Effect of Carbon on the Microstructural Evolution and Thermal Fatigue Behavior of a Ni-Base Superalloy

Abstract:

The effect of carbon content on the microstructural evolution and thermal fatigue behavior of Ni-Cr-Fe-Mo alloy with different carbon content was carried out at temperature ranging from 20°C to 920°C. The microstructure evolution was detected and the length of thermal fatigue cracks was measured. The results revealed that all the alloys are mainly composed of γ phase and carbides. With the increase of carbon content, the volume fraction of carbides increase and the morphology varies from blocky to script-like and sheet-like. The microstructural features exert influence on the thermal fatigue cracks of the alloys with different carbon content. Considering the thermal fatigue properties, the optimum carbon content of the Ni-Cr-Fe-Mo alloy superalloy should be below 0.08wt.%.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 497-502
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.497
• Online since: March 2016
• Authors: Ning An, Yang An, Qiang Fan, Zu Ming Fu, Zhen Rui Li, Yong Yue Zhang
• Keywords: Carbide, Microstructure, Nickel-Based Superalloys, Thermal Fatigue Behavior

References

[1] C R Brinkman, P L Rittenhouse, W R Corwin, et al. Application of Hastelloy X in gas-cooled reactor systems. Technical Report. Oak Ridge National Laboratory, (1976).

DOI: 10.2172/7347624

[2] J P Pedron, A Pineau. The effect of microstructure and environment on the crack growth behavior of Inconel 718 alloy at 650°C under fatigue, creep and combined loading [J]. Materials science and engineering, 1982, 56 (2): 143.

DOI: 10.1016/0025-5416(82)90167-7

[3] M Reger, L Remy. High temperature, low cycle fatigue of IN-100 superalloy: Influence of temperature on the low cycle fatigue behavior [J]. Materials Science and Engineering: A, 1988, 101A: 47.

DOI: 10.1016/0921-5093(88)90049-4

[4] B Baufeld, E Tzimas, H Mullejans, et al. Thermal-mechanical fatigue of Mar-M509 with a thermal barrier coating[J]. Materials Science and Engineering: A, 2001, 315 (1-2): 47.

DOI: 10.1016/s0921-5093(01)01208-4

[5] D A Woodford. and D F Mowbray. Effect of material characteristics and test variables on thermal fatigue of cast superalloys[J]. Materials science and engineering, 1974, 16(1/2): 5.

DOI: 10.1016/0025-5416(74)90135-9

[6] J Reuchet, L Remy. High temperature low cycle fatigue MAR-M509 superalloy I: The influence of temperature on the low cycle fatigue behavior from 20°C to 1100°C, Materials science and engineering, 1983, 58 (1): 19.

DOI: 10.1016/0025-5416(83)90134-9

[7] J X Yang, Q Zheng, et al. Thermal fatigue behavior of K465 superalloy[J]. Rare Metals, 2006, 25(3): 202-209.

DOI: 10.1016/s1001-0521(06)60040-5

[8] J –C Zhao, M Larsen, V Ravikumar. Phase precipitation and time–temperature-transformation diagram of Hastelloy X [J]. Materials Science and Engineering A, 2000, 293: 112-119.

DOI: 10.1016/s0921-5093(00)01049-2