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首页> 外文期刊>Journal of Materials Engineering and Performance >Dissimilar Joining of Zircaloy-4 to Type 304L Stainless Steel by Friction Welding Process
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Dissimilar Joining of Zircaloy-4 to Type 304L Stainless Steel by Friction Welding Process

机译：摩擦焊接法将Zircaloy-4与304L不锈钢异种连接

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摘要

Zirconium- and titanium-based dissolver vessels containing highly radioactive and concentrated corrosive nitric acid solution needs to be joined to the rest of fuel reprocessing plant made of AISI type 304L stainless steel (SS), which demands high integrity and corrosion resistant dissimilar joints. Solid-state joining process of friction welding was proposed in the present work to join zircaloy-4 and type 304L SS since fusion welding processes produce brittle intermetallic precipitates at the interface which reduce the mechanical strength as well as the corrosion resistance of the joint. The present study attempts to optimize joining parameters, without and with thin Ta and Ni interlayers that can prevent brittle intermetallic formation. Tensile test, three-point bend test, and microhardness measurements were performed on the joints. Characterization techniques such as optical microscopy, scanning electron microscopy (SEM), and x-ray diffraction (XRD) were employed. A good friction weld joint of zircaloy-4 to 304L SS was achieved with the joint strength (~540 MPa) greater than that of the base of zircaloy-4, without using any interlayer. A bend ductility of 5° was only obtained without using any interlayer. However, XRD patterns indicated the presence of intermetallics in the friction-welded joints without interlayers. Corrosion test carried out on zircaloy-4 to 304L SS friction joint in boiling 11.5 M nitric acid exhibited corrosion rate of 225 μm/year after 240 h. SEM examination of the corroded joint indicated severe intergranular corrosion attack over stainless steel and preferential dissolution at the interface.
机译：需要将含有高放射性和浓腐蚀性硝酸溶液的锆和钛基溶解器容器与AISI 304L不锈钢（SS）制成的燃料后处理厂的其余部分连接，这需要高完整性和耐腐蚀的异种接头。在本工作中，提出了将Zircaloy-4和304L SS型连接起来的摩擦焊接的固态连接工艺，因为熔融焊接工艺会在界面处产生脆性的金属间沉淀，从而降低了机械强度以及接头的耐腐蚀性。本研究试图在没有和有薄的Ta和Ni中间层的情况下优化连接参数，可以防止脆性金属间化合物的形成。对接头进行了拉伸试验，三点弯曲试验和显微硬度测量。使用了诸如光学显微镜，扫描电子显微镜（SEM）和X射线衍射（XRD）的表征技术。在不使用任何夹层的情况下，Zircaloy-4与304L SS形成了良好的摩擦焊接接头，其接头强度（〜540 MPa）大于Zircaloy-4的基部。在不使用任何中间层的情况下，仅获得了5°的弯曲延展性。但是，XRD图谱表明在无中间层的摩擦焊接接头中存在金属间化合物。在沸腾的11.5 M硝酸中对Zircaloy-4至304L SS摩擦接头进行的腐蚀试验显示240小时后腐蚀速率为225μm/年。腐蚀接头的SEM检查表明，与不锈钢相比，晶界腐蚀严重，并且在界面处优先溶解。

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  • 来源
    《Journal of Materials Engineering and Performance》 |2009年第9期|1272-1279|共8页
  • 作者

    A. Ravi Shankar; S. Suresh Babu; Mohammed Ashfaq; U. Kamachi Mudali; K. Prasad Rao; N. Saibaba; Baldev Raj;

  • 作者单位

    Corrosion Science and Technology Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Department of Metallurgical Engineering P.S.G. College of Technology Coimbatore 641 004 India;

    Department of Metallurgical and Materials Engineering NIT Tiruchirappalli 620015 India;

    Corrosion Science and Technology Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Department of Metallurgical Engineering IIT Madras Chennai 600 020 India;

    Nuclear Fuel Complex Hyderabad 500 062 India;

    Corrosion Science and Technology Division Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    corrosion testing; joining; stainless steels; zircaloy-4;

    机译：腐蚀测试;连接;不锈钢;锆合金4;

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