Transactions of the Indian Institute of Metals

, Volume 71, Issue 4, pp 1003–1010 | Cite as

Effect of Annealing Temperature on Punching Shear Strength of Nb-A286 Superalloy

  • Peyman Sahrapour
  • Masumeh Seifollahi
  • Seyed Mahdi Abbasi
Technical Paper


In the present research, effects of cold rolling and subsequent annealing on the microstructure and shear response of A286 superalloy were investigated. The present report has begun with a discussion on the alloy when it is cold-worked, with special emphasis on the formation of deformation bands. Next, following an annealing process in the temperature range of 900–1050 °C for 2–20 min, we have proceeded to depict static recrystallization, grain growth and precipitation phenomena. The mechanical properties evolution and the fracture surface analysis showed the occurrence of softening phenomenon in the temperature range of 900–950 °C as a result of either partial or full recrystallization. At 1050 °C, precipitation of Nb-rich phase caused an increase in ultimate shear strength of the alloy. Additionally, shear punch fracture surfaces of the samples annealed at 900–1000 °C represented dimple mode, with grain boundary decohesion being seen to occur at higher temperatures.


A286 superalloy Recrystallization and Precipitation Nb-rich phase Shear punch test Fracture surfaces Grain boundary decohesion 


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Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  • Peyman Sahrapour
    • 1
  • Masumeh Seifollahi
    • 2
  • Seyed Mahdi Abbasi
    • 2
  1. 1.Iran University of Medical ScienceTehranIran
  2. 2.Metallic Materials Research Center (MMRC)Malek Ashtar University of TechnologyTehranIran

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