OJSC “Kompozit”

A. G. Beresnev, General Director, e-mail: info@kompozit-mv.ru

I. M. Razumovskiy, Chief Scientist

Institute of New Metallurgical Technologies, OJSC “Kompozit”

S. F. Marinin, Head of Laboratory
A. A. Tikhonov, Chief Scientist
V. N. Butrim, Director

A concept for diffusion dissolution of the shrinkage porosity in the single crystalline blades from Ni-base superalloys is developed. It allows one to minimize plastic deformation under HIP and deter from recrystallization. It is assumed that a vacancy-controlled mechanism of the pores dissolution can be realized when the vacancies can reach the open surface of the blade under HIP. In such a case the diffusion path of vacancies in the microstructure has to be equal to the cross section of the upper part of the blade. The effect of structural defects and pressure on diffusion of vacancies is estimated. An approach developed is applied to design of the two-step regime of HIP for single crystalline blades from Ni-base superalloy GS32. The two-step HIP enshures densification of the blades without recrystallization and improves performance. First step of HIP is carried out at temperature lower than temperature of solves for γ′-phase (T_sol), i. e. in two-phase γ-γ'-field, when a great impediment for the plastic deformation exists. Second step of HIP is carried out near T_sol, where the rest pores are filled with the material by means of the local plastic deformation. The two-step regime of HIP under consideration increases the value of time-to-rupture for Ni-base superalloy GS32 at temperature 1000 ^оС under 245 МPа from 167 (without HIP) hours to 213 hours; the high-cycle fatigue at room temperatures increases from 147 до 186–206 МPа.

1. Liteynye lopatki gazoturbinnykh dvigateley : sb. Pod red. E. N. Kablova (Foundry Blades of the Gas-turbine Engines : collected articles. Ed. E. N. Kablov). Moscow, 2001. 632 p.
2. Shalin R. E., Svetlov I. L., Kachanov E. B., Tolorayya V. N., Gavrilov O. S. Monokristally nikelevykh zharoprochnykh splavov (Single Crystals of Nickel Heat-resisting Alloys). Moscow, 1997. 336 p.
3. Epishin A., Link T., Nazmy M., Staubli M., Klingelhoffer H., Nolze G. Superalloys 2008. The Minerals, Metals and Materials Society, Champion, Pennsylvania, USA, 2008. pp. 725–731.
4. Padalko A. G. Praktika goryachego izostaticheskogo pressovaniya neorganicheskikh materialov (Practice of the Hot Isostatic Pressing of Inorganic Materials). Moscow, 2007. 267 p.
5. Logunov A. V., Marinin S. F., Poklad V. A., Razumovskiy I. M. Tekhnologiya legkikh splavov — Technology of Light Alloys. 2005. No. 1–4. pp. 71–77.
6. Logunov A. V., Tikhonov A. A., Marinin S. F., Beresnev A. G., Razumovskiy I. M., Shmotin Yu. N., Vinogradov A. I., Novikov A. S., Vertiy K. B. Materialovedenie — Materials Science. 2011. No. 3. pp. 38–45.
7. Golovanov V. I., Larionov V. N., Logunov A. V., Marinin S. F., Poklad V. A., Razumovskii I. M., Tikhonov A. A. Proc. of the 2005 International Conference on Hot Isostatic Pressing. Paris, 2005. pp. 199–203.
8. Humphreys F. G., Hatherly M. Recrystallization and Related Annealing Phenomena. New York : Pergamon, Press, 1996.
9. Lindsly B., Pierron X. The Minerals, Metals and Materials Society. 2000. pp. 59–68.
10. Bond S. D., Martin J. W. Mater. Sci. 1984. Vol. 19, pp. 3867–3872.

11. Khan T., Caron P., Nakagawa Y. G. J. Metals. 1986. No. 7. pp. 16–19.
12. Paul U., Sahm P. R., Goldschidt D. Mater. Sci. and Engineering A. 1993. Vol. 173. pp. 49–54.
13. Patent 5413648 US. Preparation of Single Crystal Superalloys for Post-Casting Heat Treatment. Salkeld R. W., Field T. T., Ault E. A. ; Published 09.05.1995.
14. Burgel R., Portella P. D., Preuhs J. The Minerals, Metals and Materials Society. 2000. pp. 229–238.
15. Patent 5573609 US. Hot isostatic pressing of single crystal superalloy articles. Fritzemeier L. G. ; Published 12.11.1996.
16. Patent 4743312 US. Method for presenting recrystallization during hot isostatic pressing. Eridon J. M., Dalal R. P. ; Published 10.05.1988.
17. Bokshteyn S. Z., Ginzburg S. S., Kishkin S. T., Razumovskiy I. M., Stroganov G. B. Avtoradiografiya poverkhnostey razdela i strukturnaya stabilnost splavov (Autoradiography of the Boundary Surfaces and Structural Stability of Alloys). Moscow, 1987. 272 p.
18. Lifshits I. M., Slezov V. V. Zhurnal eksperimentalnoy i teoreticheskoy fiziki - Journal of Experimental and Theoretical Physics. 1958. Vol. 35, No. 2. pp. 479–492.
19. Bokshteyn S. Z., Bolberova E. V., Kishkin S. T., Kostyukova E. P., Mishin Yu. M., Razumovskiy I. M. Fizika metallov i metallovedenie — Physics of Metals and Metal Science. 1984. Vol. 58, No. 1. pp. 189–191.
20. Bokshteyn S. Z., Ginzburg S. S., Kishkin S. T., Razumovskiy I. M. Poverkhnost. Fizika, khimiya, mekhanika — Surface. Physics, chemistry, mechanics. 1984. No. 1. pp. 5–19.
21. Patent 2380454 RF. Sposob obrabotki otlivok s monokristallicheskoy strukturoy iz zharoprochnykh nikelevykh splavov goryachim izostaticheskim pressovaniem (Method of treatment of the heat-resisting nickel alloys castings with a single-crystal structure by the hot isostatic pressing). Tikhonov A. A., Marinin S. F., Razumovskiy I. M., Logunov A. V., Krylov V. N., Vinogradov A. I., Kochetkov V. A., Novikov A. S., Vertiy K. B. ; Asserted 11.06.2008; Published 27.01.2010, Bulletin No. 3.
22. Razumovskii I. M., Ruban A. V., Razumovskii V. I., Logunov A. V., Larionov V. N., Ospennikova O. G., Poklad V. A., Johansson B. Mater. Sci. and Engineering A. 2008. Vol. 497. pp. 18–24.