Effect of pre-strain on oxidation behaviour of nickel-based superalloys in air at 700 °C. (15th May 2022)

• Record Type: Journal Article
• Authors: Lee, Cheol Min; Han, Young-Soo; Jeong, Jae Suk; Jung, Woo Sang; Song, Seok Hyun; Kim, Ju-Seong
• Is Part Of: Corrosion science. Volume 200(2022)
• Publication Date: 2022-05-15
• Subjects: A. nickel -- A. alloy -- B. SEM -- B. TEM -- B. XRD -- C. high temperature corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110229
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The effect of pre-strain on oxidation behaviour of nickel-based superalloys was analysed using alloys 263 and 740H. Both alloys were subjected to tensile tests followed by oxidation tests at 700 °C in air. At higher pre-strain, both alloys exhibited higher oxidation rates and more oxide spallation. Microstructures were examined using various techniques (XRD, SEM, EBSD, and TEM). It was found that the pre-strain accelerated the formation of internal oxides. The defects that formed during the tensile tests apparently acted as oxygen diffusion channels from the oxide/metal interface to the inside of the metal substrate. Graphical Abstract: ga1 Highlights: Effect of pre-strain on oxidation behaviour of Ni-based superalloys was analysed. The oxidation resistance decreased with increasing pre-strain. The microstructures were examined in detail using XRD, SEM, EBSD, and TEM.