Mobilities and dislocation energies of planar faults in an ordered A3B (D019) structure

Bulletin of Materials Science

关键词: Planar faults;    stability;    mobility;    Ti3Al;    intermetallic compound.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Present work describes the stability of possible planar faults of the A3B (D019) phase with an axial ratio less than the ideal. Mobilities and dislocation energies of various planar faults viz. antiphase boundaries (APBs), superlattice intrinsic stacking faults (SISFs) and complex stacking faults (CSFs) have been computed using complex fourth-order tensor transformations and hard sphere model. Displacements normal to the slip planes for various slip systems (vertical shift) have been used to calculate mobility of dislocations. The energy of the planar faults in Ti3Al intermetallic is calculated using some simplifying assumptions. Based on the mobility and energy, stability of planar faults has been explained. These results are compared with single crystal ordered Ti3Al alloy having D019 structure.

【 授权许可】

CC BY