Microstructure and Tensile Behavior of Al8Co17Cr17Cu8Fe17Ni33 (at.%) High-Entropy Alloy
Microstructure and Tensile Behavior of Al8Co17Cr17Cu8Fe17Ni33 (at.%) High-Entropy Alloy
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DOI：
10.1007/s11837-013-0756-3
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发表时间：
2013-12-01
期刊：
影响因子：
2.6
通讯作者：
Glatzel, U.
中科院分区：
文献类型：
--
作者：
Daoud, H. M.;Manzoni, A.;Glatzel, U.
研究了高熵合金Al8Co17Cr17Cu8Fe17Ni33(at.%)在室温和500A℃铸态及不同热处理条件下的组织演变和拉伸行为。利用光学显微镜、扫描电子显微镜和透射电子显微镜进行了详细的微结构表征。用集成了TTNi-7数据库的Thermo-Calc软件(瑞典斯德哥尔摩的Thermo-Calc软件)计算了平衡相随温度的变化。观察到的主要相是所有测试样品的面心立方固溶体。通过1150A℃的热处理提高了室温和高温下的拉伸延性。在700A℃的热处理后观察到了脆化现象，导致拉伸性能显著下降。
Microstructure evolution and tensile behavior of the high-entropy alloy Al8Co17Cr17Cu8Fe17Ni33 (at.%) are investigated at room temperature and at 500A degrees C in the as-cast state and under different heat-treatment conditions. Detailed microstructural characterizations are carried out using optical microscopy, scanning electron microscopy, and transmission electron microscopy. The equilibrium phase evolution as a function of temperature was calculated using the Thermo-Calc software (Thermo-Calc Software, Stockholm, Sweden) integrated with TTNi-7 database. The observed majority phase is a face-centered cubic solid solution for all tested specimens. Tensile ductility at room temperature and at elevated temperature is enhanced by heat treatment at 1150A degrees C. An embrittlement phenomenon has been observed after a heat treatment at 700A degrees C resulting in significant degradation in tensile properties.