4.7 Article

Microstructure evolution, mechanical properties, and corrosion behavior of novel Zr-Ti-V alloys

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141358

关键词

Zirconium; Titanium; Microstructure; Mechanical properties; Corrosion resistance

资金

  1. National Natural Science Foundation of China [51801052/52071126]
  2. Natural Science Foundation of Tianjin City China [19JCZDJC38300]
  3. Foundation Strengthening Program [2019-JCJQ-00]

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The study systematically investigated the effects of different V contents on the microstructure and properties of Zr-Ti alloys. It was found that as the V content increases, the microstructure of the alloys changes and the plasticity is affected. A stable 13 alloy can be obtained when the V content is 8 at%. Additionally, the addition of V element reduces the corrosion resistance of the alloys.
Effects of different V contents on microstructure and properties of Zr-Ti alloys are systematically investigated in this study. Microstructure of as-cast alloys is characterized by optical microscope, X-ray diffractometry, scanning electron microscopy, electron probe microanalysis, and transmission electron microscopy. Mechanical properties of alloys are analyzed using compression and microhardness tests and their corrosion properties are examined using electrochemical tests. alpha lath gradually decreases and relative content of 13 phase increases as the V content increases. A stable 13 alloy can be obtained when the V content is 8 at%. alpha lath precipitation at 13 grain boundary reduces plasticity of alloys, and as-cast alloys demonstrate satisfactory plastic deformation when the V content is 6-10 at%. The addition of V element reduces the corrosion resistance of Zr-Ti binary alloys, while Zr-Ti-8V alloy exhibits improved mechanical properties and corrosion resistance.

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