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The Effect of Lattice Misfit on Deformation Mechanisms at High Temperature
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Prediction of Mechanical Behaviour in Ni-Base Superalloys Using the Phase Field Model of Dislocations
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Effect of Thermophysical Properties and Processing Conditions on Primary Dendrite Arm Spacing of Nickel-Base Superalloys – Numerical Approach
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Liftime Optimization of Hot Forged Aerospace Components by Linking Microstructural Evolution and Fatigue Behaviour
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Comparison between Microstructure Evolution in IN718 and ATI Allvac® 718PlusTM – Simulation and Trial Forgings
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On the Oxidation Resistance of Nickel-Based Superalloys
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Comparison between Microstructure Evolution in IN718 and ATI Allvac® 718PlusTM – Simulation and Trial Forgings

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Abstract:

Aerospace gas turbine disks operate in an environment of relatively high stresses caused by centrifugal forces and elevated temperatures. Because of the strong mechanical requirements and narrow specifications of such parts not only a correct, defect free final geometry is necessary, but also a defined microstructure. Even though the microstructure evolution during thermo-mechanical processing is well studied and understood for superalloys like IN718, the influences cannot easily be described analytically. Thus simulation tools are used to assure process stability and to optimize design parameters to meet the tough requirements in aerospace industries. Microstructure simulation of IN718 (and other materials) is well established at Bohler Schmiedetechnik GmbH & Co KG and appreciated by its customers. The advent of the newly developed nickel-base superalloy ATI Allvac® 718PlusTM led to extensive investigations and the development of an adapted microstructure model by Bohler Schmiedetechnik GmbH & Co KG and its research partners. Aim of this paper is a comparison of the microstructure evolution in IN718 and ATI Allvac® 718PlusTM during the thermo-mechanical treatment of turbine disks. Influences of process temperature, strain and strain rate on the final grain size are discussed by finite element simulations with a coupled grain structure model. Experimental results from trial forgings are compared with the outcome of the microstructure simulations.

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Periodical:

Advanced Materials Research (Volume 278)

Pages:

168-173

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.278.168

Citation:

Cite this paper

Online since:

July 2011

Authors:

Daniel Huber, Christof Sommitsch, Martin Stockinger

Keywords:

Allvac® 718PlusTM, IN718, Recrystallization, Simulation

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Creative Commons CC BY 4.0

References

[1] K. Schreiber, K. Loehnert and R. F. Singer: Opportunities and Challenges for the New Nickel Base Alloy 718PlusTM", in: "Second Symposium on Recent Advantages of Nb-Containing Materials in Europe, (2006).

Google Scholar

[2] R. A. Jeniski, Jr. and R. L. Kennedy: Development of ATI Allvac® 718PlusTM Alloy and Applications", in: "Second Symposium on Recent Advantages of Nb-Containing Materials in Europe, (2006).

Google Scholar

[3] R. A. Jeniski, Jr. and R. L. Kennedy: Nickel–base superalloy designed for aerospace, Advanced materials & processes 164(12): 19–22, (2006).

Google Scholar

[4] X. Xie, G. Wang, J. Dong, C. Xu, W. -D. Cao and R. Kennedy: Structure stability study on a newly developed nickel–base superalloy — Allvac® 718PlusTM", in: "Superalloys 718, 625, 706 and Derivatives 2005, (E. Loria, Ed. ), p.179–191, TMS (The Minerals, Metals & Materials Society), (2005).

DOI: 10.7449/2005/superalloys_2005_179_191

Google Scholar

[5] D. S. Berstrom and T. D. Bayha: Properties and microstructure of Allvac® 718PlusTM alloy rolled sheet", in: "Superalloys 718, 625, 706 and Derivatives 2005, (E. Loria, Ed. ), p.243–252, TMS (The Minerals, Metals & Materials Society), (2005).

DOI: 10.7449/2005/superalloys_2005_243_252

Google Scholar

[6] R. L. Kennedy: Allvac® 718PlusTM, superalloy for the next forty years", in: "Superalloys 718, 625, 706 and Derivatives 2005, (E. Loria, Ed. ), p.1–14, TMS (The Minerals, Metals & Materials Society), (2005).

DOI: 10.7449/2005/superalloys_2005_1_14

Google Scholar

[7] E. A. Ott, J. Groh and H. Sizek: Metals Affordability Initiative: Application of Allvac Alloy 718Plus® for Aircraft Engine Static Structural Components", in: "Superalloys 718, 625, 706 and Derivatives 2005, (E. Loria, Ed. ), p.35–45, TMS (The Minerals, Metals & Materials Society), (2005).

DOI: 10.7449/2005/superalloys_2005_35_45

Google Scholar

[8] ATI 718-HSTM & 718-DATM Alloys, Technical data sheet, Techn. Report, ATI Allvac Allegheny Technologies, 2020 Ashcraft Ave, PO Box 5030, Monroe, NC 28110-5030, (2008).

Google Scholar

[9] W. -D. Cao: Allvac® 718PlusTM Alloy, Technical data sheet, Techn. Report, ATI Allvac Allegheny Technologies, 2020 Ashcraft Ave, PO Box 5030, Monroe, NC 28110-5030, (2005).

Google Scholar

[10] R. Bürgel: Handbuch Hochtemperatur-Werkstofftechnik, Vieweg, Wiesbaden, 3. Ed., (2006).

Google Scholar

[11] R. F. Decker: Strengthening Mechanisms in Nickel–Base Superalloys", in: "Steel Strengthening Mechanisms Symposium, p.147–171, Climax Molybdenum Company, (1969).

Google Scholar

[12] M. Stockinger, E. Kozeschnik, B. Buchmayr and W. Horwath: Modelling of d-phase dissolution during preheating of Inconel718 turbine disks. ", in: "Superalloys 718, 625, 706 and Derivatives 2001, (E. Loria, Ed. ), p.141–148, TMS (The Minerals, Metals & Materials Society), (2001).

DOI: 10.7449/2001/superalloys_2001_141_148

Google Scholar

[13] Z. Gao and R. V. Grandhi: Microstructure optimization in design of forging processes, International Journal of Machine Tools & Manufacture 40: 691–711, (2000).

DOI: 10.1016/s0890-6955(99)00083-8

Google Scholar

[14] C. M. Sellars and J. A. Whiteman: Recrystallization and grain growth in hot rolling, Metal Science p.187–194, (1979).

DOI: 10.1179/msc.1979.13.3-4.187

Google Scholar

[15] M. Stockinger: Mikrostrukturelle Simulation des Gesenkschmiedens von Nickelbasis– Legierungen, PhD Thesis, University of Technology Graz, (2003).

Google Scholar

[16] D. Huber: Untersuchung des meta-dynamischen Rekristallisationsverhaltens der Nickelbasislegierung Allvac® 718PlusTM und Optimierung der numerischen Gefügesimulation in DEFORM 2DTM, MSc. Thesis, University of Leoben, (2009).

Google Scholar

[17] H. Maderbacher, H. -P. Gänser, M. Riedler, M. Stoschka, M. Stockinger and W. Eichlseder: Lifetime optimization of hot forged aerospace components by linking microstructural evolution and fatigue behaviour, European Symposium on Superalloys and their Application, (2010).

DOI: 10.4028/www.scientific.net/amr.278.162

Google Scholar

[18] C. Sommitsch, D. Huber, F. Ingelman-Sundberg, S. Mitsche, M. Stockinger and B. Buchmayr: Recrystallization and grain growth in the nickel-based superalloy Allvac 718Plus, IJMR 100(8): 1088-1098, (2009).

DOI: 10.3139/146.110152

Google Scholar

[19] C. Stotter, C. Sommitsch, J. Wagner, H. Leitner, I. Letofsky-Papst, G. A. Zickler, W. Prantl and M. Stockinger: Characterization of d–phase in superalloy Allvac 718Plus™, Int. J. Mat. Res. 99(4): 376–380, (2008).

DOI: 10.3139/146.101648

Google Scholar

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