Segregation behavior at grain boundary of Mg-ZnÿAlÿ-CaÿSrÿ alloys was calculated by using the grain boundary phase model based on the Hillertÿs
parallel tangential construction to Gibbs energy. The correlations between the calculated segregations and literature values of their maximum texture intensity
and Erichsen value were investigated. The Zn addition in Mg-Ca alloys kept a certain Ca concentration in hcp phase regardless of Ca2Mg6Zn3 precipitation.
The addition of Al and Zn in Mg-Ca alloys promoted the Ca segregation. However, the Al addi-tion in Mg-Ca alloys signicantly decreased Ca concentration in
hcp phase due to precipitation of AlÿMgÿ-Ca compound phases. According to the comparison between the calculated segregation ÿCa and Srÿ and literature
values of maximum texture intensity, the Ca and Sr segregation in grain boundary promoted a decrease of texture intensity of the alloys. The decrease of the
texture intensity of Mg-Al-Ca and Mg-Zn-Sr alloys were relatively small because of the precipitates formation. The negative correlation coefcient of ÿ0.85 was
obtained be-tween the calculated grain boundary segregation of Ca at the rolling temperature and the literature values of maximum texture intensity. It was
estimated that the large amount of Ca segregation at grain boundary region in Mg-Zn-Ca alloys is obtained by rolling at just below the melt-ing point of
Ca2Mg6Zn3 phase in the three-phase region ÿhcp, C14 and Ca2Mg6Zn3ÿ on the phase diagram.