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MIM Nimonic 90
Conclusion
References
MIM Nimonic 90 demonstrated room temperature mechanical properties comparable to Nimonic 90 extruded bar produced by Special Metals. It survived the creep test of 550 MPa at 300°C for 100 hours. The ductility of the H1 treated MIM Nimonic 90 can be recovered by using the third phase of heat treatment profiles (H2 and H3), but this leads to a marginal loss of strength properties. The occurrence of discontinuous carbide (nodular form) along the grain boundaries is believed to enhance ductility.
[1] Special Metals. (2004). Nimonic 90 alloy. 90
Contact Liang Chee Hoo Director of Business Development & Technology AMT Pte Ltd 3 Tuas Lane Singapore 638612 liangch@amt-mat.com www.amt-mat.com
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[2] Özgün, Ö., Gülsoy, H. Ö., Findik, F., & Yilmaz, R. (2012). ‘Microstructure and mechanical properties of injection moulded Nimonic-90 superalloy parts’, Powder Metallurgy, 55 (5), 405–414. https://doi.org/10.1179/1743 290112Y.0000000010 [3] Turbochargers: How They Work, and Current Turbo Technology, by EPI Inc. (n.d.). Retrieved September 15, 2019, from http://www.epi-eng. com/piston_engine_technology/ turbocharger_technology.htm [4] Sims, C. T. (2012). A History of Superalloy Metallurgy for Superalloy Metallurgists. 399–419. https://doi.org/10.7449/1984/ superalloys_1984_399_419
[7] Reed, R. C. (2006). The Superalloys. https://doi.org/10.1017/ CBO9780511541285 [8] ASTM Standard E8/E8M-13a. (2013). ‘Standard Test Methods for Tension Testing of Metallic Materials.’ In ASTM International. https://doi. org/10.1520/E0008_E0008M-13A [9] D M Dovey. (1963). Heat treatment of metals. Lectures delivered at the Institution of Metallurgists refresher course, 1962. In London, Iliffe. [10] Technical Committee ISO/ TC 119 “Powder metallurgy” (2016). BSI Standards Publication Hardmetals — Metallographic determination of microstructure Part 4: Characterisation of porosity , carbon defects and eta-phase content. Retrieved from https://www.iso.org/ standard/61266.html
[5] Gessinger, G. H. (1984). Powder Metallurgy of Superalloys. https://doi. org/10.1016/C2013-0-06291-3 [6] Torralba, J. M. (n.d.). High Temperature Materials
Powder Injection Moulding International
December 2019
© 2019 Inovar Communications Ltd
Vol. 13 No. 4