多元相图有待开发对于化学成分与加工方法日益复杂的先进合金研制工作来说，相图是迫切需要的一件工具。但是，采用试验方法获得相图很难。而计算机可以成为预测多元相图的有力工具。在二元与三元系基础上，通过外推有望得到多元系统的相图结构。在相分计算（ＣＡＬＰＨＡ... Multiple Phase Diagram to be Developed Phase diagrams are an imperative tool for the development of advanced alloys with increasingly complex chemical compositions and processing methods. However, it is difficult to obtain the phase diagram using the experimental method. Computers can be powerful tools for predicting multiple phase diagrams. On the basis of binary and ternary systems, the phase diagram structure of multivariate system is expected to be obtained by extrapolation. In phase calculation (CALPHA ...