Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 32, Issue 3, Pages 265-270Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2015.11.010
Keywords
Nickel superalloy; Grain boundaries; Boride; Crystal structure; Intergrowth; Orientation relationship
Funding
- High Technology Research and Development Program of China [2014AA041701]
- National Natural Science Foundation of China [51171179, 51271174, 51331005, 11332010]
- China Postdoctoral Science Foundation [2015M580923]
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The grain boundary microstructures of a heat-treated Ni-based cast superalloy IN792 were investigated. The results show that M5B3 boride precipitates at the grain boundary. A special orientation relationship between M5B3 phase and the matrix at one side of the grain boundary is found. At the same time, two M5B3 borides with different orientations could co-exist in a single M5B3 particle as an intergrowth besides existing alone, thus forming orientation relationship between the two M5B3 phases and matrix. This phenomenon could be attributed to the special orientation relationship between M5B3 phase and the matrix. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
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