Influence of Aging Temperature on the Microstructure and Stress Rupture Property of DZ951 Alloy



Effect of different aging temperatures on microstructure and stress rupture properties of DZ951 alloy were investigated in this paper. The results show that the shape of carbide changed from script-like in as-cast alloy to block during different aging treatments. MC carbide degrades into M23C6 at the aging temperature of 970°C, which made alloy have a better combination of strength and ductility than that at other aging temperatures. The size of γ′ phase increases and the shape of γ′ phase changed from sphere (870°C) to quasi-cuboid (920°C) and cuboid (970°C) with the increasing aging temperature. The stress rupture life of DZ951 alloy at 1100°C/60MPa improves with the increased of aging temperature. The fractographs at different conditions showed a ductile fracture mode.




Yafang Han et al.




P.C. Xia et al., "Influence of Aging Temperature on the Microstructure and Stress Rupture Property of DZ951 Alloy", Materials Science Forum, Vols. 546-549, pp. 1241-1244, 2007


May 2007




[1] M.P. Jackson and R.C. Reed: Mater. Sci. Eng Vol. A259(1999), p.85.

[2] F. Torster, G. Baumeister, J. Albrecht, et al,: Mater. Sci. Eng Vol. A234-236 (1997), p.189.

[3] P. Caron and T. Khan: Mater. Sci. Eng Vol. 61(1983), p.173.

[4] P.K. Footner and B.P. Richards: J. Mater. Sci Vol. 17(1982), p.2141.

[5] A. Ges, O. Fornaro and H. Palacio: J. Mater. Sci Vol. 32(1997), p.3687.

[6] A. Baladan: J. Mater. Sci Vol. 37(2002), p.2379.

[7] E. Balikci, A. Raman and R.A. Mirshams: Metall. Mater. Trans. A Vol. 28A (1997), p. (1993).

[8] E.H. Vandermolen and J.M. Oblak: Metall. Trans Vol. 2(1971), p.1627.

[9] H. Monajati, M. Jahazi, R. Bahrami and S. Yue: Mater. Sci. Eng Vol. A373(2004), p.286.

[10] C.B. Xiao, Y.F. Han, et al.: Trans. Nonfer. Met. Soc. China Vol. 12(2002), p.656.

[11] M. Barry and J.W. Martin: Z. Metallkd Vol. 72(1981), p.538.

[12] L.Z. He, Q. Zheng, X.F. Sun, H.R. Guan, et al.: Mater. Sci. Eng Vol. A398(2005), p.128.

[13] A. Jena: J. Mater. Sci Vol. 19(1984), p.3121.

[14] T. Malow, J.W. Zhu and R.P. Wahi: Z. Metallkd Vol. 85(1994), p.9.

[15] J.J. Jackson, M.J. Donachie, R.J. Henricks and M. Gell: Metall. Trans. A Vol. 8A (1977), p.1615.

[16] W.H. Jiang, H.R. Guan and Z.Q. Hu: Mater. Sci. Eng Vol. A271(1999), p.101.

[17] S.M. Copley and B.H. Kear: Trans. Met. Soc. AIME Vol. 239(1967), p.984.

[18] H. Gleiter and E. Hornbogen: Phys. Stat. Solidi Vol. 12(1965), p.251.