结果表明：随着变形温度的升高和应变速率的减小，位错密度减小，亚晶粒尺寸增大；
The results show that the dislocation density decreases and the subgrain sizes increase with the increase of deformation temperature and the decrease of the strain rate;
但是晶粒尺寸增大后晶界处因局部腐蚀电流密度增大将会在局部造成更深的腐蚀坑槽并降低耐候性；
The total quantity of corrosion surface defect is decreased due to the decrease of grain boundary energy with the increase of grain size and the atmospheric corrosion resistance is increased.
结果表明：随稀土含量的增加，合金的硬度和晶粒尺寸增大，加入适量的稀土，可提高合金的导电率。
The results show that hardness and grain size of the alloy increases as Rare Earth content is increasing.
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