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Grain boundary character distribution in an additively manufactured austenitic stainless steel

Version 2 2024-06-06, 08:01
Version 1 2020-10-29, 12:04
journal contribution
posted on 2024-06-06, 08:01 authored by Majid Laleh, Anthony E Hughes, Mike Yongjun TanMike Yongjun Tan, Gregory S Rohrer, Sophie Primig, Nima Haghdadi
The grain boundary character distribution (GBCD) in an austenitic stainless steel produced by additive manufacturing (AM) in both as-built and annealed conditions was studied. Relatively fine grains and a non-fibre texture was achieved by AM, and as-built structure showed a high population of Σ3 boundaries. A five-parameter GBCD analysis revealed that the microstructure is mostly dominated by highly incoherent Σ3 boundaries. The grain boundary network also consisted of random high angle, coherent Σ3s terminating on (111) planes with a pure twist character, and tilt Σ9 boundaries. The findings show prospects for the possibility of engineering the grain boundary network of materials in-situ, via the stress and heat induced by the thermal cycles during AM.

History

Journal

Scripta Materialia

Volume

192

Pagination

115-119

Location

Oxford, Eng.

ISSN

1359-6462

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2020, Acta Materialia

Publisher

Elsevier