The effect of cooling rate and grain size on hydride microstructure in Zircaloy-4

JOURNAL OF NUCLEAR MATERIALS

卷:513

Article

Birch, Ruth¹  Wang, Siyang¹  Tong, Vivian S.¹  Britton, T. Benjamin¹ 

[1] Imperial Coll, Dept Mat, London SW7 2AZ, England

关键词: Zirconium hydride;    Microstructure;    Nuclear fuel cladding;    Zirconium;   

DOI  :  10.1016/j.jnucmat.2018.11.011

来源: Elsevier

【 摘 要 】

We explore the distribution, morphology and structure of zirconium hydrides formed using different cooling rates through the solid state Zr+[H] -> Zr + hydride transus, in fine and blocky alpha Zircaloy-4. We observe that cooling rate and grain size control the phase and distribution of hydrides formed. The blocky alpha (coarse grain, > 200 mu m) Zircaloy-4, has a smaller grain boundary area to grain volume ratio and this significantly affects nucleation and growth of hydrides as compared to fine grain size (similar to 11 mu m) material. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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