材料科学与工程学报2025，Vol.43Issue(4)：513-519,524,8.DOI:10.14136/j.cnki.issn1673-2812.2025.04.001
Al-Cu-Mg-Ag合金凝固过程中组织细化的数值模拟
Numerical Simulation of Microstructure Refinement of Al-Cu-Mg-Ag Alloy During Solidification
朱仕清 1张鸿 1陈令浩1
作者信息
- 1. 北京科技大学 材料科学与工程学院,北京 100083
- 折叠
摘要
Abstract
Al-Cu-Mg-Ag alloys have become a research hotspot because of its good heat resistance.Its excellent mechanical properties are inseparable from the regulation of the structure by researchers.The method of material structure simulation has become more and more perfect.This study employs numerical simulation to investigate the microstructure evolution of Al-Cu-Mg-Ag alloys during solidification with the aim of controlling its structure.The size distribution of Ti-containing particles in an Al-Ti-B master alloy was characterized via microstructure observation,serving as a basis for optimizing the nucleation density parameters for particles of varying radii in the phase field model.The addition of refiner inhibited the growth of dendrites and no longer produced coarse dendrites.With the increase of refiner,the grains gradually tended to form cellular morphology.The refined grains were about 100 μm in size.Experimental validation of the simulated as-cast grain morphology was conducted.The samples were observed by metallographic microscope and scanning electron microscope.The addition of refiner had a significant effect on the refinement of the alloy,and the average grain size after refinement was also about 100 μm.At the same time,the XRD phase identification of the alloy was carried out.The observation of the microstructure morphology under the scanning electron microscope showed that the precipitated phase was mainly concentrated on the grain boundary.The Al2Cu accounted for about 5%,and the matrix phase FCC accounted for about 95%,which also corresponded well with the simulation results.关键词
Al-Cu-Mg-Ag合金/相场模拟/枝晶细化/相图计算Key words
Al-Cu-Mg-Ag alloy/Phase field simulation/Dendrite refinement/Phase diagram calculation分类
矿业与冶金引用本文复制引用
朱仕清,张鸿,陈令浩..Al-Cu-Mg-Ag合金凝固过程中组织细化的数值模拟[J].材料科学与工程学报,2025,43(4):513-519,524,8.
