Deformation and recrystallization of single crystal nickel-based superalloys during investment casting

Experimental and modeling study of compressive creep in 3D-woven Ni-based superalloys

“…where and are the plastic and creep strain increments, respectively. In this work, the creep deformation behavior was only considered, and the effect of plastic deformation is neglected, which is justified by the applied stresses (200 MPa) being well below the yield stresses of Ni-based superalloys with similar compositions (∼500-800 MPa) [ [25], [26], [27], [28]]. The creep strain increment is obtained from the above equation 4, and consequently, the stress increment is given by:…”

Phase composition of Ni-Al-Co-Me-based superalloy modified by deformation

“…After compressive deformation the alloys obtain the polycrystalline structure with non-equilibrium morphology [13][14][15][16][17]. Nevertheless, ' I -phase particles are present in the structure, however, their volume fraction and the size is rather reduced as compared to the original state (directional crystallization) ( Table 3).…”

A study of low cycle fatigue life and its correlation with microstructural parameters in IN713C nickel based superalloy

“…This method enables the manufacturing of complex component geometry at a relatively low cost and provides minimum material defects. However, due to the different cooling rates throughout the mould thickness the resultant microstructure may not be uniform and contain pores [3][4][5]8,13,[16][17][18]. The typical microstructure of the turbine wheel generated via investment casting consists of large columnar grains along the blades, very fine equiaxed grains located at the blade tips with a transition region between the two regions.…”

“…The TCP phases have different crystal structures than the matrix and more complex morphology, like tessellated layers of arrays stacked into a polyhedral coordination, i.e., hexagons, pentagons or triangles, with a high and uniform packing density of atoms. They are also detrimental because of the strengthening elements depletion from the γ phase, such as Mo and Cr, becoming a probable crack initiation site during cyclic loading [4,[6][7][8]13,[17][18][19][20][21][22][23].…”