A simulation of the abnormal grain growth in a nano-structural AZ31 Mg alloy by phase field model

作者：Wu Y^*; Zong B Y; Wang M T

来源：Materials Science Forum, 2010, 633-634: 697-705.

DOI：10.4028/www.scientific.net/MSF.633-634.697

• Abnormal grain growth
• Abnormal grains
• Annealing time
• Annealing treatments
• AZ31 alloy
• AZ31 Mg alloy
• AZ31 Mg alloys
• Grain-boundary energy
• High strains
• Interface energy
• Interface mobility
• Nano-size grains
• Phase field methods
• Phase field models
• Single phase
• Small groups
• Structural matrix

<jats:p>Abnormal grain growth was simulated by phase field model in order to find ways of producing scattered a few enormous grains in a nano-structural single phase AZ31 alloy to improve its ductility. It is shown that the abnormal grain growth is controlled by the three keys factors of interface energy, strain restored energy and interface mobility. Therefore, the microstructure with scattered a few enormous grains in the nano-structural matrix can be achieved after an annealing treatment if there is a small group of specially orientated nano-size grains in the original nao-structure with local low grain boundary energy or local high strain energy or local high interface mobility. The morphology of abnormal grains is also examined as function of annealing time to optimize the microstructure. </jats:p>

• 出版日期2010--
• 单位东北大学