Tensile Properties of a Low-Cost First Generation Single Crystal Superalloy DD16

Abstract:

The tensile properties of a low-cost first generation single crystal superalloy DD16 have been investigated. The results show that values of the tensile strength and yield strength of DD16 alloy were similar at typical temperatures; from room temperature to 760, the yield strength of DD16 alloy increases; However, above 760, the yield strength of DD16 alloy decreases remarkably, and the maximum of the yield strength was 1145.5MPa at 760. From room temperature to 760, the fracture mode was cleavage fracture; But above 760, the fracture characteristics changed from cleavage to dimple.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 478-482
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.478
• Online since: February 2013
• Authors: Jian Wei Xu, Yun Song Zhao, Ding Zhong Tang
• Keywords: DD16, Single Crystal Superalloy, Tensile Properties, Yield Strength

References

[1] T. Pollock, S. Tin, Nickel-based superalloys for advanced turbine engines: Chemistry, microstructure, and properties, Journal of propulsion and power. 22(2) (2006) 361-374.

DOI: 10.2514/1.18239

[2] E.W. Ross, K.S. O'Hara, Rene N4: a first generation single crystal turbine airfoil alloy with improved oxidation resistance, low angle boundary strength and superior long time rupture strength. Superalloys 1996. Champion, PA, 1996, pp.19-25.

DOI: 10.7449/1996/superalloys_1996_19_25

[3] W.S. Walston, K.S. O'Hara, E.W. Ross, et al., René N6: Third generation single crystal superalloy. Superalloys 1996. Warrendale, PA, 1996, pp.27-34.

DOI: 10.7449/1996/superalloys_1996_27_34

[4] L. Zheng, S.S. Li, C.B. Xiao, et al., Microstructure and high temperature stress rupture properties of Ru-containing directionally solidified Ni-based superalloy, Key Engineering Materials. (2007) 507-510.

DOI: 10.4028/www.scientific.net/kem.353-358.507

[5] S.G. Tian., M.G. Wang, H.C. Yu, et al., Influence of element Re on lattice misfits and stress rupture properties of single crystal nickel-based superalloys, Materials Science and Engineering A. 527(Compendex) (2010) 4458-4465.

DOI: 10.1016/j.msea.2010.03.107

[6] G. Fuchs, Improvement of creep strength of a third generation single-crystal Ni-based superalloy by solution heat treatment, Journal of Materials Engineering and Performance. 11(1) (2002) 19-25.

DOI: 10.1007/s11665-002-0003-5

[7] J. Zhang, Y.S. Luo, Y.S. Zhao, et al., The research of microstructure and property of a low density Ni-based single-crystal superalloy, Journal of Aeronauticcal Materials. 31(S1) (2011) 90-93.