Embedded-atom method study of the effect of the order degree on the lattice parameters of Cu-based shape memory alloys
Jianian Gui; Yanling Cui; Shengqiu Xu; Qinglin Wang; Yiying Ye; Meizhi Xiang; Renhui Wang; Jianian Gui; Dept. of Phys., Wuhan Univ., China; Yanling Cui; Dept. of Phys., Wuhan Univ., China; Shengqiu Xu; Dept. of Phys., Wuhan Univ., China; Qinglin Wang; Dept. of Phys., Wuhan Univ., China; Yiying Ye; Dept. of Phys., Wuhan Univ., China; Meizhi Xiang; Dept. of Phys., Wuhan Univ., China; Renhui Wang; Dept. of Phys., Wuhan Univ., China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1994-06-13
Аннотация:
Using the embedded-atom method, the variation in the total energies and lattice parameters with the degree of long-range order has been calculated for the parent and 18R<sub>1</sub> martensite phases for several Cu-Zn-Al and Cu-Al-Ni shape memory alloys. It was found that the bond angle phi , i.e. the angle between lines connecting the nearest neighbours in the basal plane of the martensite, increases with increase in degree S<sub>B2</sub> of B2-type order for both Cu-Zn-Al and Cu-Al-Ni alloys. When the degree S<sub>L2</sub> of L2<sub>1</sub>-type order increases, the bond angle phi increases for the Cu-Zn-Al shape memory alloys, but it decreases for the Cu-Al-Ni shape memory alloys. This result agrees well with experiment.
554.6Кб