The elastic constants C_ 11,C_ 12,C_ 44 of bcc-Fe are 283 GPa,158 GPa and 112 GPa,respectively,which approximately consist with the intrinsic ones.

• 计算得到bcc_Fe的弹性系数C11；C12；C44分别为246GPa；121GPa；113GPa；与实验值基本一致.