Aging phenomena in high-Si steels studied by internal friction

Si-steels with various Si-contents (1.9–5.6 wt.%) have been analyzed by internal friction and compared with an ultra-low carbon steel. Measurements have been carried out immediately after different thermomechanical treatments to study a believed aging phenomenon. Adding Si lowers the Snoek peak of c...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2006-12, Vol.442 (1), p.462-465
Main Authors: Ruiz, D., Rivera-Tovar, J.L., Segers, D., Vandenberghe, R.E., Houbaert, Y.
Format: Article
Language:English
Subjects:
Aging phenomena
Applied sciences
Exact sciences and technology
Internal friction
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Other mechanical properties
Short-range order
Si-steels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Si-steels with various Si-contents (1.9–5.6 wt.%) have been analyzed by internal friction and compared with an ultra-low carbon steel. Measurements have been carried out immediately after different thermomechanical treatments to study a believed aging phenomenon. Adding Si lowers the Snoek peak of carbon and produces a new peak associated to the formation of Si–C pairs. For Si contents higher than 4.6 wt.%, another peak appears at very low frequencies, which can be attributed to a Zener relaxation of Si-atom pairs. A room-temperature aging effect has been detected in the Si-steels, but not in the ultra-low carbon steel. This aging is caused by the migration of C atoms to the structural defects and by formation of short-range order in the Fe–Si solution.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2006.05.164