退火对Al0.2CoCrFeNiMo0.3高熵合金组织结构与力学性能的影响

韩春霞; 吴亚楠; 刘志宇; 刘景顺

doi:10.3969/j.issn.1674-6457.2025.12.003

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精密成形工程 ›› 2025, Vol. 17 ›› Issue (12) : 25-34. DOI: 10.3969/j.issn.1674-6457.2025.12.003

高熵与非晶合金的先进成型工程

退火对Al_0.2CoCrFeNiMo_0.3高熵合金组织结构与力学性能的影响

韩春霞, 吴亚楠, 刘志宇, 刘景顺^*

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Influence of Annealing on Microstructure and Mechanical Properties of Al_0.2CoCrFeNiMo_0.3 High-entropy Alloys

HAN Chunxia, WU Ya'nan, LIU Zhiyu, LIU Jingshun^*

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摘要

目的研究轧制变形后不同温度退火处理对合金组织结构和力学性能的影响,揭示轧制及热处理对双相高熵合金的强化机制。方法利用XRD、SEM、EDS及EBSD表征合金组织结构,采用拉伸机及纳米压痕仪对合金进行力学特性测试。结果铸态合金呈现FCC+σ组织结构,轧制90%后,σ相衍射峰强度显著减弱,在800 ℃退火后增强;不同温度退火处理后合金显微组织变化过程如下：700 ℃回复阶段完成,900 ℃再结晶过程结束,1 000 ℃再结晶晶粒长大。合金的显微硬度在轧制变形后升高,之后随退火温度的升高而逐渐降低,纳米压痕载荷-深度曲线及硬度值也符合此趋势;纳米压痕硬度点阵分布与合金显微组织变化一致;不同温度退火处理后,合金抗拉强度逐渐降低,断后伸长率逐渐升高,其中900 ℃退火后,合金的强塑性匹配最佳,其抗拉强度达873.4 MPa,断后伸长率保持12.8%。结论与铸态合金相比,CR90+900 ℃退火1 h的工艺参数可改善合金强塑性匹配关系,并使其强化机制转变为以细晶强化为主。

Abstract

The work aims to study the influence of different annealing temperatures after rolling deformation on microstructure and mechanical properties of high-entropy alloys, and reveal the strengthening mechanisms of rolling and heat-treatment on dual-phase high-entropy alloys. The microstructure of alloys was characterized by XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), EDS (Energy Dispersive Spectroscopy), and EBSD (Electron Backscatter Diffraction). The mechanical properties were tested with a tensile testing machine and a nanoindentation tester. The results showed that: As-cast alloys exhibited an FCC (Face-Centered Cubic)+σ phase microstructure. The diffraction peak intensity of the σ phase decreased significantly, while it increased following annealing at 800 ℃ after 90% rolling deformation. After annealing at different temperatures, the microstructure evolution process of alloys was as follows: the recovery stage was completed at 700 ℃, the recrystallization process was concluded at 900 ℃, and the recrystallized grains grew at 1 000 ℃. The microhardness of alloys increased after rolling deformation and decreased gradually as the annealing temperature rose. The variation trends of nanoindentation load-depth curves and hardness values were consistent with this. The array distribution of nanoindentation hardness was consistent with the microstructural evolution of alloys. After annealing at different temperatures, the tensile strength of alloys decreased gradually, while the elongation after fracture increased progressively. Among them, alloys annealed at 900 ℃ exhibited the optimal strength-plasticity matching, with a tensile strength of 873.4 MPa and an elongation after fracture of 12.8%. Compared with as-cast alloys, the process parameters of CR90 and annealing at 900 ℃ for 1 h can improve the strength-plasticity matching relationship of alloys and transform the strengthening mechanism into one dominated by fine grain strengthening.

导出引用

韩春霞, 吴亚楠, 刘志宇, 刘景顺. 退火对Al_0.2CoCrFeNiMo_0.3高熵合金组织结构与力学性能的影响[J]. 精密成形工程. 2025, 17(12): 25-34 https://doi.org/10.3969/j.issn.1674-6457.2025.12.003

HAN Chunxia, WU Ya'nan, LIU Zhiyu, LIU Jingshun. Influence of Annealing on Microstructure and Mechanical Properties of Al_0.2CoCrFeNiMo_0.3 High-entropy Alloys[J]. Journal of Netshape Forming Engineering. 2025, 17(12): 25-34 https://doi.org/10.3969/j.issn.1674-6457.2025.12.003

中图分类号： TG166.7

参考文献

[1] YEH J W, CHEN S K, LIN S J, 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.
[2] CANTOR B, CHANG I T H, KNIGHT P, et al. Microstructural Development in Equiatomic Multicomponent Alloys[J]. Materials Science and Engineering: A, 2004, 375: 213-218.
[3] MIRACLE D B, SENKOV O N.A Critical Review of High Entropy Alloys and Related Concepts[J]. Acta Materialia, 2017, 122: 448-511.
[4] WU Y Q, LIAW P K, LI R X, et al.Relationship between the Unique Microstructures and Behaviors of High-Entropy Alloys[J]. International Journal of Minerals, Metallurgy and Materials, 2024, 31(6): 1350-1363.
[5] GLUDOVATZ B, HOHENWARTER A, CATOOR D, et al.A Fracture-Resistant High-Entropy Alloy for Cryogenic Applications[J]. Science, 2014, 345(6201): 1153-1158.
[6] LAPLANCHE G, KOSTKA A, HORST O M, et al.Microstructure Evolution and Critical Stress for Twinning in the CrMnFeCoNi High-Entropy Alloy[J]. Acta Materialia, 2016, 118: 152-163.
[7] COUZINIÉ J P, DIRRAS G.Body-Centered Cubic High-Entropy Alloys: From Processing to Underlying Deformation Mechanisms[J]. Materials Characterization, 2019, 147: 533-544.
[8] ZHOU Y J, ZHANG Y, WANG Y L, et al.Solid Solution Alloys of AlCoCrFeNiTix with Excellent Room-Temperature Mechanical Properties[J]. Applied Physics Letters, 2007, 90(18): 181904.
[9] ZHAO Y J, QIAO J W, MA S G, et al.A Hexagonal Close-Packed High-Entropy Alloy: The Effect of Entropy[J]. Materials & Design, 2016, 96: 10-15.
[10] SUN S J, TIAN Y Z, AN X H, et al.Ultrahigh Cryogenic Strength and Exceptional Ductility in Ultrafine-Grained CoCrFeMnNi High-Entropy Alloy with Fully Recrystallized Structure[J]. Materials Today Nano, 2018, 4: 46-53.
[11] LIU W H, HE J Y, HUANG H L, et al.Effects of Nb Additions on the Microstructure and Mechanical Property of CoCrFeNi High-Entropy Alloys[J]. Intermetallics, 2015, 60: 1-8.
[12] HAN C X, ZHANG Y, LIU J S, et al.Effect of Mo Content on Microstructure and Mechanical Properties of CoCrFeNi Series High-Entropy Alloys[J]. Journal of Materials Research and Technology, 2024, 30: 8209-8217.
[13] LIAO L H, CHENG Y F, DAI S, et al.Effect of Cold-Rolling and Annealing Temperature on Microstructure, Texture Evolution and Mechanical Properties of FeCoCrNiMn High-Entropy Alloy[J]. Journal of Materials Research and Technology, 2024, 33: 683-697.
[14] HU Y, YANG T, PAN C W, et al.Effect of Annealing Treatment on the Heterogeneous Microstructure and Properties of Cold-Rolled FeCoCrNiMn High-Entropy Alloy[J]. Metals and Materials International, 2025, 31(4): 1052-1065.
[15] KAYA F, DIZDAR K C, ALIAKBARLU S, et al.Self-Propagating High-Temperature Synthesis of AlxCoCrFeNiMoy High-Entropy Alloys: Thermochemical Modelling, Microstructural Evaluation and High Temperature Oxidation Behaviour[J]. Materials Chemistry and Physics, 2024, 318: 129304.
[16] BIJNAVANDI M S, DEHGHANI K.Investigating the Effect of Hot-Rolling and Cold-Rolling on the Microstructure and Mechanical Properties of High Entropy Alloy AlCoCrFeNi_2.1[J]. Journal of Materials Research and Technology, 2025, 36: 10118-10130.
[17] ZHANG Z, CHENG Y, WANG X D, et al.Investigation on Tensile Property and Mechanism of Partially Recrystallized Al_0.1CoCrFeNi High-Entropy Alloy after Cold Rolling and Annealing Treatment[J]. Materials Science and Engineering: A, 2025, 921: 147572.
[18] KHAN M A, ZHANG R X, WANG J J, et al.Tailoring Strength-Ductility Synergy in Fe₆₄Ni₂₀-_xCr₁₂Co₄(TiAl)_x High-Entropy Alloys via Cold Rolling and Controlled Annealing Temperatures[J]. Journal of Alloys and Compounds, 2025, 1037: 182158.
[19] ZHOU J, LIAO H C, CHEN H M, et al.Effect of Cold Rolling on Microstructure and Mechanical Behavior of Fe₃₅Ni₃₅Cr₂₀Mn₁₀ High-Entropy Alloy[J]. Materials Characterization, 2024, 218: 114503.
[20] 华绍春, 丁华, 万元元, 等. 轧制处理对AlCrFe₂Ni₂高熵合金组织与力学性能的影响[J]. 精密成形工程, 2023, 15(6): 155-162.
HUA S C, DING H, WAN Y Y, et al.Effect of Rolling Process on Micro-Structure and Mechanical Strength of AlCrFe₂Ni₂ High Entropy Alloy[J]. Journal of Netshape Forming Engineering, 2023, 15(6): 155-162.
[21] 斯松华, 周方颖, 王建国. 冷轧及热处理对Al_0.3CoCrFeNi高熵合金组织及性能的影响[J]. 金属热处理, 2020, 45(3): 103-108.
SI S H, ZHOU F Y, WANG J G.Effects of Cold Rolling and Heat Treatment on Microstructure and Properties of Al_0.3Co CrFeNi High Entropy Alloy[J]. Heat Treatment of Metals, 2020, 45(3): 103-108.
[22] 陈今良, 冯中学, 张利民, 等. 冷轧变形对CrCoNi合金组织与性能的影响[J]. 金属热处理, 2022, 47(5): 204-207.
CHEN J L, FENG Z X, ZHANG L M, et al.Effect of Cold Rolling Deformation on Microstructure and Properties of CrCoNi Alloy[J]. Heat Treatment of Metals, 2022, 47(5): 204-207.
[23] MA X L, WEI B L, FENG X N, et al.Effect of Rolling Process on Deformation Structure and Mechanical Properties of CoCrFeNiMo_0.35 High Entropy Alloy[J]. Journal of Materials Research and Technology, 2024, 33: 8111-8120.
[24] 姜梦媛, 吴振楠, 吴成博, 等. 退火温度对冷轧态CoCrFeNi高熵合金力学性能的影响[J]. 金属热处理, 2025, 50(2): 128-132.
JIANG M Y, WU Z N, WU C B, et al.Effect of Annealing Temperature on Mechanical Properties of Cold-Rolled CoCrFeNi High Entropy Alloy[J]. Heat Treatment of Metals, 2025, 50(2): 128-132.
[25] 李杰, 吴凯迪, 牛利冲, 等. 退火温度对(Fe₅₀Mn₃₀Co₁₀Cr₁₀)₉₇Al₃高熵合金再结晶行为及力学性能的影响[J]. 稀有金属材料与工程, 2023, 52(12): 4251-4259.
LI J, WU K D, NIU L C, et al.Effect of Annealing Temperatures on Recrystallization Behavior and Mechanical Properties of (Fe₅₀Mn₃₀Co₁₀Cr₁₀)₉₇Al₃ High-Entropy Alloy[J]. Rare Metal Materials and Engineering, 2023, 52(12): 4251-4259.
[26] 康亮, 梁霄鹏, 李慧中, 等. 轧制及退火对FeCoCrNiN_0.07高熵合金组织及力学性能的影响[J]. 热加工工艺, 2024, 53(17): 94-97.
KANG L, LIANG X P, LI H Z, et al.Effects of Rolling and Annealing on Microstructure and Mechanical Properties of FeCoCrNiN_0.07 High-Entropy Alloy[J]. Hot Metal Working Technology, 2024, 53(17): 94-97.
[27] WU Y Z, LIU S L, LUO K G, et al.Deformation Mechanism and Mechanical Properties of a CoCrFeNi High-Entropy Alloy via Room-Temperature Rolling, Cryorolling, and Asymmetric Cryorolling[J]. Journal of Alloys and Compounds, 2023, 960: 170883.