和添加剂对固体溶液强化和CoNiFe中等度合金中的沉硬化的影响
Piotr Bała1,2, Kamil Górecki3, Rafał Dziurka1
1Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
Materials (Basel, Switzerland)
|September 28, 2023
概括
与 (Al) 不同的是, (Ti) 通过沉硬化显著增强了CoNiFe合金的强度. 添加Ti会产生一个 (CoNi) 3Ti相,比添加Al或组合Al-Ti更能增强合金的性能.
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.
- 合金设计设计 合金设计
背景情况:
- 高合金 (HEA) 为高级应用提供可调节的性能.
- 了解HEA微观结构和机械行为的元素影响对于合金开发至关重要.
研究的目的:
- 研究 (Al) 和 (Ti) 添加剂对基于CoNiFe的合金微观结构和性能的影响.
- 评估由Al和Ti引起的强化机制,包括固体溶液和沉硬化.
主要方法:
- 电弧化用于合金合成 (3-5个组件,中高).
- 使用扫描电子显微镜 (SEM),能量分散式X射线光谱 (EDS),X射线衍射 (XRD) 和传输电子显微镜 (TEM) 的表征.
- 通过测量各种热处理状态 (成型,均化,溶液处理,老化) 的硬度进行机械测试.
主要成果:
- (Al) 的添加 (5 在. 的百分比). 显示了可以忽略不计的固体溶液强化.
- 添加 (Ti) (5 在. 的百分比). 导致了显著的固体溶液强化.
- 由于Ti添加而形成 (CoNi) 3Ti相,观察到沉硬化.
- 来自Ti的沉硬化与Al和Ti的联合强化作用相当,这导致了 (NiCo) 3AlTi沉.
结论:
- 在这些CoNiFe合金中,是比更有效的增强元素.
- 沉硬化,特别是 (CoNi) 3Ti阶段的沉硬化,是提高合金性能的关键机制.
- 该研究提供了关于为所需的机械性能量身定制CoNiFe合金的组成的见解.
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