Journal of Aeronautical Engineering

Journal of Aeronautical Engineering

Experimental analysis of strength of coated nickel base superalloy Rene-80

Document Type : Original Article

Authors
Mehrdad Karimi 1
Mostafa Livani 2
Hamidreza Zarei
1 Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
2 Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
10.22034/joae.2020.131998
Abstract
In this paper, static strength analysis of superalloy Rene-80 is studied experimentally in both of the coated and uncoated cases. Superalloy Rene-80 is widely used in manufacturing aircraft turbine blades. The service temperature of this alloy is in the range of 760–982 °C. Although this superalloy has good mechanical properties and acceptable protection against oxidation and hot corrosion, it is coated to improve its resistance to surface degradation factors such as oxidation, hot corrosion and erosion at high temperatures. In this paper, penetrating aluminide coatings were applied to this superalloy with two separate methods of penetration-powder and penetration-slurry, respectively, under the brand names Codep-B and IP1041slurry, respectively and the effect of these coatings on the tensile properties of Rene-80 under ehe temperature range of 25-982 ° C was investigated. For this purpose, the samples according to ASTM-E8 standard are produced and after coating (the two methods mentioned above) along with uncoated samples are carried out a tensile testing in accordance with the ASTM-E21 standard.
The results of the present study showed that at low operating temperatures, uncoated samples have better tensile strength than coated samples, but this behavior is reversed at high operating temperatures, which indicates the importance of using nickel-based superalloy coatings for extreme heat environments. Also, the model with IP1041slurry coating at high operating temperature has better yield and ultimate strengths than powder penetration coating.
Keywords
Turbine blades
superalloy
slurry penetration coating
powder penetration coating
tensile
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Journal of Aeronautical Engineering
Volume 22, Issue 2
December 2020
Pages 56-65

  • Receive Date 16 June 2021