Solid-state welding for dissimilar zirconium alloy under joule heating effect: Material flowing behavior, characteristics, evolution and formation of interface

IF 2.8 2区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nuclear Materials Pub Date : 2024-07-14 DOI:10.1016/j.jnucmat.2024.155296

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引用次数: 0

Abstract

An in-depth understanding of the mechanism of ultra-fast forming in resistance upsetting welding is the key to obtain high-quality cladding tube-end plug joints. According to the movement characteristics of the end plug (Zr-Sn alloy) to the cladding tube (Zr-Nb alloy), the macroscopic interaction was further revealed. The flow behavior of materials at different welding times was tracked in detail, and the rapid expansion behavior of weld nugget was studied. The electron back scatter diffraction (EBSD) method was used to analyze the grain characteristics and forming mechanism of the weld nugget in different regions, and the spatial and temporal distribution characteristics of the forming mechanism of the joint were established. The forming process of the joint heavily relies on the joule heating effect occurring 8 ms before welding. The ultra-short duration of 20 ms enables the extremely rapid formation of the entire joint. The thermo-mechanically affected zone (TMAZ) gradually evolved from the initial five parts to two parts. The welding process will be accompanied by continuous deformation, multiple dynamic recrystallization (DRX) and grain growth. Despite the differing initial textures of the base metal in the end plug and the cladding tube, the texture characteristics of the fine grain zone (FCZ) after welding exhibit remarkable similarity. The joint exhibits extremely superior mechanical properties. Both tensile and blasting mechanical evaluation methods fractured the base material of the cladding tube.

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焦耳加热效应下异种锆合金的固态焊接：材料流动行为、特征、演变和界面形成

深入了解电阻镦焊超快成形的机理是获得高质量包覆管-端塞接头的关键。根据端塞（Zr-Sn 合金）与包覆管（Zr-Nb 合金）的运动特性，进一步揭示了宏观相互作用。详细跟踪了材料在不同焊接时间的流动行为，并研究了焊块的快速膨胀行为。采用电子背散射衍射（EBSD）方法分析了不同区域焊块的晶粒特征和成形机理，建立了接头成形机理的时空分布特征。焊点的成形过程主要依赖于焊前 8 毫秒的焦耳加热效应。20 毫秒的超短持续时间实现了整个接头的极速成型。热机械影响区（TMAZ）从最初的五个部分逐渐演变为两个部分。焊接过程将伴随持续变形、多次动态再结晶（DRX）和晶粒长大。尽管端塞和覆层管中母材的初始纹理不同，但焊接后细晶区（FCZ）的纹理特征却非常相似。接头的机械性能极为优异。拉伸和喷砂两种机械评估方法都能使堆焊管的母材断裂。

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

Journal of Nuclear Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

25.80%

发文量

601

审稿时长

63 days

期刊介绍： The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome. The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example. Topics covered by JNM Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior. Materials aspects of the entire fuel cycle. Materials aspects of the actinides and their compounds. Performance of nuclear waste materials; materials aspects of the immobilization of wastes. Fusion reactor materials, including first walls, blankets, insulators and magnets. Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties. Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.

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