Oxygen gain and aluminum loss during laser metal deposition of intermetallic TiAl
Source abstract
Abstract
For manufacturing turbine parts for the aeronautical industry, lightweight structural materials like titanium aluminides are used. One well known example is the alloy Ti-43.5Al-4Nb-1Mo-0.1B (atomic percent) with the commercial name TNM™. In previous studies, experiments on laser metal deposition of TiAl were performed to evaluate the potential of the technology to repair defective, damaged, or worn blades. Process conditions including postprocess heat treatment were successfully adjusted. However, oxygen pick-up is still a crucial aspect in laser based additive manufacturing of Ti- and TiAl-based alloys. In this work, approaches were made to analyze the oxygen pick-up as a function of processing parameters and the powder particle size. The results show that the build rate and the powder particle size affect the oxygen content in the consolidated material.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · Advanced materials and composites · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Fraunhofer Institute for Laser Technology ILT 1 , Steinbachstr. 15, 52074 Aachen, Germany
RWTH Aachen University—Digital Additive Production 2 , Campus Boulevard 79, 52072 Aachen, Germany
Access e.V. 3 , Intzestr. 5, 52072 Aachen, Germany
Funding
Bundesministerium für Wirtschaft und Energie
References (32)
Show source-provided references
1. Microstructure and mechanical properties of consolidated gamma titanium aluminides10.1179/174329007X186471 ↗
2. Quo vadis gamma titanium aluminide10.1016/S0966-9795(01)00064-4 ↗
3. Advances in optimisation of mechanical properties in cast TiAl alloys10.1016/j.intermet.2004.12.002 ↗
4. Microstructural studies on some ordered Ti-based alloys10.1016/S0966-9795(00)00035-2 ↗
5. Novel design concepts for gamma-base titanium aluminide alloys10.1016/S0966-9795(00)00036-4 ↗
6. Advances in gamma titanium aluminides and their manufacturing techniques10.1016/j.paerosci.2012.04.001 ↗
7. Microstructure of γ-titanium aluminide processed by selective laser melting at elevated temperatures10.1016/j.intermet.2015.07.005 ↗
8. Electron beam melting of Ti–48Al–2Cr–2Nb alloy: Microstructure and mechanical properties investigation10.1016/j.intermet.2010.11.017 ↗
9. Numerical simulation of multi-component evaporation during selective electron beam melting of TiAl10.1016/j.jmatprotec.2017.04.016 ↗
10. Laser metal deposition of the intermetallic TiAl alloy10.1007/s11661-017-4042-9 ↗
11. I. Kelbassa, “Qualification of laser metal deposition of BLISKs out of nickel and titanium base alloys,” Ph.D. thesis, RWTH Aachen University, 2006.
12. Heat treatment of laser metal deposited TiAl TNM alloy10.1016/j.intermet.2018.02.002 ↗
13. The science, technology, and implementation of TiAl alloys in commercial aircraft engines10.1557/opl.2013.44 ↗
14. Microstructure and mechanical properties of a forged β-solidifying γ TiAl alloy in different heat treatment conditions10.1016/j.intermet.2014.11.008 ↗
15. Microstructural design and mechanical properties of a cast and heat-treated intermetallic multi-phase γ-TiAl based alloy10.1016/j.intermet.2013.09.010 ↗
16. In-situ study of the time–temperature-transformation behaviour of a multi-phase intermetallic β-stabilised TiAl alloy10.1016/j.intermet.2014.09.011 ↗
17. Influence of heat treatments on the microstructure of a multi-phase titanium aluminide alloy10.3139/147.110142 ↗
18. Design of novel β-solidifying TiAl alloys with adjustable β/B2-phase fraction and excellent hot-workability10.1002/adem.200800164 ↗
19. W. Wessel, “Mikrostrukturelle Untersuchungen der Rissinitiierung und -ausbreitung in inter-metallischen TiAl-Legierungen unter zyklischer und quasistatischer Belastung,” Dr.-Ing. dissertation, Kassel University, Kassel, 2011.
20. 2012
21. Relative effects of chromium and niobium on microstructure and mechanical properties as a function of oxygen content in TiAl alloys10.1016/j.scriptamat.2006.11.024 ↗
22. Influence of oxygen on phase transformations in a Ti-48 At. pct Al alloy10.1007/s11661-003-0271-1 ↗
23. Influence of oxygen on solidification behaviour of cast TiAl-based alloys10.1016/j.intermet.2007.04.002 ↗
24. Influence of oxygen on microstructure and mechanical properties of directionally solidified Ti–47Al–2Cr–2Nb alloy10.1016/j.matdes.2012.04.050 ↗
25. Changes of oxygen content in molten TiAl alloys as a function of superheat during vacuum induction melting10.1016/S1005-0302(10)60144-2 ↗
26. Influence of oxygen on microstructure and phase transformation in high Nb containing TiAl alloys10.1016/j.matlet.2012.06.013 ↗
27. Experimental studies and thermodynamic simulations of phase transformations in Ti-(41-45)Al-4Nb-1Mo-0.1B alloys10.1557/PROC-1128-U03-06 ↗
28. Effect of oxygen on the microstructure of annealed TiAl based alloy
29. Selective electron beam melting of Ti-48Al-2Nb-2Cr: Microstructure and aluminium loss10.1016/j.intermet.2014.01.004 ↗
30. Powder particle attachment mechanisms onto liquid material10.1016/j.procir.2018.08.064 ↗
31. Behavior of heated powder particles on solid surfaces10.1016/j.promfg.2018.06.105 ↗
32. Relationships between interstitial content, microstructure and mechanical properties in fully lamellar Ti–48Al alloys, with special reference to carbon10.1016/S0966-9795(01)00066-8 ↗