Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-19T06:25:23.537Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructural Rejuvenation Through Non-conventional Heat Treatments of an Inconel 939 Superalloy

Published online by Cambridge University Press:  31 January 2012

M. A. González ,
D. I. Martínez ,
A. Pérez  and
H. Guajardo
M. A. González*
Affiliation:
Facultad de Ingeniería Mecánica y Eléctrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolás de los Garza, N.L., México.
D. I. Martínez
Affiliation:
Facultad de Ingeniería Mecánica y Eléctrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolás de los Garza, N.L., México.
A. Pérez
Affiliation:
Facultad de Ingeniería Mecánica y Eléctrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolás de los Garza, N.L., México.
H. Guajardo
Affiliation:
FRISA Aerospace, S.A. de C.V., Valentín G. Rivero No. 200, Col. Los Treviño, C.P. 66150, Santa Catarina N.L., México.
*
*E-mail: [email protected]
Get access

Abstract

The microstructural rejuvenation through non-conventional heat treatments (NCHT) of a conventional cast superalloy Inconel 939 was investigated. The primary and secondary main constituents of the NCHT microstructures were characterized through its morphology and composition applying conventional microscopy and analytical scanning electron microscope (SEM). The results showed a complete rejuvenation of the overage microstructure (disordered coarse cuboids of 1.2μm from γ´, continuous films of M23C6 carbides and coarse MC carbides as well as γ-γ´eutectics) into a more homogeneous microstructure; spherical ordered primary γ´ and secondary γ´ precipitates ranging between 357 to 442 nm and 30 to50 nm respectively and depending on the applied heat treatment. Also blocky type MC and discreet M23C6 carbides dispersed within the dendrite and in the interdendritic regions were observed. There was no evidence of the formation of detrimental phases with the NCHT, which can affect the long-term properties of the alloy during service.

Keywords

MicrostructureGrain boundariesScanning Electron Microscopy (SEM)Second phasesNialloy
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1372: Symposium S3 – Structural and Chemical Characterization of Metal Alloys and Compounds—2011 , 2012 , imrc-1372-s3-24
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Shaw, S.W.K., Superalloys, 275 (1980).Google Scholar
2. Delargy, K.M., Shaw, S.W.K. and Smith, G.D.W., Mater. Sci. and Technol. 2, 1031 (1986).Google Scholar
3. Miskovic, Z., Jovanovic, M., Gligic, M. and Lukic, B., Vacumm 43, 709 (1992).Google Scholar
4. Hammond, C. and Nutting, J., Met. Sci., 474 (1977).Google Scholar
5. González, M.A., Martínez, D.I., Pérez, A. and Garza, A., FIME-UANL, Mater. Res. Soc. Symp. P, 1275 (2010).Google Scholar
6. Lvov, G., Levit, V.I., and Kaufman, M.J., Metall. Mater. Trans. A, 35A, 1669 (2004).Google Scholar
7. Wangyao, P., Krongtong, V., Homkrajai, W., Panich, N., and Lothongkum, G., JOM-J. Min. Met. Mat. S. 17, 87 (2007).Google Scholar
8. Tillack, Donald J., Manning, James M. and Hensley, J.R., Heat Treating of Nonferrous Alloys, (ASM Metals Handbook, 1991) pp. 907.Google Scholar
9. Krongtong, V., Tuengsook, P., Homkrajai, W., Nisaratanapor, E. and Wangyao, P., Acta Metall. Slov. 11, 171 (2005).Google Scholar
10. Wangyao, P., Chuankrerkkul, N., Polsilapa, S., Sopon, P. and Homkrajai, W., J. Sci. 36(3), 312 (2009).Google Scholar
11. Brooks, R., Heat Treatment, Structure and Properties of Nonferrous Alloys, (American Society for Metals, Ohio, 1982) pp. 139.Google Scholar
12. Hatala, W. and Schirra, J., Superalloys, 137 (1996).Google Scholar
13. Sajjadi, S.A., Elahifar, H.R. and Farhangi, H., J. Alloy. Compd. 455, 215 (2008).Google Scholar
14. Wangyao, P., Zrnik, J., Mamuzic, I, Polsilapa, S., Klaijumrang, S., Metalurgija 46, 195 (2007).Google Scholar
15. Sajjadi, S.A., Zebarjad, S.M., Guthrie, R.I.L. and Isac, M., J. Mater. Process. Tech. 175, 376 (2006).Google Scholar
16. Decker, R.F., Paul, D. Merica Research Laboratory, Steel Strengthening Mechanism Symposium, 1 (1969).Google Scholar
17. Nembach, E., Schanzer, S., Schorer, W. and Trinckauf, K., Acta Metall. 36, 1471 (1988).Google Scholar