Gadolinium doping induced the microstructure evolution and mechanical properties improvement of Nb-Si based in-situ superalloy
Source abstract
Abstract
Nb-Si superalloy is one of the most potential structure-materials of next generation aero engine. The influence of rare-earth element Gd on microstructure and mechanical properties of Nb-16Si-24Ti is explored in this paper. Results show that phase composition no change by doping of Gd. And the mass of Nbss/(Nb, X) 3Si eutectic exists in the matrix instead of primary Nbss. The rare-earth element Gd reduces the Si contents in Nbss phases, and the content of O is also limited because of its high active. The deflection, bridging and secondary crack are easily found in coarsened Nbss, and the peak-value of fracture toughness is 8.37 MPa·m 1/2 in NST-0.05Gd alloy. The phenomenon of solution strength is obvious, and the maximum value of RT compressive strength is 2214 MPa. The thermal compression test indicates that silicide phases play the major role for high-temperature performance, and the Nbss phases have the poor heat-resistance under HT condition.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High Entropy Alloys Studies · Semiconductor materials and interfaces
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Processing high-temperature refractory-metal silicide in-situ composites10.1007/s11837-999-0077-8 ↗
2. Role of deformation temperature and strain rate on microstructural evolution of hot compressed Nb–Si based ultrahigh temperature alloy10.1016/j.intermet.2020.106719 ↗
3. High-temperature wettability and interactions between Hf-containing NbSi-based alloys and Y2O3 ceramics with various microstructures10.1016/j.matdes.2017.10.060 ↗
4. Microstructures and high-temperature oxidation behavior of directionally solidified Nb–Si-based alloys with Re additions10.1007/s12598-016-0788-2 ↗
5. Strength-ductility synergy of element Ru for Nb–Si based in-situ composites10.1016/j.msea.2023.145770 ↗
6. Progress in Nb-Si ultra-high temperature structural materials: a review10.1016/j.jmst.2022.11.022 ↗
7. Effects of alloying on the microstructures and mechanical property of Nb-Mo-Si based in situ composites10.1016/j.intermet.2017.04.018 ↗
8. Effect of Zr addition on the mechanical properties of NbSi based alloys10.1016/j.msea.2019.03.078 ↗
9. Composite alloying effects of V and Zr on the microstructures and properties of multi-elemental Nb–Si based ultrahigh temperature alloys10.1016/j.msea.2021.141175 ↗
10. Solidification behavior and microstructure evolution of Nb-Si-Mo alloy in ultrasonic field10.1016/j.ijrmhm.2022.105933 ↗
11. The microstructures of Nb–18Si–5Ge–5Al and Nb–24Ti–18Si–5Ge–5Al in situ composites10.1016/j.jallcom.2012.10.170 ↗
12. Microstructure evolution and fracture toughness of Nb–Si–Ti based alloy with Cr, Mo and W elements addition10.1016/j.intermet.2021.107408 ↗
13. Microstructural and mechanical characterization of Nb-based in situ composites from Nb–Si–Ti ternary system10.1016/j.actamat.2007.08.012 ↗
14. Effect of C addition on microstructure and mechanical properties of Nb–Si–Ti based alloys10.1016/j.msea.2021.140789 ↗
15. Effect of cerium on microstructures and high temperature oxidation resistance of An Nb-Si system in-situ composite10.1016/S1002-0721(07)60459-1 ↗
16. Enhancement of comprehensive properties of Nb–Si based in-situ composites by Ho rare earth doping10.1007/s12598-024-02765-y ↗
17. Synchronous improvement in room-temperature fracture toughness and high-temperature oxidation resistance of NbSi based alloys with Erbium addition10.1016/j.ijrmhm.2020.105359 ↗
18. Improved toughness and oxidation resistance of NbSi based ultra-high temperature alloys by in-situ generated La2O3 phase10.1016/j.matchar.2024.113686 ↗
19. Effect of Gd addition on the superconducting properties of Ti-based V, Nb, Ta alloys10.1016/j.supcon.2023.100048 ↗
20. The effect of Gd addition on the cyclic oxidation behavior and creep life of alumina-forming Ni-based superalloy10.1016/j.corsci.2020.108694 ↗
21. Effect of thermal exposure on microstructure evolution and mechanical properties of cast beta-solidifying TiAl-based alloy doped with Gd10.1016/j.intermet.2022.107534 ↗
22. Interfacial microstructure, mechanical properties and strengthening mechanism of Mg/Al bimetallic composites produced by a novel compound casting with the addition of Gd10.1016/j.matchar.2023.112898 ↗
23. Effect of Gd addition on phase formation, microstructure, and mechanical performance of a CoCrFeNi multi-principal element alloy10.1016/j.matdes.2023.112365 ↗
24. Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system10.1016/j.calphad.2023.102596 ↗
25. Improving the mechanical properties of Nb-24Ti-16Si-2Al alloy by adding Zr and Fe to regulate silicide10.1016/j.matchar.2022.112566 ↗
26. Synchronous enhancement of hot deformation capacity and properties of Nb-24Ti-16Si-2Al alloy by composite alloying of Fe and V10.1016/j.msea.2022.144223 ↗
27. Effect of Dy addition on microstructure and mechanical properties of Nb-Nb5Si3 eutectic alloy
28. Effects of V addition on the microstructure and properties of multi-elemental Nb–Si based ultrahigh temperature alloys10.1016/j.jallcom.2020.156254 ↗
29. Effect of Mo on microstructure and mechanical behaviour of as-cast Nbss–Nb5Si3 in situ composites10.1016/j.intermet.2006.01.054 ↗
30. Study of the effect of Ti and Ge in the microstructure of Nb–24Ti–18Si–5Ge in situ composite10.1016/j.intermet.2011.04.010 ↗
31. Phase formation and nanohardness of Ti–48Al–2Cr–2Nb-1.5C alloy by melt spinning: the effect of cooling rates10.1016/j.vacuum.2024.112985 ↗
32. Mechanism of solute hardening and dislocation debris-mediated ductilization in Nb-Si alloy10.1016/j.jmst.2024.03.052 ↗
33. Effects of minor Si on microstructures and room temperature fracture toughness of niobium solid solution alloys10.1016/j.msea.2015.04.096 ↗
34. Mechanism of hardening and damage initiation in oxygen embrittlement of body-centred-cubic niobium10.1016/j.actamat.2019.02.030 ↗
35. Alloying effects on fracture mechanisms in Nb-based intermetallic in-situ composites10.1016/S0921-5093(01)01502-7 ↗
36. An as-cast Nb-Si-based alloy with fine-grains and remarkable fracture toughness by minor Sc addition10.1016/j.jallcom.2021.162707 ↗
37. Microstructures and mechanical properties of cast Nb–Ti–Si–Zr alloys10.1016/j.intermet.2008.03.005 ↗
38. Microstructure and compression behavior of in-situ synthesized Ti2AlC reinforced Ti-48Al-2Cr alloy with carbon nanotubes addition10.1016/j.jallcom.2021.158646 ↗
39. Microstructural evolution and mechanical properties of an Nb–16Si in-situ composite with Fe additions prepared by arc-melting10.1016/j.intermet.2012.10.017 ↗
40. Effects of Sm element addition on the workability and microstructure evolution of Mg-Gd-Y-Zr alloy during hot deformation10.1016/j.matdes.2023.111962 ↗
41. Hot compressive deformation behavior of Ti-8Al-1Mo-1 V titanium alloy at elevated temperatures: focus on flow behavior, constitutive modeling, and processing maps, Materials Today
42. Designing lightweight dual-phase refractory VNbTiSi-based eutectic high-entropy alloys for use at elevated temperatures10.1016/j.msea.2022.143112 ↗
43. Zr addition-induced transitions of deformation mechanism at high temperatures of Nb-Si-Ti based multi-alloys: super-dislocations in γ-Nb5Si310.1016/j.matdes.2022.111025 ↗
44. Effect of deformation parameters on microstructure evolution, flow softening behavior and nanoindentation properties of Nb–24Ti–16Si–2Al–4Fe–5V alloy10.1016/j.msea.2023.144862 ↗
45. Strength-ductility synergy of Al-bearing low-density refractory TiNbMo0.5AlX medium entropy alloys via precipitation10.1016/j.msea.2022.143072 ↗
46. Effect of yttrium addition on precipitated phase, corrosion resistance, and mechanical behavior of 6Mo superaustenitic stainless steel10.1016/j.matlet.2023.135174 ↗