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Texture evolution in stainless steel processed by selective laser melting and annealing

Abstract

This work analyses the texture and microstructure gradients emerging in a 316L stainless steel processed by selective laser melting, using an island scan strategy, followed by annealing. Laser processing leads to the alignment of different crystallographic directions with the build direction at the mid and top layers, as well as to gradual structural coarsening. Annealing triggers discontinuous recrystallisation at highly strained regions, such as grain boundaries and laser track centre lines, resulting in the onset of new texture gradients. The development of the mentioned texture gradients is rationalised based on a competition between thermal gradient-driven growth and epitaxial growth.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 237900

Language

English

Author(s)

  • Omar Fergani
  • Vegard Brøtan
  • markus bambach
  • Maria Teresa Pérez-Prado

Affiliation

  • Siemens AG
  • SINTEF Manufacturing
  • Brandenburg Technical University Cottbus-Senftenberg
  • Spain

Year

2018

Published in

Materials Science and Technology

ISSN

0267-0836

Publisher

Taylor & Francis

Volume

34

Issue

18

Page(s)

2223 - 2230

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