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首页> 外文期刊>Materials Science and Engineering >Macrosegregation induced interface structure and its effect on creep failure in dissimilar metal welds between Ni-based alloy and 10% Cr martensitic steel
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Macrosegregation induced interface structure and its effect on creep failure in dissimilar metal welds between Ni-based alloy and 10% Cr martensitic steel

机译：宏观调度诱导界面结构及其对镍基合金与10％Cr马氏体钢不同金属焊缝蠕变失效的影响

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摘要

This study reported the evolutionary behavior of macrosegregation induced interface structure during post weld heat treatment (PWHT) and its effect on creep failure in dissimilar metal welds (DMWs) between Ni-based alloy and 10%Cr martensitic steel with Ni-based filler metal. During welding, macrosegregation led to formation of partially mixed beach-like lath martensite interface structure on the steel side. The beach-like structure transformed to rod-like Ni-rich and C-rich martensite accompanied by Ni-depleted and C-depleted martensite/ferrite after PWHT due to partial austenization and diffusion of austenite-stabilizing elements like Ni and C. Interfacial creep failure occurred along the interface between steel and the beach-like interface structure, which was related to creep voids nucleation at the BCC/FCC interface between steel and the beach-like structure during creep at 600 °C. Hence, the relationship between macrosegregation, interface structure and creep failure in the DMWs was clarified.
机译：本研究报道了焊接焊接热处理（PWHT）期间Macrosegration诱导界面结构的进化行为及其对Ni基合金与10％Cr马氏体钢的不同金属焊接（DMWs）的蠕变失效的影响。在焊接期间，MacroseGregation导致在钢侧形成部分混合的海滩状Lath Martensite界面结构。由于邻近奥氏体稳定元素（如Ni和C.界面蠕变）的部分奥氏体化和扩散后，海滩状结构转化为棒状Ni的富含Ni和C富含马氏体/铁素体。钢铁与海滩状界面结构之间的界面发生故障，这与钢的BCC / FCC接口蠕变和海滩状结构在600°C的蠕变期间的蠕变空隙。因此，澄清了DMWS中宏观测定，接口结构和蠕变失败之间的关系。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|141847.1-141847.8|共8页
  • 作者

    Yu Zhang; Zhipeng Cai; Chaoyu Han; Xin Huo; Manjie Fan; Kejian Li; Jiluan Pan;

  • 作者单位

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materiak Processing Technology Ministry of Education Beijing 100084 China;

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materiak Processing Technology Ministry of Education Beijing 100084 China State Key Laboratory of Tribology Tsinghua University Beijing 100084 China Collaborative Innovation Center of Advanced Nuclear Energy Technology Tsinghua University Beijing 100084 China;

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materiak Processing Technology Ministry of Education Beijing 100084 China;

    Shanghai Turbine Plant of Shanghai Electric Power Generation Equipment Co. Ltd Shanghai 200240 China;

    Shanghai Turbine Plant of Shanghai Electric Power Generation Equipment Co. Ltd Shanghai 200240 China;

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materiak Processing Technology Ministry of Education Beijing 100084 China;

    Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materiak Processing Technology Ministry of Education Beijing 100084 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Dissimilar metal weld; Macrosegregation; Interface structure; Phase transformation; Creep failure;

    机译：不同的金属焊接;宏指令格;界面结构;相变;蠕变失败;

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