J111012 微細塑性加工と焼鈍による単結品金属の静的再結晶挙動([J11101]マイクロナノ理工学:nmからmmまでの表面制御とその応用(1))

Abstract

In order to reveal static recrystallization in a single crystal metal, we investigate nucleation and growth behaviors of an individual recrystallized grain in a single crystal copper by using the nano plastic forming (NPF). First, the NPF which is a direct indentation of a diamond tool is performed to a single crystal copper. Then, the thermal annealing of the formed copper specimen is conducted to generate the static recrystallization. To clarify the plastic deformation and the static recrystallization behaviors, crystal orientation and dislocation microstructure in the formed specimen are studied by the electoron backscattered diffraction (EBSD) and the high voltage transmission electron microscopy (HVTEM). The results show that dense dislocation cell and subgrain structures are generated by the NPF. And, it is found that the nucleation and growth of the recrystallized grains from the subgrain structures are occurred.