Cracking Driving Force at the Tip of SCC under Heterogeneous Material Mechanics Model of Safe-End Dissimilar Metal-Welded Joints in PWR

IF 1 4区工程技术 Q3 NUCLEAR SCIENCE & TECHNOLOGY

Science and Technology of Nuclear Installations Pub Date : 2022-01-13 DOI:10.1155/2022/6605101

Yuman Sun, H. Xue, K. Zhao, Yubiao Zhang, Y. Zhao, W. Yan, R. Bashir

引用次数: 0

Abstract

The complicated driving force at the stress corrosion cracking (SCC) tip of the safe-end dissimilar metal-welded joints (DMWJs) in the pressurized water reactor (PWR) is mainly caused by the heterogeneous material mechanical properties. In this research, to accurately evaluate the crack driving force at the SCC in DMWJs, the stress-strain condition, stress triaxiality, and J-integral of the crack tip at different positions are analyzed based on the heterogeneous material properties model. The results indicate that the larger driving force will be provided for the I-type crack when the crack is in the SA508 zone and the interface between the 316L region and base metal. In addition, the heterogeneous material properties inhibit the J-integral of the crack in the 316L region, which has a promoting effect when the crack is in the SA508 zone and weld metal. It provides a new idea for analyzing driving force at the crack tip and safety evaluation of DMWJs in PWRs.

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压水堆安全端异种金属焊接接头非均质材料力学模型下SCC尖端裂纹驱动力

压水堆安全端异种金属焊接接头(DMWJs)尖端应力腐蚀开裂(SCC)的复杂驱动力主要是由材料力学性能的不均匀性引起的。本研究基于非均质材料特性模型，分析了裂纹尖端不同位置的应力-应变状态、应力三轴性和j积分，以准确评价DMWJs中SCC处的裂纹驱动力。结果表明:当裂纹位于SA508区和316L区与母材交界面处时，对i型裂纹的驱动力较大;此外，非均质材料性能抑制了316L区裂纹的j积分，而当裂纹位于SA508区和焊缝金属时，j积分有促进作用。为压水堆裂纹尖端驱动力分析和安全性评价提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science and Technology of Nuclear Installations NUCLEAR SCIENCE & TECHNOLOGY-

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Science and Technology of Nuclear Installations is an international scientific journal that aims to make available knowledge on issues related to the nuclear industry and to promote development in the area of nuclear sciences and technologies. The endeavor associated with the establishment and the growth of the journal is expected to lend support to the renaissance of nuclear technology in the world and especially in those countries where nuclear programs have not yet been developed.