R N Ghosh
Articles written in Bulletin of Materials Science
Volume 17 Issue 6 November 1994 pp 663-670
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.
Volume 17 Issue 7 December 1994 pp 1341-1350
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.
Volume 44, 2021
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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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