Journal
MATERIALS LETTERS
Volume 233, Issue -, Pages 16-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.08.141
Keywords
Metals and alloys; Aging; Nitrides; Precipitation; Lattice orientation; Interfaces
Funding
- National Natural Science Foundation of China [51474156, U1660201]
- National Magnetic Confinement Fusion Energy Research Program [2015GB119001]
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Precipitation behavior of Z-phase (NbCrN) is investigated in 25Cr-20Ni-Nb-N austenitic stainless steel during long-term aging. The early precipitation of secondary NbN appears when the steel is aged for 100 h, and the secondary NbCrN precipitates adhere to the pre-existing NbN particles during the subsequent aging. A semi-coherent relation between (1 1 1)(NbN) and (1 1 2)(NbCrN) is identified, which provides favorable sites for the nucleation of secondary NbCrN on secondary NbN. Subsequently, secondary NbN will dissolve to supply niobium and nitrogen for the growth of secondary NbCrN. (C) 2018 Elsevier B.V. All rights reserved.
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