Yield strength of a polycrystalline metal with an average grain size, d, is proportional to August 8, 2022 by admin Question: Yield strength of a polycrystalline metal with an average grain size, d, is proportional to [A]. d1/2 [B]. d-1/2 [C]. d [D]. d-1 Answer: Option B Explanation: No answer description available for this question.