Unformatted text preview: at the face centres. Count the atoms in a single unit cell and show that γ΄ is Ni 3 Al (or Ni3Ti). 4. Discuss how γ΄ provides strength. 5. γ΄΄ is more even more complicated. It appears when Nb is added and an ordered arrangement of Ni and Nb appears. It is based on a BCT (with c approx. 0.742 nm and a approx .362 nm) arrangement with Nb at the unit cell corners and in the body centre. Ni is at the top and bottom face centres, at the vertical midedges and in 2 places on each vertical face. Count the atoms in a single unit cell and show that γ΄΄ is Ni 3 Nb. 6. Discuss how γ΄΄ adds strength. M. McDill AERO3700...
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- Spring '11
- Solubility, Solid solution, single unit cell