... 老龄飞机；龙骨梁；剥蚀；拉长晶粒；无弥散区；压应力 [gap=768]KEY WORDS: aging airplane; keel beam; EFC; elongated grain; PFZ; compression stress ...
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The results show that the grain of AA5182 keeps equiaxed before and after deformation, while that of 6016 was elongated due to tension deformation.
观察结果表明AA5182的晶粒在变形前后保持等轴状态不变，而6016的晶粒在变形中被拉长。
The grains are elongated along deformation lines and small precipitations occur in grain boundary of the TMAZ.
热机影响区晶粒沿流线方向拉长且有细小沉淀相在晶界上析出；
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