The low-cycle fatigue deformation mechanisms of two single crystal superalloys at room temperature and 600 °C. (October 2019)

• Record Type: Journal Article
• Authors: Zhang, Yaoli; Wang, Xinguang; Li, Jinguo; Cheng, Yin; Yang, Yanhong; Meng, Jie; Liu, Jinlai; Liu, Jide; Zhou, Yizhou; Sun, Xiaofeng
• Is Part Of: Scripta materialia. Number 171(2019)
• Page Start: 122
• Page End: 125
• Publication Date: 2019-10
• Subjects: Low-cycle fatigue -- Slip band -- Ruthenium element -- Single crystal superalloy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.06.033
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The LCF behaviors of two Ni-based single-crystal superalloys at room temperature and 600 °C have been studied. Superalloy with 3 wt% Ru-containing (3Ru alloy) had more excellent fatigue performances than that of non-Ru superalloy (0Ru alloy). Microstructures observed by transmission electron microscope showed that 0Ru alloy exhibited slip bands with orthogonal slip directions after the test. (1ī1) [011] and (1ī1) [0ī1] slip systems were activated in plastic deformation process. While (111) [0ī1] and (1ī1) [0ī1] slip systems of 3Ru alloy were along the single slip direction. Therefore, adding alloying element Ru to the superalloy promoted uniform deformation and prolonged fatigue life. Graphical abstract: Unlabelled Image