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Effects of thermal aging on microstructure and hardness of China low activation martensitic steel welded joint

机译:热时效对中国低活化马氏体钢焊接接头组织和硬度的影响

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摘要

The aim of this paper is to investigate the microstructure evolution and the change in hardness distribution of China low activation martensitic steel welded joints after thermal aging at 550 degrees C for 6000 h. The joint was processed by electron beam welding. Compared to the base metal (BM) and heat affected zone (HAZ), Laves-phase was not formed in weld metal (WM) in the as-aged condition due to the higher tantalum content and less precipitation in WM before aging. The dislocation density decreased in HAZ and WM after aging for 6000 h. The property results showed that hardness of WM and HAZ was decreased significantly after aging for 6000 h due to the weakening of solution strengthening and dislocations strengthening. However, the change in the hardness of the base metal by aging remained at a minor level. (C) 2016 Elsevier B.V. All rights reserved.
机译:本文旨在研究中国低活化马氏体钢焊接接头在550℃下热老化6000 h后的组织演变和硬度分布的变化。通过电子束焊接对接头进行处理。与贱金属(BM)和热影响区(HAZ)相比,在时效条件下,焊缝金属(WM)中未形成Laves相,这是由于时效前WM中的钽含量较高且析出较少。老化6000 h后,HAZ和WM中的位错密度降低。性能结果表明,由于固溶强化和位错强化作用减弱,WM和HAZ的硬度在老化6000 h后明显降低。但是,因时效而使母材的硬度变化保持在很小的水平。 (C)2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Nuclear Engineering and Design》 |2016年第8期|666-671|共6页
  • 作者

    Wang Wei; Zhang Junyu; Xu Gang.;

  • 作者单位

    Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China|Univ Sci & Technol China, Hefei, Anhui, Peoples R China;

    Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China|Univ Sci & Technol China, Hefei, Anhui, Peoples R China;

    Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 00:41:53

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