摘要
运用置换原子计算层错能的热力学模型,计算了Ni W、Ni Co合金的层错能.结果表明:随温度升高合金的层错能提高.随着W、Co含量的提高,Ni W、Ni Co合金的层错能提高;随W、Co质量分数的增多,Ni合金层错能先增加后减小,存在极大值,但W使Ni合金层错能增加的幅度较小.
The stacking fault energy (SFE) in Ni-W, Ni-Co alloys were calculated by means of the thermodynamic model of the substitutional atoms. The results show that the stacking fault energies in Ni-W and Ni-Co alloys increase with the increase of temperature and the W and Co concentration. With the increase of the W and Co concentration, the stacking fault energy in Ni-base alloys increase first, then decreases, and there exists a maximum. Compared with the element Co, the element W increases the stacking fault energy of the alloys only to a small extent.
出处
《材料与冶金学报》
CAS
2004年第4期294-297,共4页
Journal of Materials and Metallurgy
基金
国家自然科学基金(50171045).
关键词
NI基合金
层错能
热力学计算
Ni-based alloys
stacking fault energy
thermodynamic calculation
