Divergent grain boundary oxidation mechanisms in Inconel 718 with pre-tensile and pre-compressive strain state by bending

Journal of Materials Research and Technology 2026 Open access

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Authors: Weiyi Wu, Xueqiao Li, Mingzhe Liu, Xiaojia Wei, Yunsong Zhao, Yanhui Chen, Liwei Cao, Hui Lu, Ang Li, Lihua Wang
DOI: 10.1016/j.jmrt.2026.01.105
Cited by: 1
References: 43

Abstract

Thermo-mechanical coupling during service induces distinct oxidation behavior in Inconel 718 superalloys. This study systematically examines the oxidation response under pre-tension and pre-compression strains, focusing on microstructural evolution and stress-type-dependent mechanisms. Results reveal that tensile strain suppresses oxidation via accelerated Cr outward diffusion forming protective Cr 2 O 3 , which reduces oxidation rate. While compressive strain promotes oxidation through void-enhanced oxygen penetration. These findings provide critical insights for designing oxidation-resistant superalloys under coupled stress environments.

Fields of Study & Subjects

High Temperature Alloys and Creep High-Temperature Coating Behaviors Additive Manufacturing Materials and Processes

Publication details

Journal / source
Journal of Materials Research and Technology
Publisher
Elsevier BV
Volume
41
Pages
1514–1524
Publication date
15 January 2026
Language
EN