在状Ti-Al合金中的接口和应变能量驱动的变体选择
Zan Zhang1,2, Jicheng Zhuo1,2, Kunning Niu1,2
1School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
Discover nano
|May 13, 2025
概括
本研究探讨了接口如何影响-合金的强度和柔性. 界面弹性应变能量驱动在材料形成过程中选择特定的玛变异.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 计算材料科学科学 计算材料科学
背景情况:
- 金属中的微观结构-属性关系是复杂的,对材料性能至关重要.
- - (Ti-Al) 合金表现出独特的强度-柔性,这是由于具有纳米-拉梅拉和多接口特征的新型多变量玛相微结构.
- 了解这些多变体接口的形成和选择机制是优化合金性能的关键.
研究的目的:
- 调查在Ti-Al合金中核和生长过程中玛 (γ) 变体的优先选择.
- 阐明不同接口类型 (双边界 (TB),伪双边界 (PTB) 和有序域边界 (ODB)) 在变体选择中的作用.
- 确定观察到的接口选择背后的驱动力,特别是接口弹性拉伸能量的影响.
主要方法:
- 用相场模拟来建模 γ 变体的核和生长.
- 分析重点关注不同接口类型 (TB,PTB,ODB) 在过程的不同阶段的比率.
- 研究了界面弹性拉伸能量与特定 γ 变异的选择之间的相关性.
主要成果:
- 阶段场模拟显示了在 γ 变体核化过程中界面的优先选择.
- 双边界 (TB) 的比例在核形成过程中很低,但在生长阶段显著增加.
- 界面弹性应变能量被确定为特定 γ 变体的优先选择的主要驱动因素.
结论:
- 该研究强调了接口弹性拉伸能在指导Ti-Al合金中特定γ变体的发展方面发挥的关键作用.
- 双边界 (TB) 的比例增加与弹性拉伸能量升级相关.
- 这些发现为控制微观结构提供了基本的见解,以提高Ti-Al合金中的强度-柔性.
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