High-Entropy alloys as high temperature materials? Microstructure, mechanical properties, oxidation and corrosion behaviour.

高熵合金作为高温材料？

• 批准号: 184114772
• 负责人: Professor Dr.-Ing. Uwe Glatzel
• 金额: --
• 依托单位: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/184114772?language=en
• 关键词: Entropy; alloys; temperature; materials; Microstructure

Modifications of the alloy Al8Cr17Co17Cu8Fe17Ni33 will be investigated. This alloy turned out to be the most promising high entropy alloy up to now. It solidifies in a simple fcc solid solution and an ordered phase with L12 structure. The phase fractions and hence the alloys properties will be adjusted by additions of Ti, Ta and/or W. In order to better understand the formation of the phases it is important to investigate the high entropy alloys in detail in the as-cast state and after heat treatments. The microstructure and the mechanical properties will be correlated. A major aim of the project is the investigation of the thermal stability of the microstructure under mechanical load. The corrosion and oxidation resistance of these alloys are important for future application and will therefore be investigated. The following methods will be used in the project: X-ray diffraction, scanning and transmission electron microscopy, 3-dimensional atom probe, micro hardness testing, mechanical tests (e.g. hot tension and creep testing). The results will be discussed in terms of models using the already acquired knowledge about phase formation in high entropy alloys. Finally conclusions will be drawn concerning the suitability of high entropy alloys for the application as refractory materials.

将研究Al8Cr17Co17Cu8Fe17Ni33合金的变质处理。该合金是目前最有前途的高熵合金。它以简单的面心立方固溶体和具有L12结构的有序相凝固。添加Ti、Ta和/或W可以调整合金的相组成和性能。为了更好地了解相的形成，有必要对铸态和热处理后的高熵合金进行详细的研究。显微组织与力学性能之间存在一定的相关性。该项目的一个主要目的是研究微结构在机械载荷下的热稳定性。这些合金的耐腐蚀性和抗氧化性对未来的应用非常重要，因此将进行研究。该项目将使用以下方法：X射线衍射、扫描和透射电子显微镜、三维原子探针、显微硬度测试、力学测试(如热拉伸和蠕变测试)。这些结果将根据已经获得的关于高熵合金中相形成的知识在模型中进行讨论。最后对高熵合金作为耐火材料应用的适宜性进行了总结。

项目成果

On the Path to Optimizing the Al-Co-Cr-Cu-Fe-Ni-Ti High Entropy Alloy Family for High Temperature Applications

• DOI: 10.3390/e18040104
• 发表时间: 2016-04-01
• 期刊: ENTROPY
• 影响因子: 2.7
• 作者: Manzoni, Anna M.;Singh, Sheela;Wanderka, Nelia
• 通讯作者: Wanderka, Nelia

High-Temperature Tensile Strength of Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy (High-Entropy Alloy)

• DOI: 10.1007/s11837-015-1484-7
• 发表时间: 2015-10-01
• 期刊: JOM
• 影响因子: 2.6
• 作者: Daoud, H. M.;Manzoni, A. M.;Glatzel, U.
• 通讯作者: Glatzel, U.

Investigation of phases in Al23Co15Cr23Cu8Fe15Ni16 and Al8Co17Cr17Cu8Fe17Ni33 high entropy alloys and comparison with equilibrium phases predicted by Thermo-Calc

• DOI: 10.1016/j.jallcom.2012.11.074
• 发表时间: 2013-03-05
• 期刊: JOURNAL OF ALLOYS AND COMPOUNDS
• 影响因子: 6.2
• 作者: Manzoni, A.;Daoud, H.;Wanderka, N.
• 通讯作者: Wanderka, N.

Microstructure and Tensile Behavior of Al8Co17Cr17Cu8Fe17Ni33 (at.%) High-Entropy Alloy

• DOI: 10.1007/s11837-013-0756-3
• 发表时间: 2013-12-01
• 期刊: JOM
• 影响因子: 2.6
• 作者: Daoud, H. M.;Manzoni, A.;Glatzel, U.
• 通讯作者: Glatzel, U.