True and False Self-diffusion is atomic migration in pure metals..i.e., when all

Question

True and False Self-diffusion is atomic migration in pure metals..i.e., when all atoms exchanging position are of the same type. Inter diffusion is diffusion of atoms of one metal into another metal. In Non steady-state diffusion concentration is a function of position only. Plastic deformation takes place due to slip or motion of dislocations. For substitutional solid solution impurity atom goes into the interstitial sites among the host atoms. Yield strength, Toughness and Ductility are sensitive to any prior deformation for example presence of impurities, and or heat treatment to which metal has been subjected. Toughness is the energy absorbed by elastic deformation. The covalent bond is highly directional and may be very strong. The factors that cause a metal to experience a brittle to ductile transition are exposure to stresses at relatively low temperatures, high strain rate and the presence of a sharp notch In polycrystalline materials the crystal with largest t_R yields first and other crystals yield later. Tensile strength is the stress at the maximum on the engineering stress and strain curve.

Explanation / Answer

a.true

B.false

C.true

D.true

E.false

F.true

G.true

H.false

I.true

J.false

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