结果表明，激光处理后试样表面熔凝区的组织主要为胞状枝晶组织，经后续热处理可转变为细小的等轴晶粒组织，并形成了良好的超塑连接条件。
The results show that, after laser surface processing, a melt layer with cellular-dendrite structure is formed, which could transform into very fine-grained structure during the annealing treatment.
焊核区由于动态再结晶具有细小的等轴晶粒，旁边存在一个特殊的组织形貌——热机影响区域。
The fine grain and narrow HAZ were found in friction stir weld and the dynamic recrystallization produces fine grain.
过滤后铸棒组织中的柱状晶区缩小，中心等轴晶区扩大、晶粒度降低。
The area of columnar structures decreased, and that of equiaxed crystals enlarged. The grain size reduced.
采用形变热处理工艺，使工业用LF 6合金板材得到细小、等轴的晶粒组织。
A kind of fine and equiaxed crystal structure of LF6 aluminum alloy plate material is obtained by means of the technique of deformation heat treatment.
非典型等轴细晶材料超塑变形中复杂多变的显微组织易于产生晶粒群的运动形式。
Grain group movement is easy found in superplastic deformation of the materials with complex microstructure.
通过对焊接接头组织的分析，发现焊核区晶粒为明显的细化再结晶等轴晶；
The microstructure of the welded joints was studied by optical microscopy. It is found that the weld nugget has a dynamic recrystallization, fine isometric crystal structure.
通过对焊接接头组织的分析，发现焊核区晶粒为明显的细化再结晶等轴晶；
The microstructure of the welded joints was studied by optical microscopy. It is found that the weld nugget has a dynamic recrystallization, fine isometric crystal structure.
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