About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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Tackling Metallic Structural Materials Challenges for Advanced Nuclear Reactors
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Presentation Title |
Degradational Effects of Single Crystal Deformation Mode and Corrosion Resistance due to Long-Range Order in Ni-Based Alloys for Nuclear Applications |
Author(s) |
Fei Teng, Julie Tucker, Trishelle Copeland-Johnson , Guoping Cao, Hi Tin Vo, Nicholas Aerne |
On-Site Speaker (Planned) |
Fei Teng |
Abstract Scope |
Long-range ordering (LRO) structural transformations have been studied in model and commercial Ni-based alloys affected by irradiation or thermal ageing. For nuclear applications, it is important to understand the compounding degradational effects of LRO in the Ni-based reactor structural components. This presentation will provide a brief summary of our recent studies that have investigated the role of Ni-Cr stoichiometry in ordering transformation, role of LRO in single crystal deformation and corrosion resistance through in-situ scanning electron microscopy micropillar compression and synchrotron x-ray diffraction. The studies revelated that LRO has the highest formation rate when Ni/Cr = 2 in the condition of isothermal heat treatment. LRO can also change the deformation mode from shearing to twinning in a single crystal and the ordering precipitates enhance the extent of molten salt corrosion in chloride systems. |