Journal
MATERIALS LETTERS
Volume 234, Issue -, Pages 201-204Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.09.111
Keywords
316 stainless steel; Grain boundary engineering; Microstructure; Grain boundaries; Twin boundary chain
Funding
- National Natural Science Foundation of China [51701017, 51671122]
- Beijing Municipal Natural Science Foundation [2182044]
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A new thermomechanical processing of warm rolling by a low deformation followed by annealing, which was specially developed for grain boundary (GB) engineering of large-size materials, was performed on a large-size 316 stainless steel. To examine usefulness of the thermomechanical process, the GB-networks before and after this process were quantitatively compared, and intergranular attack susceptibility was measured. Results clearly demonstrate that the GB-engineered 316 has higher proportions of coincidence site lattice boundaries, larger grain-clusters, longer twin boundary chains, and lower susceptibility to intergranular attack, indicating a successful process for GB-engineering. Additionally, a new parameter called twin boundary chain was proposed to evaluate the GB-network optimization. (C) 2018 Elsevier B.V. All rights reserved.
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