We document that in unstressed, undeformed, samples of pure iron containing silica inclusions precipitated by melt deoxidation, the iron matrix and a small fraction of the silica inclusions are locally separated at room temperature by a void. Thermal cycling, picnometry, dilatometry, and nano-holotomography experiments are combined to demonstrate that those voids originate from silica inclusion/iron matrix interfacial debonding during cooldown from elevated processing temperatures, resulting from the volumetric expansion that accompanies the austenite-to-ferrite phase transformation.
Title
Phase Transformation-Induced Interfacial Debonding of Silica Inclusions in Iron
Published in
Metallurgical And Materials Transactions B-Process Metallurgy And Materials Processing Science
Volume
55
Issue
1
Pages
1-7
Date
2023-10-25
Publisher
Springer, New York
ISSN
1073-5615
1543-1916
Grant
This work was sponsored by the Swiss National Science Foundation (Grant No. 200021_182557). We also acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities (proposal MA-5725, beamline ID16B) and we would li: 200021_182557
Swiss National Science Foundation
Record creation date
2024-02-16