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On fracture initiation mechanisms and dynamic recrystallization during hot deformation of pure nickel

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Abstract

During hot deformation of pure nickel, three distinctive fracture initiation mechanisms are identified: ductile cavity initiation at high strain rates, wedge type intergranular cracks due to grain boundary sliding at intermediate strain rates, and creep cavitation on the boundaries normal to the maximum principal stress at very low strain rates. Dynamic recrystallization is found to be effective in eliminating such fracture damage in a certain range of temperature and strain rate. By combining the strain rate-temperature conditions for the various fracture initiation mechanisms and effective dynamic recrystallization, a hot-working map is developed for nickel, which displays a safe hot working window in the strain rate-temperature field.

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Authors and Affiliations

  1. Department of Chemical and Metallurgical Engineering, Wayne State University, 48202, Detroit, MI

    Chimata Gandhi (Assistant Professor)

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  1. Chimata Gandhi
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Gandhi, C. On fracture initiation mechanisms and dynamic recrystallization during hot deformation of pure nickel. Metall Trans A 13, 1233–1238 (1982). https://doi.org/10.1007/BF02645506

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  • DOI: https://doi.org/10.1007/BF02645506

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