Synthesis and Structural Characterization of V-Ti-Cr Alloy

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• 作者：Chanchal Ghosh (1)
  Joysurya Basu (1)
  Shabana Khan (1)
  Ramachandran Divakar (1)
  E. Mohandas (1)
  M. Vijayalakshmi (1)
  
• 关键词：V–Ti–Cr alloy ; Miedema model ; Vacuum arc melting ; X ; ray diffraction ; Transmission electron microscope
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2013
• 出版时间：August 2013
• 年：2013
• 卷：66
• 期：4
• 页码：381-385
• 全文大小：377KB
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• 作者单位：Chanchal Ghosh (1)
  Joysurya Basu (1)
  Shabana Khan (1)
  Ramachandran Divakar (1)
  E. Mohandas (1)
  M. Vijayalakshmi (1)
  
  1. Physical Metallurgy Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, Tamil Nadu, India
  
• ISSN：0975-1645

文摘

V-4-0)Ti-4-)Cr alloys are the potential candidate materials for the high performance structural applications in fusion power systems due to their favorable mechanical and physical properties. In the present study, the alloy design has been attempted through model based approach for pre mentioned composition range. Thermodynamic calculations have been carried out through Miedema model for this alloy system. The enthalpy difference—composition plot for the ternary V–Ti–Cr system indicate the stability of the solid solution phase in this composition range, which is also in agreement with the atomic size variation which is well within the 15?% size variation limit. Based on these plots, an alloy with a composition of V-Ti-Cr is considered as the reference composition for our study. The alloys have been prepared by melting the desired compositions of highly pure metals in a water cooled vacuum arc melting unit. For structural information, X-ray diffraction experiment has been carried out. The XRD pattern does not contain any signature for the secondary phase formation. The structure is bcc structure with small variation in lattice parameter from that of pure vanadium. Transmission electron microscopy characterization has also been carried out, which confirms the absence of fine secondary phases and the crystal structure as b.c.c.