Phase-feld Study for Texture Evolution in Polycrystalline Materials under Applied Stress

• 作 者: Yanli Lu Liuchao Zhang Yingying Zhou Zheng Chen Jianguo Zhang
• 机 构: State Key Lab of Solidifcation Processing,Northwestern Polytechnical University,
• 出 处: Journal of Materials Science & Technology
• 发表日期: 2013年10期
• 关键词: preferred texture grains uniaxial conserved unfavorable cubic modulus hundreds i

The formation and evolution of deformation texture in polycrystalline materials are studied by phase-field dynamic model.In addition,the driving force of texture evolution is also discussed.In this model,grains with different orientation are defined by a set of continuous non-conserved order parameter fields.Simulation results show that grains with preferred orientation grow at the expense of those with unfavorable orientations.It is more important that,elastic potential rather than elastic energy plays a crucial role in the evolution of texture whether the polycrystalline system is subjected to uniaxial stress or shear stress.

The formation and evolution of deformation texture in polycrystalline materials are studied by phase-field dynamic model. In addition, the driving force of texture evolution is also discussed. In this model, grains with different orientation are defined by a set of continuous non-conserved order parameter fields.Simulation results show that grains with preferred orientation grow at the expense of those with unfavorable orientations. It is more important that, elastic potential rather than elastic energy plays a crucial role in the evolution of texture whether the polycrystalline system is subjected to uniaxial stress or shear stress.