Determination of the growth restriction factor and grain size for aluminum alloys by a quasi-binary equivalent method

► A new method to determine the growth restricting factor. (Q) is proposed ► The proposed method is highly accurate (R2 = 0.99) and simple. ► A major novelty of this method is the determination of Q for non-dilute samples. ► The method proposed herein is based on quasi-binary phase diagrams and composition. ► This method can be easily implemented industrially or as a research tool.