Research on Effect of Alloy Elements on Equilibrium and Properties of Ni-Cr-Co Type Nickel-Based Superalloy

Abstract:

Ni-Cr-Co type Nickel-based super alloy Inconel 740H was studied. The effect of Nb, Al and Ti on the equilibrium of this alloy was analyzed by JMatPro software. The amount of Ti and Nb should be controlled by 1.50wt.%, and meanwhile, Al should be 1.0-2.0wt.%. If Mo and W were added the amount of Mo should be in the range of 1.0-2.0wt. %, and W should be about 1.0wt.%. Based on these results, three types of new alloys were designed, which contain Ni-Cr-Co-Mo type (1#), Ni-Cr-Co-W type (2#) and Ni-Cr-Co-Mo-W type (3#). Compared with the Ni-Cr-Co type Inconel 740H alloy, the room temperature strength, high temperature strength and high temperature durable performance of the three new alloys improved, which can provide the evidence and reference to optimize the chemical composition of Inconel 740H alloy, i.e., adding 1.50wt.% Mo and 1.0wt.% W individually or together.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 513-519
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.513
• Online since: March 2016
• Authors: Qing Quan Zhang*, Ming Yang Li, Ran Wei, Hui Yun Wu, Zhen Rui Li
• Keywords: Equilibrium, High Temperature Strength, Nickel-Based Super Alloy, Nickel-Based Superalloys

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