Destructive and non-destructive testing methods for characterization and detection of machining-induced white layer: A review paper. (November 2018)

• Record Type: Journal Article
• Authors: Brown, M.; Wright, D.; M'Saoubi, R.; McGourlay, J.; Wallis, M.; Mantle, A.; Crawforth, P.; Ghadbeigi, H.
• Is Part Of: CIRP journal of manufacturing science and technology. Volume 23(2018)
• Page Start: 39
• Page End: 53
• Publication Date: 2018-11
• Subjects: White layer -- Surface integrity -- Non-destructive testing -- Machining -- Gas turbine materials; Manufacturing processes -- Periodicals; 670.5
• DOI: 10.1016/j.cirpj.2018.10.001
• Languages: English
• ISSNs: 1755-5817

Abstract

Abstract: The presence of machining-induced white layer in the near-surface of critical aeroengine alloys has a detrimental effect on the lifetime of a component. Present techniques for identifying and characterizing white layer, such as optical microscopy and hardness testing, whilst effective, are destructive, costly and time-consuming. Non-destructive testing methods may, therefore, offer improvements to the process of white layer detection. This paper discusses the formation mechanisms and the defining physical properties of machining-induced white layers before offering a comprehensive review of the current state-of-the-art in both destructive and non-destructive testing methods for detecting this anomalous surface feature.