钽元素对Co-8.8Al-9.8W合金微观组织和力学性能的影响规律

doi:10.11896/cldb.20070311

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Abstract In order to study the effect of Ta(tantalum)element on the microstructure and mechanical properties of Co-8.8Al-9.8W superalloys at room temperature, the study on the microstructure and compressive properties of Co-8.8Al-9.8W-xTa (x=0,1,2,4,6,atomic fraction,%) superalloy at room temperature show that the as-cast superalloy microstructure is composed of γ matrix phase and white intergranular phase, and the white inter-granular phase precipitated between dendrites gradually increased with the increase of Ta content, and showed a typical eutectic microstructure with the γ matrix phase. After 1 300 ℃/4 h solution treatment and 900 ℃/50 h aging heat treatment, a uniform and fine γ′ strengthe-ned phase was precipitated on the γ matrix, and with the increase of Ta element content, the cluster-like secondary phase (μ phase, χ phase and β phase) gradually increased. The microhardness of Co-8.8Al-9.8W-xTa (x=0,1,2,4,6) alloy in as-cast and heat-treated state increased with the increase of Ta content, among which the 6Ta alloy had the maximum microhardness in both as-cast and heat-treated conditions, respectively 567HV and 625HV. Under room temperature compression, the yield strength σ_0.2 of the alloy gradually increased with the increase of Ta element content except for 1Ta alloy, and the 6Ta alloy had a maximum yield strength of 1 259 MPa; the maximum compressive strength of the alloy showed to increase first and then decrease with Ta content increases and the 4Ta alloy had a maximum compressive strength of 2 522 MPa; 2Ta alloy of all alloys exhibited a maximum plastic deformation capacity of 22.95%.

Key words： Co-8.8Al-9.8W superalloy microstructure microhardness compressive properties

Published: 25 November 2021 Online: 2021-12-13

CLC number:

TG146.1+6

Fund:National Natural Science Foundation of China (51561019).

About author: Yangtao Xu, member of the Communist Party of China, doctor of engineering, professor, master supervisor,is currently the president of Baiyin New Materials Research Institute. He is mainly engaged in the preparation and performance of cobalt-based alloy, the tea-ching and scientific research of non-ferrous metal electrocrystallization and solar thermal carbon materials. He has presided over and participated in nearly 10 national and provincial science and technology projects such as the National Natural Science Foundation of China and major science and technology projects of Gansu province, as well as horizontal projects of enterprises. Presided over and completed the opening of two state key laboratory funds. He has published more than 40 papers in famous academic journals at home and abroad, including more than 20 papers indexed by SCI, EI and ISTP. His research results have successively won (the first prize winner) the second prize and the third prize of department-level scientific and technological progress, and the participants (main participants) won the second prize of Gansu province technological invention and the first prize of the prefectural department; his students won 3 national and provincial awards; 4 provincial and ministerial-level talent support projects.

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Cite this article:

XU Yangtao,MA Tengfei,WANG Yonghong. Effect of Tantalum on Microstructure and Mechanical Properties of Co-8.8Al-9.8W Alloy[J]. Materials Reports, 2021, 35(22): 22104-22108.

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http://www.mater-rep.com/EN/10.11896/cldb.20070311 OR http://www.mater-rep.com/EN/Y2021/V35/I22/22104

1 Shi C X, Zhong Z Y. Journal of Metals, 2010, 46(11),1281(in Chinese).
师昌绪, 仲增墉. 金属学报, 2010, 46(11),1281.
2 Ma Q H, Wang Q, Dong C. Materials Reports A: Review Papers, 2020, 34(3),157(in Chinese).
马启慧, 王清, 董闯. 材料导报: 综述篇, 2020, 34(3),157.
3 Jin M, Miao N H, Zhao W Y, et al. Computational Materials Science, 2018, 148,27.
4 Bocchini P J, Sudbrack C K, Noebe R D, et al. Acta Materialia, 2018, 159,197.
5 Sato J, Omori T, Oikawa K. Science, 2006, 312(5770),90.
6 Li Y Z, Pyczak F, Oehring M, et al. Journal of Alloys and Compounds, 2017, 729,266.
7 Xu Y T, Li H, Wang Y H, et al. Journal of Alloys and Compounds, 2020, 854(15), 157236.
8 Suzuki A, Pollock T M. Acta Materialia, 2008, 56(6),1288.
9 Lass E A. Journal of Alloys and Compounds, 2020, 825,154158.
10 Zhou X Z, Fu H D, Zhang Y, et al. Journal of Alloys and Compounds, 2018, 768,464.
11 Vorontsov V A, Barnard J S, Rahman K M, et al. Acta Materialia, 2016, 120,14.
12 Sauza D J, Dunand D C, Seidman D N. Acta Materialia, 2019, 174,427.
13 Li Y Z, Pyczak F, Paul J, et al. Journal of Materials Science & Technology, 2018, 34(11),2212.
14 Chen Z M T, Okamoto N L, Demura M, et al. Scripta Materialia, 2016, 121,28.
15 Tomaszewska A, Mikuszewski T, Moskal G, et al. Journal of Alloys and Compounds, 2018, 750,741.
16 Xue F. Effect of Ta and Ti on microstructural stability and creep behavior of novel γ′ strengthened co-base single crystal superalloys. Ph.D. Thesis, National University of Defense Technology, China, 2014(in Chinese).
薛飞. 钽和钛对新型钴基单晶高温合金组织稳定性与高温蠕变行为的影响研究. 博士学位论文, 国防科学技术大学, 2014.
17 Liu X J, Pan Y W, Chen Y C, et al. Metals, 2018, 8(7),5.
18 Moskal G, Migas D, Niemiec D, et al. Journal of Engineering Materials and Technology, 2019, 141(4),1.
19 Lu S, Antonov S, Li L F, et al. Acta Materialia, https://doi.org/10.1016/j.actamat.2020.03.015.
20 Bezold A, Volz N, Xue F. et al. Metallurgical and Materials Transactions, 2020, 51(4),1567.
21 Lu S, Antonov S, Li L F, et al. Metallurgical and Materials Transactions, 2018, 49(9),4079.
22 Zhou H J, Li L F, Antonov S, et al. Materials Science and Engineering, 2020, 772,138791.
23 Qu S S, Li Y J, Wang C P, et al. Materials science and Engineering, 2020, 787,139455.