力量和 Al-Zn-Mg-Cu-Zr 铝合金的破裂坚韧上的 Yb 增加的效果被测量张力的性质和破裂坚韧调查。表面形态学被光显微镜学观察，扫描电......

We have collected nearly all the available observed data of the elements from Ba to Dy in halo and disk stars in the met......