Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9796116 | Materials Science and Engineering: A | 2005 | 4 Pages |
Abstract
Martensitic steels are known for their softening during cyclic tests carried out at high temperature. The softening has been at least partially explained by lath and sub-grain boundary elimination. This article is dedicated to an attempt at modelling both phenomena. Thanks to mechanical tests it is shown that the softening is mainly due to a decrease of the backstress. Transmission electron microscopy allows us to propose a mechanism of low-angle boundary elimination. Annihilation between dislocations of low-angle boundaries and incident mobile dislocations is modelled. The macroscopic backstress is finally computed using a Hall-Petch law and the Taylor model.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Maxime Sauzay, Hélène Brillet, Isabelle Monnet, Michel Mottot, Françoise Barcelo, Benjamin Fournier, André Pineau,