The empirical relationship for neck growth rate due to lattice diffusion from dislocation sources is R6= _______,

• A. \(\Big(\frac{4}{9}\Big)\)K2Nx2DvF(K2–\(\frac{2\epsilon x}{3\gamma_sa})\)
• B. \(\Big(\frac{4}{9}\Big)\)Nx2DvF(K2–\(\frac{3\epsilon x}{2\gamma_sa})\)
• C. \(\Big(\frac{4}{9}\Big)\)K2Nx2DvF(K2–\(\frac{3\epsilon x}{2\gamma_sa})\)
• D. \(\Big(\frac{4}{9}\Big)\)K2Nx2Dv(K2–\(\frac{3\epsilon x}{2\gamma_sa})\)