精品文档---下载后可任意编辑γ-TiAl 合金中孔洞生长与弥合的原子模拟的开题报告摘要：γ-TiAl 合金作为一种新型的轻质高强度材料，具有广泛应用前景。但是其中孔洞的存在严重影响了其力学性能，因此讨论孔洞在 γ-TiAl 合金中的生长和弥合机制是十分必要的。本文将采纳分子动力学方法，通过构建模型模拟 γ-TiAl 合金中孔洞的生长和弥合过程，探讨其相关原因，并提出改进方案。结果表明，孔洞的生长主要受原子的扩散和表面能的影响，而孔洞的弥合则需要一定的温度和压力条件。此外，添加 Al 元素可以有效地抑制孔洞的生长。通过这些讨论可以为 γ-TiAl 合金的制备和应用提供理论指导。关键词：γ-TiAl 合金；孔洞；分子动力学；模拟Abstract:As a new type of lightweight and high-strength material, γ-TiAl alloy has broad application prospects. However, the presence of pores seriously affects its mechanical properties. Therefore, it is necessary to study the growth and healing mechanism of pores in γ-TiAl alloy. In this paper, molecular dynamics method will be used to simulate the growth and healing process of pores in γ-TiAl alloy by constructing a model, explore its related reasons, and propose improvement methods. The results show that the growth of pores is mainly affected by the diffusion of atoms and surface energy, while the healing of pores requires a certain temperature and pressure conditions. In addition, adding Al element can effectively inhibit the growth of pores. These studies can provide theoretical guidance for the preparation and application of γ-TiAl alloy.Keywords: γ-TiAl alloy; pore; molecular dynamics; simulation
