After annealing coarse grain structure was observed and the impact ductility and the elongation of materials increased.

退火以后，发现材料的晶粒长大，材料的冲击韧性与延性提高。

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After annealing coarse grain structure was observed and the impact ductility and the elongation of materials increased.

退火以后，发现材料的晶粒长大，材料的冲击韧性与延性提高。

youdao