated temperature with different total strain amplitudes has been studied. Notably, the experimental alloy demonstrated a significant work hardening behavior with the total strain amplitude increasing. A great number of SFs with different configurations in the γ matrix was observed. The nature of work hardening was conclusively shown to be dependent upon the high density of SFs and Lomer-Cottrell dislocations in the γ matrix, which is rarely reported previously. This finding reported in this work provides us a new idea on high performance single-crystal superalloy design. Graphical abstract: Unlabelled Image