Tensile Behavior and Evolution of the Phases in the Al(10)Co(25)Cr(8)Fe(15)Ni(36)Ti(6) Compositionally Complex/High Entropy Alloy.
Tensile Behavior and Evolution of the Phases in the Al(10)Co(25)Cr(8)Fe(15)Ni(36)Ti(6) Compositionally Complex/High Entropy Alloy.
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DOI：
10.3390/e20090646
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发表时间：
2018-08-29
期刊：
影响因子：
--
通讯作者：
Wanderka N
中科院分区：
文献类型：
--
作者：
Manzoni AM;Haas S;Daoud H;Glatzel U;Förster C;Wanderka N
成分复杂的合金，或高熵合金，是在高温下燃气轮机应用的良好候选者。引入后，以等原子Al17Co17Cr17Cu17Fe17Ni17 （at.%）为起始材料，经过漫长的优化，最终得到了最近优化的Al10Co25Cr8Fe15Ni36Ti6 （at.%）合金，该合金具有良好的力学性能。对铸态和不同热处理后合金组织的演变进行了研究，并提供了一些力学性能的概述。枝晶凝固在枝晶核心处形成两相，在枝晶间形成两种不同的相。热处理后四相中有三相仍然存在。均匀化和随后的退火产生了类似于ni基高温合金的γ-γ′基显微组织。γ相富含Co-Cr-Fe， γ′相富含Al-Ni-Ti。通过对不同相及其纳米硬度测量的研究，支持和加强了对所研究合金力学行为的理解。将观察结果与ni基高温合金、co基合金和co - ni基合金在~800℃的期望应用温度下的力学和显微组织数据进行了比较。
Compositionally complex alloys, or high entropy alloys, are good candidates for applications at higher temperatures in gas turbines. After their introduction, the equiatomic Al17Co17Cr17Cu17Fe17Ni17 (at.%) served as a starting material and a long optimization road finally led to the recently optimized Al10Co25Cr8Fe15Ni36Ti6 (at.%) alloy, which shows promising mechanical properties. Investigations of the as-cast state and after different heat treatments focus on the evolution of the microstructure and provide an overview of some mechanical properties. The dendritic solidification provides two phases in the dendritic cores and two different ones in the interdendritic regions. Three of the four phases remain after heat treatments. Homogenization and subsequent annealing produce a γ-γ’ based microstructure, similar to Ni-based superalloys. The γ phase is Co-Cr-Fe rich and the γ’ phase is Al-Ni-Ti rich. The understanding of the mechanical behavior of the investigated alloy is supported and enhanced by the study of the different phases and their nanohardness measurements. The observations are compared with mechanical and microstructural data from commercial Ni-based superalloys, Co-based alloys, and Co-Ni-based alloys at the desired application temperature of ~800 °C.
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影响因子：
5.8
作者：
Arganda-Carreras, Ignacio;Kaynig, Verena;Seung, H. Sebastian
通讯作者：
Seung, H. Sebastian
影响因子：
15.6
作者：
KAHLWEIT, M
通讯作者：
KAHLWEIT, M
影响因子：
6
作者：
Feng, G.;Li, H.;Sha, J. B.
通讯作者：
Sha, J. B.
影响因子：
9.4
作者：
Makineni, S. K.;Samanta, A.;Chattopadhyay, K.
通讯作者：
Chattopadhyay, K.
DOI：
10.1111/j.1460-2695.1985.tb00434.x
发表时间：
1985-01-01
影响因子：
3.7
作者：
NILSSON, JO;THORVALDSSON, T
通讯作者：
THORVALDSSON, T