Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1501721 | Scripta Materialia | 2008 | 4 Pages |
Abstract
An unusual low-temperature structural transformation from ferrite (α) to austenite (γ) is observed near room temperature through surface mechanical attrition treatment (SMAT) by means of transmission electron microscopy (TEM) and back-scattering Mössbauer spectroscopy (BSMS). Associated with the thermodynamic calculation, two factors that lead to the appearance of austenite after SMAT near room temperature are discussed. One factor is the formation of supersaturated nanocrystalline ferrite. The other is the compression stress at the boundaries of nano-size grains after SMAT.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Na Min, Wei Li, Xuejun Jin,