The results show that grain size is significantly refined due to the sharply increases of dislocation density in grain resulting in dislocationtangle after one-turn pressing.
结果表明挤压一次后,晶粒内位错密度急剧增加,形成位错纠缠,晶粒细化效果最明显;
2
The results show that Widmansttten structure needle consists of many blocky subgrains that have higher dislocation density and subgrain boundary is made up of dislocationtangle.