Austenite grain abnormal growth in the microalloyed steel 38MnSiV55 and determination of driving and pinning forces
Keywords:Abnormal grain growth, Precipitate size distribution, Pinning forces, Driving forces
Several castings of 38MnSiVS5 steel have been manufactured with different titanium and aluminium contents and the austenitic grain size has been determined at temperatures between 900 and 1200 °C. The volume fraction of normal and abnormal grain growth have been quantified. The results show that abnormal growth of the austenitic grain occurs irrespective of the titanium and aluminium contents, due fundamentally to the partial dissolution of TiN precipitates. The steels with high aluminium contents have presented worse behaviour due to the formation of a second type of precipitates, namely AIN, which quickly dissolve between 1000 and 1100 °C, causing a drastic decline in the local pinning forces which gives rise to more pronounced abnormal growth of the affected grains. In parallel, a study of the precipitates has been carried out by transmission and scanning microscopy, allowing the calculation of pinning forces according to Zener and Gladman expressions and the establishment of a comparison with driving forces. This comparison makes it possible to explain the differences encountered between the different castings.
Download data is not yet available.
How to Cite
Medina, S. F., Chapa, M., Gómez, M., Quispe, A., López, V., & Fernández, B. (2003). Austenite grain abnormal growth in the microalloyed steel 38MnSiV55 and determination of driving and pinning forces. Revista De Metalurgia, 39(6), 408–417. https://doi.org/10.3989/revmetalm.2003.v39.i6.355
Copyright (c) 2003 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.