Residual stress in a laser welded EUROFER blanket module assembly using non-destructive neutron diffraction techniques
Residual stress in a laser welded EUROFER blanket module assembly using non-destructive neutron diffraction techniques
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DOI：
10.1016/j.fusengdes.2013.12.041
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发表时间：
2014-02-01
影响因子：
1.7
通讯作者：
Heeley, E. L.
中科院分区：
文献类型：
--
作者：
Hughes, D. J.;Koukovini-Platia, E.;Heeley, E. L.
虽然可以使用有限元软件预测毯子模块焊接接头的结构完整性和寿命考虑因素，但必须证明这些模拟的有效性。本文首次对带有整体冷却通道的激光焊接样品中的残余应力状态进行了详细分析。采用最先进的非破坏性中子衍射来确定三轴应力状态并了解热影响区周围的微观结构变化。同步加速器 X 射线衍射用于探测焊接区周围无应变晶格参考参数的变化，从而可以校正中子测量。本文详细介绍了验证复杂安全关键反应堆组件中预测应力的重要实验途径，以供未来应用。 (C) 2014 Elsevier B.V. 保留所有权利。
Whilst the structural integrity and lifetime considerations in welded joints for blanket modules can be predicted using finite element software, it is essential to prove the validity of these simulations. This paper provides detailed analysis for the first time, of the residual stress state in a laser-welded sample with integral cooling channels. State-of-the-art non-destructive neutron diffraction was employed to determine the triaxial stress state and to understand microstructural changes around the heat affected zone. Synchrotron X-ray diffraction was used to probe the variation of strain-free lattice reference parameter around the weld zone allowing correction of the neutron measurements. This paper details an important experimental route to validation of predicted stresses in complex safety-critical reactor components for future applications. (C) 2014 Elsevier B.V. All rights reserved.