利用XRD、SEM、DSC和TG等方法研究了Al_xFeCoNiCrTi(x=0.5,1,1.5)高熵合金铸态和不同温度退火后的显微组织、相结构、硬度及其抗氧化性能.结果表明:随着退火温度升高,Al_(0.5)FeCoNiCrTi合金和Al_1FeCoNiCrTi合金在785℃左右退火会析出Fe_2Ti型的Laves相,合金中的fcc和bcc2相除了长大外,形态基本没有变化;而Al_(1.5)FeCoNiCrTi合金基本保持铸态组织不变;铸态及退火态合金硬度较高(约60 HRC),具有非常强的抗回火软化能力以及一定的高温应用价值;该系合金具有优越的抗氧化性能,尤其Al_(0.5)FeCoNiCrTi合金的抗氧化性能最佳.
.The microstructure,phase structure,hardness and oxidation resistance of as-cast and annealed at different temperatures Al_xFeCoNiCrTi(x=0.5,1 and 1.5) high-entropy alloys were investigated by using XRD,SEM,DSC and TG.The results show that,with increasing the annealing temperature,Fe_2 Ti type Laves phase precipitated from Al_(0.5) FeCoNiCrTi and Al_1FeCoNiCrTi alloys annealed at 785 ℃.The morphology of fcc and bcc2 phases in the alloys had no transformation,but the grains grew up.The microstrueture of Al_(1.5) FeCoNiCrTi alloy was stable,and was as-cast microstrueture.The hardness of as-cast and annealed alloys was about 60 HRC and exhibited extreme tempering resistance and possess application value under high temperature condition.The alloys had excellent performance in oxidation resistance,and that of Al_(0.5)FeCoNiCrTi was the best.
参考文献
| [1] | Jien-Wei Yeh;Swe-Kai Chen;Su-Jien Lin;Jon-Yiew Gan;Tsung-Shune Chin;Too-Tsung Shun;Chun-Huei Tsau;Shou-Yi Chang .Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes[J].Advanced Engineering Materials,2004(5):299-303. |
| [2] | Ping-Kang Huang;Jien-Wei Yeh;Tao-Tsung Shun;Swe-Kai Chen .Multi-Principal-Element Alloys with Improved Oxidation and Wear Resistance for Thermal Spray Coating[J].Advanced Engineering Materials,2004(1/2):74-78. |
| [3] | CHIN-YOU HSU;JIEN-WEI YEH;SWE-KAI CHEN .Wear Resistance and High-Temperature Compression Strength of Fcc CuCoNiCrAl_(0.5)Fe Alloy with Boron Addition[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2004(5):1465-1469. |
| [4] | Y.J. Zhou;Y. Zhang;F.J. Wang .Effect of Cu addition on the microstructure and mechanical properties of AlCoCrFeNiTi_(0.5) solid-solution alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):201-204. |
| [5] | 陈敏,刘源,李言祥,陈祥.多主元高熵合金AlTiFeNiCuCrx微观结构和力学性能[J].金属学报,2007(10):1020-1024. |
| [6] | B. Cantor;I.T.H. Chang;P. Knight .Microstructural development in equiatomic multicomponent alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):213-218. |
| [7] | 刘源,李言祥,陈祥,陈敏.多主元高熵合金研究进展[J].材料导报,2006(04):4-6,14. |
| [8] | Chung-Jin Tong;Yu-Liang Chen;Swe-Kai Chen .Microstructure Characterization of Al_xCoCrCuFeNi High-Entropy Alloy System with Multiprincipal Elements[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(4):881-893. |
| [9] | 李伟,刘贵仲,郭景杰.AlxFeCoNiCrTi系高熵合金的组织结构及电化学性能研究[J].铸造,2009(05):431-435. |
| [10] | X.F. Wang;Y. Zhang;Y. Qiao .Novel microstructure and properties of multicomponent CoCrCuFeNiTi_x alloys[J].Intermetallics,2007(3):357-362. |
| [11] | Zhou YJ;Zhang Y;Wang YL;Chen GL .Solid solution alloys of AlCoCrFeNiTix with excellent room-temperature mechanical properties[J].Applied physics letters,2007(18):181904-1-181904-3-0. |
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