Chinese Journal of Mechanical Engineering >

2022 , Vol. 35 >Issue 5: 84 - 84

DOI: https://doi.org/10.1186/s10033-022-00764-7

Smart Materials

Morphological Heredity of Intermetallic Nb5Si3 Dendrites in Hypereutectic Nb-Si Based Alloys via Non-Equilibrium Solidification

  • Yueling Guo ,
  • Lina Jia ,
  • Wenjun Lu ,
  • Hu Zhang
展开
  • 1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China;
    2. Research Center of Light-alloy Materials, Frontier Institute of Science and Technology Innovation, Beihang University, Beijing, 100191, China;
    3. Max-Planck-Institut für Eisenforschung, Max-Planck-Straße 1, 40237, Düsseldorf, Germany

收稿日期: 2021-01-29

  修回日期: 2022-06-01

  网络出版日期: 2023-04-24

基金资助

Supported by National Natural Science Foundation of China (Grant No. 51571004).

收起

Morphological Heredity of Intermetallic Nb5Si3 Dendrites in Hypereutectic Nb-Si Based Alloys via Non-Equilibrium Solidification

  • Yueling Guo ,
  • Lina Jia ,
  • Wenjun Lu ,
  • Hu Zhang
Expand
  • 1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China;
    2. Research Center of Light-alloy Materials, Frontier Institute of Science and Technology Innovation, Beihang University, Beijing, 100191, China;
    3. Max-Planck-Institut für Eisenforschung, Max-Planck-Straße 1, 40237, Düsseldorf, Germany

Received date: 2021-01-29

  Revised date: 2022-06-01

  Online published: 2023-04-24

Supported by

Supported by National Natural Science Foundation of China (Grant No. 51571004).

Fold

摘要

For hypereutectic Nb-Si based alloys, primary Nb5Si3 phases typically grow in a faceted mode during equilibrium or near-equilibrium solidification, which damages the ductility and toughness. To address this issue, here we artificially manipulate the growth morphology of Nb5Si3 using electron beam surface melting (EBSM) and subsequent annealing treatments. Results show that such a non-equilibrium solidification pathway enables the transition from faceted growth to non-faceted dendritic growth of Nb5Si3, along with evident microstructure refinement, generation of metastable β-Nb5Si3 phases and elimination of chemical segregation. The transformation from β-Nb5Si3 to α-Nb5Si3 and Nb solid solution (Nbss) particles is triggered by the annealing treatment at 1450 ℃ for 5 h. Also, we find the annealing-mediated formation of inherited Nb5Si3 dendrites that maintain the dendritic morphology of the original as-solidified β-Nb5Si3 dendrites. This work thus provides a feasible routine to obtain thermally stable and refined α-Nb5Si3 dendrites in hypereutectic Nb-Si based alloys.

关键词： Nb-Si alloy; Intermetallics; Nb5Si3; Rapid solidification; Dendritic growth

本文引用格式

Yueling Guo , Lina Jia , Wenjun Lu , Hu Zhang . Morphological Heredity of Intermetallic Nb5Si3 Dendrites in Hypereutectic Nb-Si Based Alloys via Non-Equilibrium Solidification[J]. Chinese Journal of Mechanical Engineering, 2022 , 35(5) : 84 -84 . DOI: 10.1186/s10033-022-00764-7

Abstract

For hypereutectic Nb-Si based alloys, primary Nb5Si3 phases typically grow in a faceted mode during equilibrium or near-equilibrium solidification, which damages the ductility and toughness. To address this issue, here we artificially manipulate the growth morphology of Nb5Si3 using electron beam surface melting (EBSM) and subsequent annealing treatments. Results show that such a non-equilibrium solidification pathway enables the transition from faceted growth to non-faceted dendritic growth of Nb5Si3, along with evident microstructure refinement, generation of metastable β-Nb5Si3 phases and elimination of chemical segregation. The transformation from β-Nb5Si3 to α-Nb5Si3 and Nb solid solution (Nbss) particles is triggered by the annealing treatment at 1450 ℃ for 5 h. Also, we find the annealing-mediated formation of inherited Nb5Si3 dendrites that maintain the dendritic morphology of the original as-solidified β-Nb5Si3 dendrites. This work thus provides a feasible routine to obtain thermally stable and refined α-Nb5Si3 dendrites in hypereutectic Nb-Si based alloys.

Key words： Nb-Si alloy; Intermetallics; Nb5Si3; Rapid solidification; Dendritic growth

参考文献

[1] T M Pollock. Alloy design for aircraft engines. Nature Materials, 2016, 15(8): 809-815.
[2] J A Lemberg, R O Ritchie. Mo-Si-B alloys for ultrahigh-temperature structural applications. Advanced Materials, 2012, 24(26): 3445-3480.
[3] B P Bewlay, M R Jackson, P R Subramanian, et al. A review of very-high-temperature Nb-silicide-based composites. Metallurgical and Materials Transactions A, 2003, 34(10): 2043-2052.
[4] S Zhang, L Jia, Y Guo, et al. Improvement in the oxidation resistance of Nb-Si-Ti based alloys containing zirconium. Corrosion Science, 2020, 163: 108294.
[5] Y Qiao, X Guo, Y Zeng. Study of the effects of Zr addition on the microstructure and properties of Nb-Ti-Si based ultrahigh temperature alloys. Intermetallics, 2017, 88: 19-27.
[6] T Fei, Y Yu, C Zhou, et al. The deformation and fracture modes of fine and coarsened NbSS phase in a Nb-20Si-24Ti-2Al-2Cr alloy with a NbSS/Nb5Si3 microstructure. Materials & Design, 2017, 116: 92-98.
[7] S Yuan, L Jia, L Ma, et al. The microstructure optimizing of the Nb–14Si–22Ti–4Cr–2Al–2Hf alloy processed by directional solidification. Materials Letters, 2012, 84: 124-127.
[8] F Wang, L Luo, Y Xu, et al. Effects of alloying on the microstructures and mechanical property of Nb-Mo-Si based in situ composites. Intermetallics, 2017, 88: 6-13.
[9] B Jing, H Qiang, T Liang, et al. Liquid-solid phase equilibria of Nb-Si-Ti ternary alloys. Chinese Journal of Aeronautics, 2008, 21(3): 275-280.
[10] S V Meschel, O J Kleppa. Standard enthalpies of formation of some 4d transition metal silicides by high temperature direct synthesis calorimetry. Journal of Alloys and Compounds, 1998, 274(1): 193-200.
[11] W Liu, H Xiong, N Li, et al. Microstructure characteristics and mechanical properties of Nb-17Si-23Ti ternary alloys fabricated by in situ reaction laser melting deposition. Acta Metallurgica Sinica (English Letters), 2018, 31(4): 362-370.
[12] Y Guo, Z Li, J He, et al. Surface microstructure modification of hypereutectic Nb-Si based alloys to improve oxidation resistance without damaging fracture toughness. Materials Characterization, 2020, 159: 110051.
[13] Y Guo, L Jia, B Kong, et al. Microstructure and surface oxides of rapidly solidified Nb-Si based alloy powders. Materials & Design, 2017, 120: 109-116.
[14] P C Bollada, P K Jimack, A M Mullis. Faceted and dendritic morphology change in alloy solidification. Computational Materials Science, 2018, 144: 76-84.
[15] C Li, Y Y Wu, H Li, et al. Morphological evolution and growth mechanism of primary Mg2Si phase in Al–Mg2Si alloys. Acta Materialia, 2011, 59(3): 1058-1067.
[16] J W Cahn, W B Hillig, G W Sears. The molecular mechanism of solidification. Acta Metallurgica, 1964, 12(12): 1421-1439.
[17] Z Jian, J Chen, F Chang, et al. Crystal-growth transition and homogenous nucleation undercooling of bismuth. Metallurgical and Materials Transactions A, 2011, 42(12): 3785.
[18] Y Guo, L Jia, B Kong, et al. Improvement in the oxidation resistance of Nb-Si based alloy by selective laser melting. Corrosion Science, 2017, 127: 260-269.
[19] Y Guo, J He, Z Li, et al. Tuning microstructures and improving oxidation resistance of Nb-Si based alloys via electron beam surface melting. Corrosion Science, 2020, 163: 108281.
[20] K Xu, Y Li, C Liu, et al. Advanced data collection and analysis in data-driven manufacturing process. Chinese Journal of Mechanical Engineering, 2020, 33: 43.
[21] C H Liebscher, V R Radmilović, U Dahmen, et al. A hierarchical microstructure due to chemical ordering in the bcc lattice: Early stages of formation in a ferritic Fe–Al–Cr–Ni–Ti alloy. Acta Materialia, 2015, 92: 220-232.
[22] I Papadimitriou, C Utton, P Tsakiropoulos. The impact of Ti and temperature on the stability of Nb5Si3 phases: a first-principles study. Science and Technology of Advanced Materials, 2017, 18(1): 467-479.
[23] M E Schlesinger, H Okamoto, A B Gokhale, et al. The Nb-Si (niobium-silicon) system. Journal of Phase Equilibria, 1993, 14(4): 502-509.
[24] J Xiong, Y Li, Z Yin, et al. Determination of surface roughness in wire and arc additive manufacturing based on laser vision sensing. Chinese Journal of Mechanical Engineering, 2018, 31: 74.
[25] J Huang, L Xue, J Huang, et al. Penetration estimation of GMA backing welding based on weld pool geometry parameters. Chinese Journal of Mechanical Engineering, 2019, 32: 55.
[26] S Mathieu, S Knittel, P Berthod, et al. On the oxidation mechanism of niobium-base in situ composites. Corrosion Science, 2012, 60: 181-192.
[27] C McCaughey, P Tsakiropoulos. Type of primary Nb5Si3 and precipitation of Nbss in αNb5Si3 in a Nb-8.3Ti-21.1Si-5.4Mo-4W-0.7Hf (at.%) near eutectic Nb-silicide-based alloy. Materials, 2018, 11(6): 967.
[28] K Zelenitsas, P Tsakiropoulos. Study of the role of Al and Cr additions in the microstructure of Nb–Ti–Si in situ composites. Intermetallics, 2005, 13(10): 1079-1095.
[29] T Riberi Béridot, M G Tsoutsouva, G Regula, et al. Strain building and correlation with grain nucleation during silicon growth. Acta Materialia, 2019, 177: 141-150.
[30] Y Chen, H M Wang. Growth morphologies and mechanism of TiC in the laser surface alloyed coating on the substrate of TiAl intermetallics. Journal of Alloys and Compounds, 2003, 351(1–2): 304-308.
[31] D Kang, T Zhang, C Jiang, et al. Preferred orientation transition mechanism of faceted-growth materials with FCC structure: Competitive advantage depends on 3D microstructure morphologies. Journal of Alloys and Compounds, 2018, 741: 14-20.
[32] H Kang, T Wang, Y Lu, et al. Controllable 3D morphology and growth mechanism of quasicrystalline phase in directionally solidified Al-Mn-Be alloy. Journal of Materials Research, 2014, 29(21): 2547-2555.
[33] R P Liu, W K Wang, D Li, et al. Transition from continuous to lateral growth for Ge crystal in undercooled Ge74Ni26 alloy melts. Scripta Materialia, 1999, 41(8): 855-860.
[34] Z Jian, K Nagashio, K Kuribayashi. Direct observation of the crystal-growth transition in undercooled silicon. Metallurgical and Materials Transactions A, 2002, 33(9): 2947-2953.
[35] R P Liu, T Volkmann, D M Herlach. Undercooling and solidification of Si by electromagnetic levitation. Acta Materialia, 2001, 49(3): 439-444.
[36] D Li, D M Herlach. Direct measurements of free crystal growth in deeply undercooled melts of semiconducting materials. Physical Review Letters, 1996, 77(9): 1801-1804.
[37] J A Sekhar, A Bharti, R Trivedi. Faceted-nonfaceted dendritic transitions during the laser processing of Al2O3-1.0 Wt Pct MgO. Metallurgical Transactions A, 1989, 20(10): 2191-2194.
[38] Y Li, W Zhu, Q Li, et al. Phase equilibria in the Nb–Ti side of the Nb–Si–Ti system at 1200 ℃ and its oxidation behavior. Journal of Alloys and Compounds, 2017, 704: 311-321.
[39] Y H Duan. Stability, Elastic constants and thermodynamic properties of (α, β, γ)-Nb5Si3 phases. Rare Metal Materials and Engineering, 2015, 44(1): 18-23.
[40] B Shao, Y Zong, D Wen, et al. Investigation of the phase transformations in Ti22Al25Nb alloy. Materials Characterization, 2016, 114: 75-78.
Options
文章导航

/

〈 〉

版权所有 © 《Chinese Journal of Mechanical Engineering》编辑部

技术支持：北京玛格泰克科技发展有限公司