扩散焊接合金 800H 的高温力学性能

IF 2.6 3区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Jong-Bae Hwang, Injin Sa, Eung-Seon Kim, Dong-Hyun Lee
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引用次数: 0

摘要

研究了扩散焊接合金 800H 的高温机械性能,以制造用于高温反应器(HTR)系统的印刷电路热交换器(PCHE)。对合金 800H 进行了表面处理,使溶度积()超过反应商()。表面处理促进了晶界在界面上的迁移。在 760 °C以下,屈服强度超过了 ASME 第 III 章第 5 分部表 HBB-I-14.5 中描述的值,而在 700 °C以下,抗拉强度与表 HBB-3225-1 中描述的值相当。在 760 °C 时,抗拉强度比规范值低 30 MPa。应力-破裂值超过了表 HBB-I-14.6C 中描述的合金 800H 的预期最小应力-破裂值。通过拉伸试验获得的扩散焊接件的延展性与初始合金 800H 相当。同时,在应力-断裂测试期间,界面上形成的二次析出物降低了扩散焊接件的延展性,从而导致晶间断裂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High temperature mechanical properties of diffusion welded alloy 800H
High temperature mechanical properties of diffusion welded Alloy 800H was investigated to fabricate a printed circuit heat exchanger (PCHE) for high temperature reactor (HTR) systems. Surface treatment was performed on Alloy 800H to transform the solubility product () to exceed the reaction quotient (). The surface treatment facilitated the grain boundary migration across the interface. The yield strengths exceeded the values described in ASME Section III Division 5 Table HBB-I-14.5 up to 760 °C, while the tensile strengths were comparable to Table HBB-3225-1 up to 700 °C. At 760 °C, the tensile strength was ∼30 MPa lower than the code. The stress-to-rupture values exceeded the expected minimum stress-to-rupture values of Alloy 800H described in Table HBB-I-14.6C. The ductility of the diffusion weldment acquired from the tensile test was comparable to the as-received Alloy 800H. Meanwhile, the formation of the secondary precipitates on the interface during the stress-to-rupture test deteriorated the ductility of the diffusion weldment, which induced intergranular fracture.
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来源期刊
Nuclear Engineering and Technology
Nuclear Engineering and Technology 工程技术-核科学技术
CiteScore
4.80
自引率
7.40%
发文量
431
审稿时长
3.5 months
期刊介绍: Nuclear Engineering and Technology (NET), an international journal of the Korean Nuclear Society (KNS), publishes peer-reviewed papers on original research, ideas and developments in all areas of the field of nuclear science and technology. NET bimonthly publishes original articles, reviews, and technical notes. The journal is listed in the Science Citation Index Expanded (SCIE) of Thomson Reuters. NET covers all fields for peaceful utilization of nuclear energy and radiation as follows: 1) Reactor Physics 2) Thermal Hydraulics 3) Nuclear Safety 4) Nuclear I&C 5) Nuclear Physics, Fusion, and Laser Technology 6) Nuclear Fuel Cycle and Radioactive Waste Management 7) Nuclear Fuel and Reactor Materials 8) Radiation Application 9) Radiation Protection 10) Nuclear Structural Analysis and Plant Management & Maintenance 11) Nuclear Policy, Economics, and Human Resource Development
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