Microstructure and tensile behavior of powder metallurgy FeCrAl accident tolerant fuel cladding

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外文摘要：© 2022 The Author(s)Defect-free seamless FeCrAl cladding tubes with 0.3 mm wall thickness have been successfully developed via full-scale powder metallurgy (PM) manufacturing routes, providing a cost neutral replacement of Zircaloy-2 tubes with enhanced accident tolerant fuel. Microstructure and tensile properties at room temperature and 315 °C were evaluated in the tubing of two yttrium-free FeCrAl alloy compositions PM-C26M and Ferritic Alloy – Sandvik Material Technology (FA-SMT) that differ in Cr, Al, Mo and minor addition of refractory elements. The powder metallurgy FeCrAl tubes reveal finer grain size than the smallest achievable grain size by cast/wrought tube fabrication process, low retained strain, and tensile properties superior to Zircaloy-2 cladding tubes. <101> fiber texture along the tube axial direction was observed. In-situ neutron diffraction during tensile loading shows qualitatively similar trend of intergranular load transfer during elastoplastic deformation in PM-C26M and FA-SMT, while FA-SMT indicates higher dislocation density and PM-C26M reveals more intensive <101> texture evolution along loading direction. Precipitates in FA-SMT are inferred to share load from the matrix, while such load sharing is not evident in PM-C26M. Compared to texture free ferritic steel data in the literature, the <101> fiber texture in the FeCrAl tubes seems to have little effect on the grain-level tensile deformation behavior including elastic anisotropy and plastic anisotropy.

外文关键词：

Accident tolerant fuel claddingFeCrAlMicrostructureNeutron diffractionPowder metallurgyTensile

作者：

Dolley E.、Crawford C.、Othon M.A.、Spinelli I.、Knussman M.P.、Rebak R.B.、An K.、Yu D.、Huang S.

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作者单位：

GE Research

Oak Ridge National Laboratory

出版年：

2022

DOI：

10.1016/j.jnucmat.2022.153524

Journal of Nuclear Materials

EISCI

ISSN：0022-3115

年,卷(期)：2022.560

参考文献量27