Correlative Microscopy Approaches to Understand Interactions between Microstructure and Creep Cavitation in Type 316H Austenitic Stainless Steels

June 14, 2023

Siqi He (1), Ed Horton (1), Antonio Fernandez Caballero (2), Elsiddig Elmukashfi (2), Stacy Moore (1), Keith Hallam (1), David Knowles (1) (3), Peter Flewitt(1), and Tomas Martin(1)
15th international conference on fracture (June 11-16 2023). DOI:


Creep cavitation can significantly limit creep ductility and lifetime of energy materials at elevated temperatures. Although cavity growth mechanisms are well established, creep cavity initiation and early- stage growth need to be better understood. This study utilized a correlative microscopy approach together with image registration to study links between local microstructure and creep cavitation in a Type 316H austenitic stainless steel. This provides new insights into cavity initiation mechanisms.

How Our Software Was Used

Dragonfly was used to segment all creep cavities from the stitched higher resolution SEM image and exported as a binary image.

Author Affiliation

(1) University of Bristol, Bristol, UK
(2) University of Oxford, Oxford, UK
(3) Henry Royce Institute, Manchester, UK