A New Approach to Calculate the γ Orientation Maps in Steels

Autor: Lionel Germain, Pierre Blaineau, Nathalie Gey, Michel Humbert
Rok vydání: 2010
Předmět:
Zdroj: Solid State Phenomena. 160:203-210
ISSN: 1662-9779
DOI: 10.4028/www.scientific.net/ssp.160.203
Popis: We propose a new approach to automatically reconstruct the  orientation map from the ’ map inherited by the bainitic or martensitic ’ phase transformation. Our model comprises two main steps (1) identification of reliable fractions of parent grains – each  fraction orientation is determined from neighbouring variants related to a unique  orientation with a low tolerance angle; (2) expansion of these fractions by collecting adjacent variants being in orientation relation (OR) with the  orientation of the initial fraction - using now a higher tolerance around the strict OR. The code was tested on ’ maps we built from reference  maps to control some characteristics of the transformation, i.e. the type of OR used, the spread around OR, the number of inherited variants. The results show that even with a large spread around OR, the shape and orientation of most of the  grains are accurately calculated.
Databáze: OpenAIRE