On the Path to Optimizing the Al-Co-Cr-Cu-Fe-Ni-Ti High Entropy Alloy Family for High Temperature Applications
On the Path to Optimizing the Al-Co-Cr-Cu-Fe-Ni-Ti High Entropy Alloy Family for High Temperature Applications
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DOI：
10.3390/e18040104
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发表时间：
2016-04-01
期刊：
影响因子：
2.7
通讯作者：
Wanderka, Nelia
中科院分区：
文献类型：
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作者：
Manzoni, Anna M.;Singh, Sheela;Wanderka, Nelia
选择了研究最多的高熵合金AlCoCrCuFeNi，通过成分变化和热处理来优化其组织和力学性能。在不同的优化途径中，探讨和比较了偏析元素铜的减少、氧化保护元素铝和铬的增加以及向类似于镍基高温合金的伽马-伽马‘组织转变的途径。每一个优化步骤都进行了微观观察。当合金合适时，已经进行了维氏显微硬度测量和/或拉伸/压缩试验。五种衍生合金AlCoCrFeNi，Al23Co15Cr23Cu8Fe15Ni16，Al8Co17Cr17Cu8Fe17Ni33，Al8Co17Cr14Cu8Fe17Ni34.8Mo0.1Ti1W0.1和Al10Co25Cr8Fe15Ni36Ti6(均为.%)与原始的AlCoCrCuFeNi进行了比较，选出了最有希望的一种进行进一步研究。
The most commonly investigated high entropy alloy, AlCoCrCuFeNi, has been chosen for optimization of its microstructural and mechanical properties by means of compositional changes and heat treatments. Among the different available optimization paths, the decrease of segregating element Cu, the increase of oxidation protective elements Al and Cr and the approach towards a gamma-gamma' microstructure like in Ni-based superalloys have been probed and compared. Microscopical observations have been made for every optimization step. Vickers microhardness measurements and/or tensile/compression test have been carried out when the alloy was appropriate. Five derived alloys AlCoCrFeNi, Al23Co15Cr23Cu8Fe15Ni16, Al8Co17Cr17Cu8Fe17Ni33, Al8Co17Cr14Cu8Fe17Ni34.8Mo0.1Ti1W0.1 and Al10Co25Cr8Fe15Ni36Ti6 (all at.%) have been compared to the original AlCoCrCuFeNi and the most promising one has been selected for further investigation.