Based on the CoCrFeMnNi high-entropy alloy with simple face-centered cubic structure (FCC) prepared by vacuum arc melting technology, (CoCrFeMnNi) 85Al6Ti4Cu5 HEA was prepared by adding Al, Ti and Cu elements. Copper mold suction casting, 1473 K sealing homogenization, 70% cold rolling + 923 K aging, water cooling and heat treatment process. The microstructure and phase composition of as-cast and heat-treated high-entropy alloys were systematically characterized by metallographic microscope, scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) and transmission electron microscope (TEM). The microhardness of as-cast and heat-treated high-entropy alloys was tested by Vickers hardness tester. The effect of heat treatment process on the precipitation of the second phase of (CoCrFeMnNi) 85Al6Ti4Cu5 HEA was studied. The experimental results show that the second phase precipitated in the as-cast (CoCrFeMnNi) 85Al6Ti4Cu5 HEA is mainly AlTiNi2 phase with L21 structure. After homogenization, cold rolling, aging and other heat treatment processes, the amount of second phase precipitation gradually increases. The addition of Cu element has a solid solution strengthening effect on CoCrFeMnNi-based high-entropy alloy, and the as-cast microhardness of the alloy reaches 252.9 HV0.5. Combined with the heat treatment process, the alloy forms a FCC + BCC dual-phase structure. The research shows that the addition of Cu element promotes the precipitation of L21 phase. Under the combined effect of solid solution strengthening and second-phase strengthening, the hardness of the alloy after heat treatment reaches a maximum of 484.7 HV0.5. The addition of alloying elements has significantly improved the mechanical properties of high-entropy alloys.
| [1] |
Gao JC, Li R. The Development of Studies in High-Entropy Alloy [J]. 2008, 39: 1 059–1 061
|
| [2] |
Zeng R, Dietzel W, Witte F, et al. . Progress and Challenge for Magnesium Alloys as Biomaterials[J]. Advanced Engineering Materials, 2008, 10(8): B3-B14
|
| [3] |
Zhang WT, Wang XQ, Zhang FQ, et al. . Frontiers in High Entropy Alloys and High Entropy Functional Materials[J]. RARE METALS, 2024, 43(10): 4 639-4 776
|
| [4] |
Gao MC, Yeh JW, Liaw PK, et al. . High-entropy Alloys: Fundamentals and Applications, 2016, Berlin, Springer M]
|
| [5] |
Yeh JW, Chang SY, Hong YD, et al. . Anomalous Decrease in X-ray Diffraction Intensities of Cu-Ni-Al-Co-Cr-Fe-Si Alloy Systems with Multi-Principal Elements[J]. Materials Chemistry and Physics, 2007, 103(1): 41-46
|
| [6] |
Zhou YJ, Zhang Y, Wang YL, et al. . Microstructure and Compressive Properties of Multicomponent Alx(TiVCrMnFeCoNiCu)100-x High-Entropy Alloys[J]. Materials Science and Engineering: A, 2007, 454–455: 260-265
|
| [7] |
Zhou YJ, Zhang Y, Wang YL, et al. . Solid Solution Alloys of Al-CoCrFeNiTix with Excellent Room-Temperature Mechanical Properties[J]. Applied Physics Letters, 2007, 90(18): 181 904
|
| [8] |
Cantor B, Chang ITH, Knight P, et al. . Microstructural Development in Equiatomic Multicomponent Alloys[J]. Materials Science and Engineering: A, 2004, 375–377: 213-218
|
| [9] |
Yeh JW, Chen SK, Lin SJ, et al. . Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes[J]. Advanced Engineering Materials, 2004, 6(5): 299-303
|
| [10] |
SenKov ON, Scott JM, SenKova SV, et al. . Microstructure and Room Temperature Properties of A High-Entropy Tanbhfzrti Alloy[J]. Journal of Alloys and Compounds, 2011, 509(20): 6 043-6 048
|
| [11] |
SenKov ON, SenKova SV, Woodward C. Effect of Aluminum on the Microstructure and Properties of Two Refractory High-Entropy Alloys [J]. Acta Materialia, 2014, 68: 214-228
|
| [12] |
Youssef KM, J ZA, Changning N, et al. . A Novel Low-Density, High-Hardness, High-entropy Alloy with Close-pacKed Single-phase Nanocrystalline Structures[J]. Materials Research Letters, 2015, 3(2): 95-99
|
| [13] |
Sharma AS, Yadav S, Biswas K, et al. . High-entropy Alloys and Metallic Nanocomposites: Processing Challenges, Microstructure Development and Property Enhancement[J]. Materials Science and Engineering: R: Reports, 2018, 131: 1-42
|
| [14] |
Gludovatz B, Hohenwarter A, Catoor D, et al. . A Fracture-Resistant High-Entropy alloy for Cryogenic Applications[J]. Science, 2014, 345(6201): 1 153-1 158
|
| [15] |
Dolique V, Thomann AL, Brault P, et al. . Thermal Stability of AlCoCrCuFeNi High Entropy Alloy Thin Films Studied by in-situ XRD Analysis[J]. Surface and Coatings Technology, 2010, 204(12): 1 989-1 992
|
| [16] |
Ding Q, Zhang Y, Chen X, et al. . Tuning Element Distribution, Structure and Properties by Composition in High-Entropy Alloys[J]. Nature, 2019, 574(7777): 223-227
|
| [17] |
He Y, Cong M, Lei W, et al. . Microstructure, Mechanical and Corrosion Properties of FeCrNiCoMnSi0.1 High-Entropy Alloy Coating Via Tig Arc Melting Technology and High-Frequency Ultrasonic Impact with Welding[J]. Materials Today Advances, 2023, 20: 100 443
|
| [18] |
Için K. Investigation of Phase Transformation Related Magnetic Properties of Ti Addition to Fecocunimn and Fecocunial High Entropy Alloys by Vacuum Arc Melting[J]. Materials Today Communications, 2024, 39: 108 821
|
| [19] |
Karimzadeh M, MaleKan M, Mirzadeh H, et al. . Hot Deformation Behavior Analysis of As-Cast Cocrfeni High Entropy Alloy using Arrhenius-Type and Artificial Neural Network Models[J]. Intermetallics, 2024, 168: 108 240
|
| [20] |
Gludovatz B, Hohenwarter A, Catoor D, Chang EH, George EP, Ritchie RO. A Fracture-Resistant High-Entropy Alloy for Cryogenic Applications[J]. Science, 2014, 345: 1 153-1 158
|
| [21] |
Otto F, Dlouhý A, Somsen C, Bei H, Eggeler G, George EP. The Influences of Temperature and Microstructure on the Tensile Properties of a CoCrFeMnNi high-entropy Alloy[J]. Acta. Mater, 2013, 61: 5 743-5 755
|
| [22] |
Wu Y, Liu WH, Wang XL, Ma D, Stoica AD, Nieh TG, He ZB, Lu ZP. Insituneutron Diffraction Study of Deformation Behavior of A Multi-Component High-Entropy Alloy[J]. Appl. Phys. Lett., 2014, 104: 051910
|
| [23] |
Kumar A, Singh A, Suhane A, Singh AK, Verma PK. Artificial Age Hardening Behavior of A Squeeze Cast Cocrfemnni High Entropy Alloy Reinforced 6082-Aluminium Matrix Composite[J]. Materials Characterization, 2023, 206: 113 401
|
| [24] |
Li Y, Wang Z, Sun L, Wang X. Mechanical Properties and Wear Behaviors of Feconicrmntix High-Entropy Alloys Manufactured by Vacuum Arc Melting[J]. Journal of Materials Research and Technology, 2024, 30: 1 962-1 977
|
| [25] |
Zhang L, Chen B, Huang Y, et al. . A High Strength and High Thermally Stable Nanostructured CoCrFeMnNi Alloy Prepared by High Energy Laser ShocK[J]. Mater. Sci. Eng., A, 2023, 885: 145 656
|
| [26] |
Xin T, Tang S, Ji F, Cui L, He B, Lin X, Tian, Tian X, Hou H, Zhao Y, Ferry M. Phase transformations in an Ultralight BCC Mg Alloy during Anisothermal Ageing[J]. Acta Materialia., 2022, 239: 118 248
|
| [27] |
Kumar J, Albert Linda M, Sadhasivam KG, Gurao P N, Biswas K. The Effect of Al Addition on Solid Solution Strengthening in CoCrFeMnNi: Experiment and Modelling[J]. Acta Materialia., 2022, 238: 118 208
|
| [28] |
Klimova MV, SemenyuK AO, Shaysultanov DG, et al. . Effect of Carbon on Cryogenic Tensile Behavior of Cocrfemnni-Type High Entropy Alloys[J]. Journal of Alloys and Compounds, 2019, 811: 152 000
|
| [29] |
Kumar J, Linda A, Sadhasivam M, et al. . The Effect Of Al Addition on Solid Solution Strengthening in Cocrfemnni: Experiment and Modelling[J]. Acta Materialia, 2022, 238: 118 208
|
| [30] |
He JY, Wang H, Huang HL, et al. . A Precipitation-Hardened High-Entropy Alloy with Outstanding Tensile Properties[J]. Acta Materialia, 2016, 102: 187-196
|
| [31] |
NovaK TG, Vora HD, Mishra RS, et al. . Synthesis of Al0.5CoCr-CuFeNi and Al0.5CoCrFeMnNi High-Entropy Alloys by Laser Melting[J]. Metallurgical and Materials Transactions B, 2014, 45(5): 1 603-1 607
|
| [32] |
Navazani M, Kada SR, Fabijanic D, et al. . Increasing Ductility Via Cu Addition in Alxcrfemnni: Towards A Scrap-Based High Entropy Alloy [J]. Intermetallics, 2024, 164: 108 100
|
| [33] |
Pan Z, Luo H, Wei Y, et al. . Segregation of Solute Elements and Strengthening Effects of Cocrnicux Medium-Entropy Alloys: a Combined Experimental and Simulation Study[J]. Journal of Alloys and Compounds, 2023, 941: 169 015
|
| [34] |
Otto F, Hanold NL, George EP. Microstructural Evolution After Thermomechanical Processing in an Equiatomic, Single-phase CoCrFeMnNi High-Entropy Alloy with Special Focus on Twin Boundaries [J]. Intermetallics, 2014, 54: 39-48
|
| [35] |
Hou J, Zhang M, Ma S, et al. . Strengthening in Al0.25CoCrFeNi High-Entropy Alloys by Cold Rolling[J]. Materials Science and Engineering: A, 2017, 707: 593-601
|
| [36] |
Stepanov ND, Shaysultanov DG, ChernichenKo RS, et al. . Effect of Thermomechanical Processing on Microstructure and Mechanical Properties of the Carbon-Containing Cocrfenimn High Entropy Alloy [J]. Journal of Alloys and Compounds, 2017, 693: 394-405
|
| [37] |
Gangireddy S, Kaimiao L, Gwalani B, et al. . Microstructural Dependence of Strain Rate Sensitivity in Thermomechanically Processed Al0.1Cocrfeni High Entropy Alloy[J]. Materials Science and Engineering: A, 2018, 727: 148-159
|
| [38] |
Karati A, Guruvidyathri K, Hariharan VS, et al. . Thermal Stability of Alcofemnni High-Entropy Alloy[J]. Scripta Materialia, 2019, 162: 465-467
|
| [39] |
Wani IS, Bhattacharjee T, SheiKh S, et al. . Tailoring Nanostructures and Mechanical Properties of Alcocrfeni2.1 Eutectic High Entropy Alloy using Thermo-Mechanical Processing[J]. Materials Science and Engineering: A, 2016, 675: 99-109
|
| [40] |
Wang P, Chen J, Sun B, et al. . Effects of Annealing Process Parameters on Microstructural Evolution and Strength-Ductility Combination of Cocrfemnni High-Entropy Alloy[J]. Materials Science and Engineering: A, 2022, 840: 142 880
|
| [41] |
Fan J, Zhang W. Atomic Scale Diffusion Study in Quaternary and Quinary Alloys of Co-Cr-Fe-Mn-Ni System[J]. Met. Mater. Int., 2024, 30: 457-468
|
RIGHTS & PERMISSIONS
Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature
PDF
