C、B对退火AlFeMnCoCr系高熵合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2025.04.001

摘要/Abstract

摘要： 采用真空电弧熔炼法制备了Al₁Fe₄₉Mn₃₀Co₁₀Cr₁₀、Al₁Fe_48.5Mn₃₀Co₁₀Cr₁₀C_0.5、Al₁Fe_48.475Mn₃₀Co₁₀Cr₁₀C_0.5B_0.025 3种成分的高熵合金,再经热轧、均匀化退火、冷轧和700 ℃退火30 min处理,采用XRD、EBSD和万能试验机研究C、B间隙原子对高熵合金微观组织和力学性能的影响。结果表明, C、B间隙原子的添加使高熵合金在热轧+均匀化退火后的晶粒尺寸变小,在700 ℃退火后的再结晶程度降低,组织中位错密度和小角度晶界含量增加,降低了退火孪晶的形成能力。B元素的添加强化了晶界,增加了晶界内聚力,降低了变形过程中晶间断裂的概率,提升了塑性,使Al₁Fe_48.475Mn₃₀Co₁₀Cr₁₀C_0.5B_0.025合金表现出优异的强塑积,达42.11 GPa·%。

关键词: 高熵合金, 间隙强化, 微观组织, 力学性能

Abstract: Al₁Fe₄₉Mn₃₀Co₁₀Cr₁₀, Al₁Fe_48.5Mn₃₀Co₁₀Cr₁₀C_0.5 and Al₁Fe_48.475Mn₃₀Co₁₀Cr₁₀C_0.5B_0.025 high entropy alloys were prepared by vacuum arc melting method, and then hot rolling, homogenization, cold rolling and annealing at 700 ℃ for 30 min for the three alloys were carried out. The effects of C and B interstitial atoms on the microstructure and mechanical properties of the tested high entropy alloys were studied by using XRD, EBSD and universal testing machine. The results show that the addition of C and B interstitial atoms makes the grain size of the alloys smaller after hot rolling and homogenization, and the degree of recrystallization reduces after annealing at 700 ℃, the dislocation density and the content of small angle grain boundaries increase, which reduces the formation ability of annealing twins. The addition of B element strengthens the grain boundary, increases the cohesion of the grain boundary, reduces the probability of intergranular fracture during deformation, and improves the plasticity, so that the Al₁Fe_48.475Mn₃₀Co₁₀Cr₁₀C_0.5B_0.025 alloy exhibits excellent product of strength and elongation of 42.11 GPa·%.

Key words: high entropy alloy, interstitial strengthening, microstructure, mechanical properties

中图分类号:

TG139

刘朝辉, 曹炜鹏, 李杰, 冯运莉. C、B对退火AlFeMnCoCr系高熵合金组织及性能的影响[J]. 金属热处理, 2025, 50(4): 1-8.

Liu Zhaohui, Cao Weipeng, Li Jie, Feng Yunli. Effect of C and B on microstructure and properties of annealed AlFeMnCoCr high entropy alloy[J]. Heat Treatment of Metals, 2025, 50(4): 1-8.

参考文献

[1] Liu C J, Gadelmeier C, Lu S L, et al. Tensile creep behavior of HfNbTaTiZr refractory high entropy alloy at elevated temperatures[J]. Acta Materialia, 2022, 237: 118188.
[2] Shahmir H, Mehranpour M S, Arsalan Shams S A, et al. Twenty years of the CoCrFeNiMn high entropy alloy: Achieving exceptional mechanical properties through microstructure engineering[J]. Journal of Materials Research and Technology, 2023, 23: 3362-3423.
[3] Shahmir H, Asghari-Rad P, Mehranpour M S, et al. Evidence of FCC to HCP and BCC-martensitic transformations in a CoCrFeNiMn high entropy alloy by severe plastic deformation[J]. Materials Science and Engineering A, 2021, 807: 140875.
[4] Yeh J W. Recent progress in high entropy alloys[J]. Annales de Chimie Science des Matériaux, 2006, 31(6): 633-648.
[5] Asadikiya M, Yang S, Zhang Y, et al. A review of the design of high entropy aluminum alloys: A pathway for novel Al alloys[J]. Journal of Materials Science, 2021, 56(21): 12093-12110.
[6] Yeh J W, Chang S Y, Hong Y D, 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.
[7] Zhang Y, Zuo T T, Tang Z, et al. Microstructures and properties of high entropy alloys[J]. Progress in Materials Science, 2014, 61: 1-93.
[8] Zhang C, Zhu C, Cao P, et al. Aged metastable high entropy alloys with heterogeneous lamella structure for superior strength-ductility synergy[J]. Acta Materialia, 2020, 199: 602-612.
[9] An Z, Mao S, Liu Y, et al. Inherent and multiple strain hardening imparting synergistic ultrahigh strength and ductility in a low stacking faulted heterogeneous high entropy alloy[J]. Acta Materialia, 2023, 243: 118516.
[10] An Z, Mao S, Jiang C, et al. Achieving superior combined cryogenic strength and ductility in a high entropy alloy via the synergy of low stacking fault energy and multiscale heterostructure[J]. Scripta Materialia, 2024, 239: 115809.
[11] Li Z, Pradeep K G, Deng Y, et al. Metastable high entropy dual-phase alloys overcome the strength-ductility trade-off[J]. Nature, 2016, 534(7606): 227-230.
[12] 赵思杰, 李航, 牛利冲, 等. Al含量对热轧FeMnCoCr系高熵合金组织和性能的影响[J]. 金属热处理, 2022, 47(5): 47-52.
Zhao Sijie, Li Hang, Niu Lichong, et al. Effect of Al content on microstructure and properties of hot rolled FeMnCoCr high entropy alloy[J]. Heat Treatment of Metals, 2022, 47(5): 47-52.
[13] 李航, 李杰, 褚延朋, 等. 冷轧退火对FeMnCoCrAl高熵合金组织和力学性能的影响[J]. 金属热处理, 2020, 45(11): 105-114.
Li Hang, Li Jie, Chu Yanpeng, et al. Effect of cold rolling and annealing on microstructure and mechanical properties of FeMnCoCrAl high entropy alloy[J]. Heat Treatment of Metals, 2020, 45(11): 105-114.
[14] 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 Jie, Wu Kaidi, Niu Lichong, 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.
[15] 耿赵文, 李湘龙, 柏春燕, 等. 间隙强化FeMnCoCr亚稳高熵合金及其低温/临氢服役性能研究进展[J]. 中国有色金属学报, 2024, 34(2): 422-442.
Geng Zhaowen, Li Xianglong, Bo Chunyan, et al. Progress in study of FeMnCoCr matestable high entropy alloy toughening pathways and service performance under hydrogen environment at cryogenic temperature[J]. The Chinese Journal of Nonferrous Metals, 2024, 34(2): 422-442.
[16] Liu Q, Li B, Yi C H, et al. Mechanical properties and deformation mechanisms of C-doped interstitial high entropy alloy CrMnFeCoNi: Effects of strain rate and C content[J]. Intermetallics, 2024, 167: 108237.
[17] Seol J B, Bae J W, Li Z, et al. Boron dopedultrastrong and ductile high entropy alloys[J]. Acta Materialia, 2018, 151: 366-376.
[18] Tu J, Xu K, Liu Y, et al. Characterization of deformation substructure evolution in metastable Fe₄₉Mn₃₀Co₁₀Cr₁₀B₁ interstitial high entropy alloy[J]. Intermetallics, 2022, 144: 107508.
[19] Li Z. Interstitial equiatomic CoCrFeMnNi high entropy alloys: Carbon content, microstructure, and compositional homogeneity effects on deformation behavior[J]. Acta Materialia, 2019, 164: 400-412.
[20] Li Z, Tasan C C, Springer H, et al. Interstitial atoms enable joint twinning and transformation induced plasticity in strong and ductile high entropy alloys[J]. Scientific Reports, 2017, 7(1): 40704.
[21] Li X, Ou M, Wang M, et al. Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy[J]. Journal of Materials Science and Technology, 2021, 60: 177-185.
[22] Barnett M R, Nave M D, Bettles C J. Deformation microstructures and textures of some cold rolled Mg alloys[J]. Materials Science and Engineering A, 2004, 386(1/2): 205-211.
[23] 崔宇. C合金化对CrFeCoNi高熵合金机械性能和腐蚀行为的影响[D]. 武汉: 武汉科技大学, 2020.
[24] Guimarães J R C, Rios P R. Martensite start temperature and the austenite grain-size[J]. Journal of Materials Science, 2010, 45(4): 1074-1077.
[25] Li Z, Tasan C C, Pradeep K G, et al. A TRIP-assisted dual-phase high entropy alloy: Grain size and phase fraction effects on deformation behavior[J]. Acta Materialia, 2017, 131: 323-335.
[26] Dash S, Brown N. An investigation of the origin and growth of annealing twins[J]. Acta Metallurgica, 1963, 11(9): 1067-1075.
[27] Raabe D, Herbig M, Sandlöbes S, et al. Grain boundary segregation engineering in metallic alloys: A pathway to the design of interfaces[J]. Current Opinion in Solid State and Materials Science, 2014, 18(4): 253-261.
[28] Peng J, Li Z, Fu L, et al. Carbide precipitation strengthening in fine-grained carbon-doped FeCoCrNiMn high entropy alloy[J]. Journal of Alloys and Compounds, 2019, 803: 491-498.
[29] Gutierrez-Urrutia I, Raabe D. Dislocation and twin substructure evolution during strain hardening of an Fe-22wt.%Mn-0.6wt.%C TWIP steel observed by electron channeling contrast imaging[J]. Acta Materialia, 2011, 59(16): 6449-6462.