A Study on the Orientation Dependence of Plastic Deformation in NiAl Single Crystals by FEA

FEA를 이용한 NiAl 단결정 소성 변형의 결정 방향 의존에 관한 연구

Deformation of single crystals was studied using finite element analysis to investigate the orientation dependence of plastic deformation observed in NiAl single crystals. Investigation of mechanical properties of single crystals is closely related with the understanding of deformation processes in single crystals. Orientation dependence of material behavior in NiAl single crystals was studied by rotating loading directions from 'hard' orientation. The maximum nominal compressed stress in NiAl single crystals was ranged in a quite wide scope depending on the misalignment from 'hard' orientation. As the compressed axis set closer to 'hard' orientation, the maximum nominal compressed stress rapidly increased and made <100> slips difficult to activate. Therefore, non-<100> slips will be activated instead of <100> slips for 'hard' orientation.