Mechanical Behavior of As-Cast and High Temperature Exposed Ni-Base Superalloy B1900


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Microstructural evolution during high temperature exposure and its effects on tensile and stress rupture properties of the Ni-base superalloy B1900 have been studied. Tensile deformation of the as-cast specimen was concentrated in the localized slip bands in general. Stacking faults and deformation twins were observed in the as-cast tensile specimen tested at 871°C where the alloy exhibited the lowest ductility. Dense dislocation network formed at γ/γ´ interface during thermal exposure caused homogenous deformation in the thermally exposed tensile specimen. Thermal exposure did not have significant effect on the stress rupture lives of the alloy at 760°C and at and above 871°C but it reduced stress rupture life of the alloy at 816°C γ´ coarsening and coherency loss at the γ/γ´ interface during thermal exposure were primarily responsible for the deterioration of mechanical properties and characteristic deformation behavior of the alloy.



Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi




I.S. Kim et al., "Mechanical Behavior of As-Cast and High Temperature Exposed Ni-Base Superalloy B1900", Materials Science Forum, Vols. 449-452, pp. 541-544, 2004

Online since:

March 2004




[1] Z. P. Luo, Z. T. Wu, and D. J. Miller: Mater. Sci. & Eng. A, Vol. A354 (2003), p.358.

[2] T. Link and M. Feller-Kniepmeier: Met. Trans. A Vol. 23A (1992), p.99.

[3] M. Feller-Kniepmeier, T. Link, I. Poschmann, G. Scheunemann-Frerker and C. Schulze: Acta mater. Vol. 44, No. 6 (1996), p.2397.

[4] S. Nategh, S. A. Sajjadi: Mater. Sci. & Eng. A Vol. A339 (2003), p.103.

[5] P. Henderson, L. Berglin, and C. Jansson: Scripta Mater. Vol. 40, No. 2 (1999), p.229.

[6] A. Epishin, T. Link, P. D. Portella and U. Bruckner: Acta mater. Vol. 48 (2000), p.4169.

[7] R. C. Reed, N. Matan, D. C. Cox, M. A. Rist, and C. M. F. Rae: Acta mater. Vol. 47, No. 12 (1999), p.3367.

[8] T. Sugui, Z. Huihua, Z. Jingha, Y. Hongcai, X. Yongbo and H. Zhuangqi: Mater. Sci. & Eng. A Vol. A279 (2000), p.160.

[9] D. M. Knolwes and Q. Z. Chen: Mater. Sci. & Eng. A Vol. A340 (2003), p.88.

[10] A. F. Giamei, D. D. Pearson and D. L. Anton: High Temperature Ordered Intermetallic Alloys, edited by C. C. Koch et al., Mat. Res. Soc. Symp. Proc., Vol. 39 (Pittsburgh, PA, 1985), p.293.

[11] F. R. N. Nabarro: Met. Trans. A Vol. 27A (1996), p.513.

[12] Y. J. Buffiere and M. Ignat: Acta mater. Vol. 43 (1995), p.1791.