• R N Ghosh

      Articles written in Bulletin of Materials Science

    • Creep strain prediction of 2 1/4 Cr 1Mo steel—A model based approach

      R N Ghosh S Chaudhuri

      More Details Abstract Fulltext PDF

      The paper examines the potential of a model based approach for predicting creep behaviour of 2 1/4 Cr 1Mo steel. Effects of prior strain and thermal aging on the shape of the creep curve have been experimentally established. Particle coarsening has been identified as the dominant mechanism of creep. Creep curves theoretically simulated using particle coarsening model have been compared with those obtained for a variety of initial microstructural conditions.

    • Modelling high-temperature creep of anisotropic material

      R N Ghosh

      More Details Abstract Fulltext PDF

      Cast single-crystal superalloys are being used as turbine blades in modern aeroengines with 〈001〉 axis oriented along the direction of principal stress. This allows use of higher operating temperature with associated improvement in efficiency. Although 〈001〉 is the natural direction of crystal growth in these alloys it is often not possible to attain perfect alignment. Consequently, besides time-dependent deformation this would induce a change in cross-sectional shape and crystal orientation of the blade as a results of service exposure. Therefore in order to exploit their full potential it is necessary to develop a predictive system which could model effect of crystallographic anisotropy on hightemperature creep deformation of such materials. The paper reviews the recent developments in this direction and suggests that modelling not only helps in identifying the dominant mechanisms of deformation but also suggests simple experiments to verify them.

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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