• Cai Dayong

      Articles written in Bulletin of Materials Science

    • Processing maps for Fe–24Ni–11Cr–3Ti–1Mo superalloy

      Cai Dayong Zhang Chunling Tang Zhiguo Dong Haifeng Wang Peng

      More Details Abstract Fulltext PDF

      Hot deformation characteristics of a Fe-base superalloy were studied at various temperatures from 1000–1200°C under strain rates from 0.001–1 s-1 using hot compression tests. Processing maps for hot working are developed on the basis of the variations of efficiency of power dissipation with temperature and strain rate and interpreted by a dynamic materials model. Hot deformation equation was given to characterize the dependence of peak stress on deformation temperature and strain rate. Hot deformation apparent activation energy of the Fe–24Ni–11Cr–1Mo–3Ti superalloy was determined to be about 499 kJ/mol. The processing maps obtained in a strain range of 0.1–0.7 were essentially similar, indicating that strain has no significant influence on it. The processing maps exhibited a clear domain with a maximum of about 40–48% at about 1150°C and 0.001 s-1.

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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