Effect of alloying elements on interdiffusion phenomena in explosive clads of 304LSS/Ti᾿Ta᾿Nb alloy

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• 作者：T. N. Prasanthi ; C. Sudha ; S. Saroja
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：51
• 期：11
• 页码：5290-5304
• 全文大小：2,490 KB
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• 作者单位：T. N. Prasanthi (1) (2)
  C. Sudha (1)
  S. Saroja (1) (2)
  
  1. Microscopy and Thermo-Physical Property Division, Physical Metallurgy Group, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, 603102, India
  2. Homi Bhabha National Institute (HBNI), Department of Atomic Energy (DAE), Mumbai, Maharashtra, 400094, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Dissimilar joints of 304L austenitic stainless steel (SS) and Ti–5Ta–2Nb alloy were fabricated using explosive cladding process with an aim to avoid the formation of brittle intermetallic phases at the interface. Subsequently, diffusion annealing heat treatments were carried out at temperatures in the range of 550–800 °C for various durations. In the present study, concentration and temperature dependence of the distinct diffusion zones, formed at the clad interface, due to interdiffusion of the alloying elements, have been established using Electron Probe Micro Analysis and imaging of the interface. Molar volume showed a close match with the ideal Vegard’s law at low temperatures while a non-linear negative deviation has been observed at high temperatures (800 °C) due to the formation of secondary phases such as FeTi, Fe<sub>2sub>Ti and βTi(Fe) phases. Interdiffusion parameters evaluated by Wagner’s method showed sluggish diffusion kinetics of Fe and Ti at concentration corresponding to a two phase mixture of FeTi and Fe<sub>2sub>Ti. Further, an attempt has been made to understand multicomponent diffusion using Dayananda’s approach and estimation of effective interdiffusion coefficients revealed ~22 µm shift of the interface from Matano plane at 800 °C.