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Static recrystallization behavior of AEREX350 superalloy

Hosseinifar, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2010.08.005
  3. Publisher: 2010
  4. Abstract:
  5. The recrystallization behavior of a commercial nickel-cobalt base superalloy, AEREX 350, is investigated by means of hardness test, X-ray diffraction, and microscopy. It is found that the alloy resists recrystallization up to a high temperature of 1025 °C. Recrystallized grains are readily formed at grain boundaries below this temperature; however, the growth of these new grains is inhibited by Widmanstätten η particles having coherent facets with the nickel matrix (γ). The passage of the recrystallization front results in coherency loss and consequently dissolution of the η platelets. Recrystallization proceeds with a discontinuous precipitation of the η phase behind the moving boundary
  6. Keywords:
  7. Cellular recrystallization ; Grain boundary pinning ; AEREX 350 superalloy ; Cobalt-base superalloys ; Coherency loss ; Discontinuous precipitation ; Hardness test ; High temperature ; Moving boundaries ; Nickel matrix ; Recrystallizations ; Recrystallized grains ; Static recrystallization ; Cobalt ; Dissolution ; Grain boundaries ; Grain growth ; Grain size and shape ; Hardness testing ; Superalloys ; X ray diffraction ; X ray diffraction analysis ; Recrystallization (metallurgy)
  8. Source: Materials Science and Engineering A ; Volume 527, Issue 27-28 , October , 2010 , Pages 7313-7317 ; 09215093 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0921509310008634