A.材料發(fā)生了再結(jié)晶 B.合金元素沿晶界聚集 C.所析出的彌散質(zhì)點聚集長大,固溶體晶格畸變程度隨之減小 D.材料中的殘余應力隨時效溫度升高而減小
A.15~20min B.25~45min C.45~70min
A.10~15mm B.15~20mm C.25~30mm