DEVELOPMENT OF A FABRICABLE GAMMA-PRIME (γ') STRENGTHENED SUPERALLOY
By L. M. Pike. 2008
144 citations recorded by the source corpus.
A recently developed wrought γ'-strengthened superalloy, HAYNES® 282® alloy, is introduced. The new alloy is a candidate for several high-temperature applications in both aero and land-based gas turbine engines. It is also being considered for aerospace structural components, as well as automotive and steam turbine applications. The metallurgical features of the new alloy are reported, and the relationship between these features and certain key properties of the alloy is discussed. It was found that carefully balancing the equilibrium amount of the γ' phase was crucial for producing an alloy which could be readily formed and welded, and yet still maintain exceptional creep strength. Too high levels of the γ' phase can lead to difficulties in fabrication, particularly the phenomenon of strain-age cracking. However, a certain amount of γ' is necessary for adequate creep, tensile, and fatigue strength. The γ' level in 282 alloy was optimized to achieve the best balance of strength and fabricability. Alloy properties such as creep, tensile, low-cycle fatigue, and thermal stability were presented for 282 alloy along with those of comparative alloys, R-41 alloy, Waspaloy alloy, and 263 alloy. The fact that 282 alloy was found to have equivalent or better mechanical properties compared to alloys with higher γ' content can be attributed in large part to the alloy's outstanding thermal stability.
Subfields: Biomedical Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/52ef0c06320c03480493a1060a22c30f7d2d9f67
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In Biomedical Engineering
In Mechanical Engineering
Citations in the corpus
- Influence of heat treatment on the microstructure and tensile properties of Ni-base superalloy Haynes 282 (2017, methodology): “The presence of g ́ after the 1010 °C step indicates that the solvus temperature might be slightly higher than reported previously for Haynes 282 [14, 24] and that obtained from JMatPro simulations (1003 °C).”