Variable temperature micropillar compression to reveal basal slip properties of Zircaloy-4

SCRIPTA MATERIALIA

卷:162

Article

Wang, Siyang¹  Giuliani, Finn¹  Ben Britton, T.¹ 

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

关键词: Zirconium;    Critical resolved shear stress;    Micropillar compression;    Elevated temperature;   

DOI  :  10.1016/j.scriptamat.2018.12.014

来源: Elsevier

【 摘 要 】

Zircaloy-4 is widely used as nuclear fuel cladding materials, where it is important to understand the mechanical properties between room temperature and reactor operating temperatures (around 623 K). To aid in this understanding, we have performed compression tests on micropillars aligned to activate basal slip across this temperature range. Engineering analysis of the results indicates that the plastic yield follows a thermally activated constitutive law. We also observe the nature of the slip bands formed on the side surface of our pillars and see characteristic 'bulging' that tends to localise as temperature increases. (C) 2018 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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