실험적 데이터를 이용한 ECAP가공된 Zr의 2차원 몬테칼로 시뮬레이션

초록

Grain boundary character distribution of commercially pure Zr (Zr702) was studied by experiment as well as Monte-Carlo computer simulation. With the application of equal channel angular pressing the grain size was efficiently reduced to 310nm. A strong basal texture developed in as-deformed specimen with a microstructure consisting of mostly high angle grain boundaries. The crystal texture and the grain boundary characteristics were insensitive to the subsequent heat treatment at 800oC. This phenomenon, confirmed by experiment and by the computer simulation as well, was attributed to the high mobility of mostly high angle grain boundaries.