Hot Isostatic Pressing Improves the Quality of the Blades from Nickel Base Superalloys for Turbine Engines

Abstract:

Typical defects of the cast engine blades from Ni base superalloys in the as-cast state and after long operation were investigated: the cast porosity, internal and external microcracs. The initial cast porosity and voids, which have appeared during long operation, reduce the fatigue and other service characteristics of the blades from Ni base superalloys. Hot isostatic pressing (HIP) reduces the size and number of micropores in the cast blades from Ni base superalloys with a polycrystalline (alloy GS6U) and single crystal (alloy GS32) structures. As a result, HIP improves the mechanical properties of the blades. Application of the HIP, together with the standard heat treatment in the renovation of the blades after long operation can provide a virtually complete restoration of their structure and efficiency.

• Periodical: Advanced Materials Research (Volume 278)
• Pages: 295-300
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.278.295
• Online since: July 2011
• Authors: Igor M. Razumovskii, Albert A. Tikhonov, S.F. Marinin, A.V. Logunov, A.G. Beresnev
• Keywords: Hot Isostatic Pressing (HIP), Porosity, Superalloy

References

[1] J. -L. Strudel. Mechanical properties of multiphase alloys. In: Physical metallurgy, Ed. by R.W. Cahn and P. Haasen, vol. III, the Netherlands, Elsevier Science (1996) p.2147.

[2] B.A. Kolachev, V.I. Elagin and V.I. Livanov. Metallovedenie i termicheskaya obrabotka cvetnyh metallov i splavov. Moscow: MISIS (2005) 328 p.

[3] I.M. Lifshitz, V.V. Slyozov. J. Phys. Chem. Solids 19 (1961) 35.

[4] C. Wagner. Z. Elektrochemie 65 (1961) 581.

[5] Q.Z. Chen, N. Jones, D.M. Knowles. Acta Materialia 50 (2002) 1095.

[6] A.V. Logunov, V.I. Golovanov, I.M. Razumovskii, S.F. Marinin, A.A. Tikhonov, V.A. Poklad, V.S. Frolov, Y.G. Bykov. Perspectivnye materialy 3 (2004) 12.

[7] S.F. Marinin, A.A. Tikhonov, A.A. Logunov, I.M. Razumovskii, V.I. Golovanov. Proc. 4d Moscow Int. Conf. on Teoriya i praktika tehnology proizvodstva izdely iz kompozicionnyh i novyh metallicheskih materialov,. Moscow, Znanie (2006) 388.

[8] A.A. Tikhonov, S.F. Marinin, A.V. Logunov, I.M. Razumovskii, A.I. Vinogradov, V.A. Kochetkov. Proc. 5th Moscow Int. Conf. on Teoriya i praktika tehnology proizvodstva izdely iz kompozicionnyh i novyh metallicheskih materialov,. Moscow, Znanie (2008).

[9] S.Z. Bokstein, S.S. Ginzburg, S.T. Kishkin, I.M. Razumovskii, G.B. Stroganov. Avtoradiografiya poverkhnostei razdela i strukturnaya stabil'nost' splavov (Autoradiography of interphases and structural stability of alloys). Moscow: Metallyrgiya (1987).

[10] Enciklopediya Mashinostroenie". V. II-3 "Tsvetnye metally i splavy. Kompozicionnye metallicheskie materialy,. Moscow: Mashinostroenie (2001) 536.