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2018 | OriginalPaper | Chapter

The Role of Stoichiometry on Ordering Phase Transformations in Ni–Cr Alloys for Nuclear Applications

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Mechanical property degradation due to isothermal ageing is of potential concern for alloys based on the Ni–Cr binary system, such as Alloys 625 and 690. The disorder-order phase transformation, which is the primary source of embrittlement, has been studied in Ni–Cr model alloys by experimental approaches. Model alloys with different stoichiometries have been isothermally aged up to 5000 h at three temperatures (373, 418, and 475 °C) and characterized via nano-indentation, atom probe tomography, and transmission electron microscopy. Results show that off-stoichiometry alloys exhibit ordering but at a slower rate than stoichiometric (Ni/Cr = 2.0) alloy.

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Metadata
Title
The Role of Stoichiometry on Ordering Phase Transformations in Ni–Cr Alloys for Nuclear Applications
Copyright Year
2018
DOI
https://doi.org/10.1007/978-3-319-67244-1_16

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