Probing single crystal orientation by X-ray diffraction for nickel-based superalloys

• Published in: Results in physics Vol. 29; p. 104769
• Main Authors: Wang, Yumin, Liu, Zhongli, Qiao, Liang, Li, Shuangming
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2021; Elsevier
• Subjects: Directional solidification; Orientation; Single crystal superalloy; X-ray diffraction; X-ray diffraction; Single crystal superalloy; Directional solidification; Orientation
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2021.104769

•Effects of cutting direction and blade shape on deviation angle are discussed.•RO-XRD and BRL-XRD could give a precise primary orientation angle for the blade.•Two pairs of diffraction peaks developed in single crystal is explained. The deviation angles of Ni-based single crystal superalloys are investigated by two techniques of rotating orientation X-ray diffraction (RO-XRD) and back-reflection Laue X-ray diffraction (BRL-XRD). The remarkable agreement between the RO-XRD and BRL-XRD methods provides strong evidence that the cutting direction has a significant effect on the deviation angle. Regardless of the deviation angle, the primary orientation angle is presented to characterize the inherent orientation changes in Ni-based single crystal superalloy, and it eliminates the effects of cutting direction. Furthermore, two pairs of diffraction peaks of the RO-XRD pattern could be developed in Ni-based single crystal superalloy, although these peaks are generally considered to take place in a bicrystal.