由铁胺Fe3Al衍生的复杂缩合金的结构
Josef Pešička1, Petr Kratochvíl1, Robert Král1
1Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Prague, Czech Republic.
Materials (Basel, Switzerland)
|August 12, 2023
概括
这项研究研究了具有V,Cr和Ni的Fe3Al合金. 增加的合金含量将相结构从单相D03转移到复杂的B2和sigma相,帮助材料设计.
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.
- 固态化学 固态化学
背景情况:
- 基于Fe3Al的合金对于高温应用至关重要.
- 了解它们与合金元素的相位演变对于优化性能至关重要.
- 三级和四级合金可以显著改变相位稳定性和微观结构.
研究的目的:
- 研究不同V,Cr和Ni含量的Fe3Al合金的相位结构和组成.
- 将实验结果与CALPHAD (阶段图计算) 建模相关联.
- 为进一步开发基于Fe3Al的先进材料提供见解.
主要方法:
- 使用扫描电子显微镜 (SEM),X射线衍射 (XRD) 和传输电子显微镜 (TEM) 的实验调查.
- 合金化Fe3Al与V,Cr和Ni在8,12,15和20度的合. 百分比.百分比.百分比.百分比.百分比.百分比.
- 使用TCHEA5数据库进行CALPHAD建模.
主要成果:
- 一个8在. 在. %合金表现出一个单相D03结构.
- 在12点和15点. %合金导致bcc-B2相隔在两个长度尺度.
- 20 在. 在. 在. %合金导致FeNiCrV sigma (σ) 阶段与B2阶段一起形成.
结论:
- Fe3Al合金的相结构对V,Cr和Ni的度非常敏感.
- 实验结果与CALPHAD预测一致,验证了该模型的实用性.
- 这些发现有助于更深入地了解相位形成,并可以指导未来的合金设计以提高性能.
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