Siquieri R, Doernberg E, Emmerich H, Schmid-Fetzer R
Center for Computational Engineering Science and Institute of Minerals Engineering, RWTH Aachen University, D-52056 Aachen, Germany.
J Phys Condens Matter. 2009 Nov 18;21(46):464112. doi: 10.1088/0953-8984/21/46/464112. Epub 2009 Oct 27.
In this work we present experimental and theoretical investigations of the directional solidification of Al-36 wt% Ni alloy. A phase-field approach (Folch and Plapp 2005 Phys. Rev. E 72 011602) is coupled with the CALPHAD (calculation of phase diagrams) method to be able to simulate directional solidification of Al-Ni alloy including the peritectic phase Al(3)Ni. The model approach is calibrated by systematic comparison to microstructures grown under controlled conditions in directional solidification experiments. To illustrate the efficiency of the model it is employed to investigate the effect of temperature gradient on the microstructure evolution of Al-36 wt% Ni during solidification.
在这项工作中，我们展示了对Al-36 wt% Ni合金定向凝固的实验和理论研究。将相场方法（Folch和Plapp，2005年，《物理评论E》，72卷，011602）与CALPHAD（相图计算）方法相结合，以便能够模拟Al-Ni合金的定向凝固，包括包晶相Al₃Ni。通过与定向凝固实验中在受控条件下生长的微观结构进行系统比较，对模型方法进行了校准。为了说明该模型的有效性，将其用于研究温度梯度对Al-36 wt% Ni凝固过程中微观结构演变的影响。
