Hydrogen diffusion under stress in Zircaloy: High-resolution neutron radiography and finite element modeling

被引：22

作者：

Gong, Weijia ^{[1
]}

Trtik, Pavel ^{[2
]}

Valance, Stephane ^{[1
]}

Bertsch, Johannes ^{[1
]}

机构：

[1] Paul Scherrer Inst, Lab Nucl Mat, CH-5232 Villigen, Switzerland

[2] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 508卷

关键词：

Neutron radiography; Zirconium; Hydrogen; Stress-driven diffusion; X-RAY-DIFFRACTION; HYDRIDE PRECIPITATION KINETICS; PAUL SCHERRER INSTITUT; ZIRCONIUM; DISSOLUTION; MISFIT;

D O I：

10.1016/j.jnucmat.2018.05.079

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution neutron radiography (similar to 10 mu m) was utilized to quantify hydrogen diffusion under stress in Zircaloy nuclear fuel cladding materials. A notched Zircaloy-4 plate with similar to 600 wppm hydrogen underwent a thermo-mechanical test to allow hydrogen in solid solution to diffuse solely under a stress raiser. After the test, neutron radiography revealed an elevated concentration field at the notch, with a hydrogen gradient detectable over 700 mm and a maximum elevation of 130 wppm. Finite element computation was then performed by employing the Cauchy stress tensor and hydrogen-induced anisotropic transformation trains as the driving force of hydrogen diffusion. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：459 / 464

页数：6