Search Results for nickel-base superalloy

Fig. 861 Fatigue fracture of the nickel-base superalloy Udimet 720 tested in a salt environment at 705 °C (1300 °F). Fatigue conditions: 690 MPa (100 ksi) ± 207 MPa (30 ksi) 10,500 cycles to failure. Salt coating: 40% MgSO 4 , 59% Na 2 SO 4 , 1% NaCl. Sample heat treatment: 4 h at 1170 °C More

Fig. 3 The evolution of the processing of nickel-base superalloy turbine blades. (a) From left, equiaxed, directionally solidified, and single-crystal blades. (b) An exposed view of the internal cooling passages of an aircraft turbine blade. Source: Ref 5 More

Fig. 3 Time-temperature transformation diagram for IN-718 nickel-base superalloy. Source: Ref 3 More

Fig. 1 Press conversion of a nickel-base superalloy ingot into a billet with refined microstructure. Courtesy of Allvac ATI More

Fig. 39 Dynamic materials modeling processing map for the nickel-base superalloy Nimonic AP-1. (a) Three-dimensional plot of efficiency of power dissipation as function of temperature and strain rate. (b) The corresponding contour map with numbers representing constant efficiency of power More

Fig. 26 Dynamic material modeling processing map for the nickel-base superalloy Nimonic AP1. (a) Three-dimensional plot of efficiency of power dissipation as a function of temperature and strain rate. (b) The corresponding contour map with numbers representing constant efficiency of power More

Fig. 28 Finished processing map for the nickel-base superalloy Nimonic AP1. Obtained by super-position of instability regions determined with Eq 59 with contours of percent efficiency of power dissipation. Shaded region corresponds to conditions of flow instability. Source: Ref 25 More

Fig. 7 Hot isostatic pressing densification maps for a nickel-base superalloy powder having a particle diameter of 50 µm (2 mils). (a) Density as a function of pressure (pressure expressed as the log of the ratio of applied hydrostatic pressure over flow stress) when processed at constant More

Fig. 10 (a) Freckles in a single-crystal nickel-base superalloy prototype blade. (b) Closeup of a single freckle. The freckles are approximately 2 mm (0.1 in.) in diameter. More

Fig. 5 Recrystallized grains on a nickel-base superalloy after surface deformations due to processes such as grinding. Original magnification: 100× More

Fig. 7 Strength (hardness) versus particle diameter in a nickel-base superalloy. Cutting occurs at low particle diameters, bypassing at higher particle diameters. Note also that aging temperature affects strength in conjunction with particle size. More

Fig. 12 Nitrogen content versus depth for Inconel nickel-base superalloy heated at 815 °C (1500 °F) in nitrogen More

Fig. 13 Strength (hardness) versus particle diameter in a nickel-base superalloy. Cutting occurs at low particle sizes, bypassing at larger sizes. Note that aging temperature also affects strength in conjunction with particle size. More

Fig. 20 Stress-rupture behavior of B-1900 nickel-base superalloy, showing break in slope believed to be caused by γ′ coarsening More

Fig. 11 Fracture surfaces of a nickel-base superalloy turbine blade. (a) Secondary electron image of interdendritic stress-rupture fracture at the trailing edge (TE) of single-crystal turbine blade casting showing creep voids on the fracture surface. (b) Scanning electron microscopy More

Fig. 4 Cross section of a nickel-base superalloy after thermomechanical fatigue testing. Image shows surface oxidation at bottom and oxide spike forming in the center of the specimen. Chemical etchant used highlights aluminum in the microstructure. Microstructure shown as white in image More

Fig. 5 Single-crystal nickel-base superalloy specimens tested at a mechanical strain of 1.3%, a minimum temperature of 550 °C (1020 °F), a maximum temperature of 1050 °C (1920 °F), and 300 s cycles but having different thermomechanical fatigue (TMF) waveforms. (a) Out-of-phase TMF exhibiting More

Fig. 2 Archtypical microstructure of a cross section of a nickel-base superalloy aluminized in a high-activity aluminum pack followed by heat treatment for 4 h at 1080 °C (1975 °F). See source Ref 11 for exact size More

Fig. 3 Archtypical microstructure of the cross section of a nickel-base superalloy aluminized in a low-activity aluminum pack. See source Ref 11 for exact size More

Fig. 14 Auger composition-depth profile of argon-atomized nickel-base superalloy powder. Source: Ref 5 More