Grain size refinement, texture analysis and effect on the tensile properties of a novel Inconel 718

• Published in: Materials letters 2021-06, Vol.292, p.129633, Article 129633
• Main Authors: Thulasiram, Ramkumar, Mani, Selvakumar, Ramaswamy, Narayanan, Murugesan, Mohanraj
• Format: Article
• Language: English
• Subjects: Crystallography; Distribution functions; Grain boundaries; Grain refinement; Grain size; Heat treating; Heat treatment; High temperature; Materials science; Metal forming and shaping; Nickel base alloys; Superalloys; Tensile properties; Tensile tests; Texture
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.129633

•800 °C heat treated Inconel 718 exhibited better phase revision about 9.5 µm.•In 800 °C Inconel 718, the tensile strength decreased from 600 Mpa to 450 Mpa.•In 800 °C heat treated Inconel 718, providing for better ductility and formability. Performance of elevated temperature grain refinement and texture analysis are investigated in the temperature range of 500 °C, 600 °C, 700 °C and 800 °C in this study. Electron Back Scattered Diffraction (EBSD) was used for observation of grain distribution of Inconel 718. Tensile test was performed for all the heat treated samples and the fractrographic was examined using Scanning Electron Microscope (SEM). In addition, the texture of Inconel 718 was examined using crystallographic textures and Orientation Distribution Function (ODF) plots. The results indicate that Inconel 718 heat treated with 800 °C shows better grain refinement and provide optimum texture. Furthermore, it also indicated that decreased grain size contributed to the decreased cleavage size that leads to increased ductility.