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Study of influence of gamma prime and eta phases on corrosion behaviour of A286 superalloy by using electrochemical potentiokinetic techniques

“…The cellular η phase precipitation at GBs may be detrimental to the mechanical properties as evidenced by several authors: De Cicco et al [10] showed that degrades the creep behaviour; Brooks and Thompson [11] demonstrated that gives rise to the increase in intergranular fracture in the tensile test; Guo et al [12] reported that aggravates the hydrogen embrittlement sensitivity because the η phase/matrix interface is incoherent and, consequently, more prone to accumulate hydrogen during the plastic deformation, which enhances de-cohesion and, hence, leads to fracture; and, Rho et al [13] pointed out that, since provides the site for the GB cavitation which promotes the intergranular failures, induces the decrease in fatigue life. Conversely, Li et al [8] showed that the cellular η phase improves the high temperature ductility because its precipitation at GBs causes the replacement of primary relatively smooth GBs by new jagged GBs, which can restrain GB sliding and cracking during high temperature deformation.…”

Effect of Temperature and Strain Amplitude on Dislocation Structure of M963 Superalloy during High-Temperature Low Cycle Fatigue

“…Since these components are always subjected to repeated thermal stresses, high temperature low cycle fatigue failure is the major factor affecting the service life of the turbine blades. Extensive works have been done on some superalloys in order to reveal the relationship between the cyclic frequency, [1][2][3][4] stain rate, [5][6][7][8] waveform, 9) strain range, [10][11][12] hold period, [13][14][15][16] predeformation, 17,18) environment 4,[19][20][21] and temperature 7,[22][23][24][25] on the cyclic stress response, deformation mode and fatigue life during high temperature low cyclic fatigue. It can be realized that the temperature-and timedependent processes may often be associated with a substantial reduction in the fatigue life because of increasing temperature, decreasing cyclic frequency, or the introduction of hold period and predeformation.…”

Microstructural and mechanical characterization of powder-pack boronized Incoloy A286 superalloy

“…The Incoloy A286 superalloy is an austenitic ironnickel based superalloy which is widely used in superchargers, gas turbine jet engines and hydrogen service thanks to its excellent corrosion resistance and high strength at elevated temperature [5][6][7][8][9][10]. The yield strength of Incoloy A286 varies of 650-800 MPa.…”