• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Study of Surface Morphology in Welds of Ti-5Ta-1.8Nb Alloy Exposed to 11.5 M Boiling Nitric Acid
【24h】

Study of Surface Morphology in Welds of Ti-5Ta-1.8Nb Alloy Exposed to 11.5 M Boiling Nitric Acid

机译：11.5 M沸腾硝酸暴露于Ti-5Ta-1.8Nb合金焊缝表面形貌的研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This article presents the study on corrosion behavior of welds of a Ti-5%Ta-1.8%Nb alloy—a candidate material for reprocessing plant, where it is exposed to highly concentrated (11.5 M) and boiling nitric acid. The corrosion rates of Ti-Ta-Nb alloy in wrought condition have been established earlier to be low (0.26 mpy in liquid). The successful use of this material crucially depends on the behavior of its welds. Evaluation of corrosion rates of the welds in boiling nitric acid in the liquid, vapor, and condensate phases showed that the rates were low, <1 mpy and were comparable or less than those of the base metal. Since microstructure plays an important role in governing the corrosion rate, the microstructures in as-welded and nitric acid exposed conditions were studied. The alloy in “as-welded” state has a martensitic structure, which is microstructurally and microchemically homogeneous. Examination of the corroded surface showed the formation of a protective film, which acts as a barrier to dissolution of Ti after the initial high dissolution. The film was found to be ruptured at regions where Si-rich particles were embedded during surface preparation. The present studies have shown that the Ti-Ta-Nb welds show good corrosion resistance in all three phases of nitric acid and the alloy can be employed in highly oxidizing medium.
机译：本文介绍了Ti-5％Ta-1.8％Nb合金（一种用于后处理厂的候选材料）的焊缝腐蚀行为的研究，该工艺暴露于高浓度（11.5 M）和沸腾的硝酸中。较早地确定了变形条件下的Ti-Ta-Nb合金的腐蚀速率较低（在液体中为0.26 mpy）。这种材料的成功使用关键取决于其焊接性能。液相，气相和冷凝相中沸腾硝酸中焊缝的腐蚀速率评估表明，腐蚀速率低，<1 mpy，并且与贱金属相当或更低。由于微观结构在控制腐蚀速率中起着重要作用，因此对焊接状态和硝酸暴露条件下的微观结构进行了研究。处于“焊接状态”的合金具有马氏体组织，该组织在微观结构和微观化学上均一。腐蚀表面的检查表明形成了保护膜，该保护膜在最初的高溶解度后成为Ti溶解的障碍。发现该膜在表面制备期间在其中嵌入了富硅颗粒的区域破裂。目前的研究表明，Ti-Ta-Nb焊缝在硝酸的所有三个相中均显示出良好的耐腐蚀性，该合金可用于高氧化性介质。

著录项

  • 来源
  • 作者

    Arup Dasgupta; T. Karthikeyan; S. Saroja; V.R. Raju; M. Vijayalakshmi; R.K. Dayal; V.S. Raghunathan;

  • 作者单位

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

    Materials Characterisation Group Indira Gandhi Centre for Atomic Research Kalpakkam 603 102 India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    microstructure; nitric acid; three phase corrosion; Ti alloy; weld;

    机译：显微结构硝酸三相腐蚀钛合金焊接;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号