Fig. 2 Scanning electron microscope backscattered electron images showing comparison of (a) spray compacted plus hot worked and (b) hot isostatically pressed plus hot worked cold working HATS containing 2.9% C, 8% Cr, 1.5% Mo, and 10% V More

Fig. 4 Scanning electron microscope backscattered electron images of microstructure of a HSS containing 1.55% C, 4% Cr, 12% W, 5% V, and 5% Co. (a–c) Spray compacted and hot worked. (d–f) Hot isostatically pressed and hot worked. (a) and (d) As annealed. (b) and (e) Austenitized at 1220 °C More

Fig. 3 Scanning electron micrograph (backscattered electron image) showing the deposits and corrosion scales formed on a carbon steel superheater tube suffering a severe tube wall wastage. Chemical compositions at different locations were analyzed by energy dispersive x-ray analysis More

Fig. 26 Scanning electron microscope backscattered electron images of investment cast Ti-46Al-8Nb-1B test bars with 30 mm (1.18 in.) diam. Source: Ref 57 More

Fig. 3 Scanning electron microscopy backscattered electron images of Ti64 samples that were deposited via the LENS system using hatch widths of (a) 0.89 mm (0.035 in.), (b) 1.5 mm (0.06 in.), and (c) 2.0 mm (0.08 in.). The images show three different-sized scales of engineered porosities More

Fig. 45 Scanning electron microscope backscattered electron image of area within Fig. 44 , showing points identified for detailed energy-dispersive spectroscopy analysis More

Fig. 45 SEM backscattered electron image of area within Fig. 44 , showing points identified for detailed EDS analysis More

Fig. 12 Backscattered electron image of a 200 μm NiCoCrAlYRe coating on an IN-738 turbine blade after annealing at 1050 °C (1920 °F) for 1300 h ( Ref 17 ). Etched in 1% chromic acid solution at 5 Vdc. Shorthand for the microstructure is γ + β + α < γ + α < γ > γ + γ′. More

Fig. 13 Backscattered electron image of a 200 μm NiCoCrAlYRe coating on an IN-738 turbine blade after annealing at 940 °C (1725 °F) for 9720 h ( Ref 17 ). Etched in 1% chromic acid solution at 5 Vdc. Shorthand for the microstructure is γ + β + α + σ < γ + β + σ < γ + γ′ + α | γ + γ′ + α More

Fig. 14 Backscattered electron image of a Si/50Co + 50Ni diffusion couple heated at 800 °C (1470 °F) for 400 h ( Ref 18 ). Shorthand for the microstructure is Si < NiSi 2 < NiSi < Co(Ni) < CoSi(Ni) + (Co x Ni 1− x ) 2 Si | CoSi(Ni) + (Co x Ni 1− x ) 2 Si > (Co x Ni 1− x More

Fig. 15 Backscattered electron image of a Pt/SiC couple after annealing at 700 °C (1290 °F) for 25 h ( Ref 19 ). The patterned structure of alternating layers of Pt 7 Si 3 and carbon is unusual and thought to be caused by the Kirkendall effect. More

Fig. 8 Backscattered electron image showing atomic number contrast in as-cast Cu-Al-Mg alloy. Brightest areas represent phases containing the greatest concentration of high atomic number copper. Darker areas represent phases of progressively lower average atomic number. Courtesy of Joe Michael More

Fig. 9 Backscattered electron image of 82%Au-15.5%Ni-1.75%V-0.75%Mo active braze alloy joined to Mo-Al 2 O 3 cermet. Accompanying x-ray spectrum obtained from area 1 shows the phase forming at the interface to be rich in nickel and vanadium. Courtesy of Bonnie McKenzie, Sandia National More

Fig. 41 Backscattered electron image of the AuAl 2 + 5 wt% Fe alloy. Iron is in solid solution in the matrix phase (74Au-21Al-5Fe), lowering the gold content in the AuAl 2 phase. The secondary phase consists of a eutectic mixture of AuAl and Au 2 Al, with gold contents between 89 to 93 wt%. More

Fig. 42 Backscattered electron image of the AuAl 2 + 5 wt% Cr alloy. In the matrix (76.5Au-20.5Al-3Cr), the chromium has replaced some of the gold in the previous purple AuAl 2 phase. The secondary white phase appears to be a mixture of gold-rich intermetallic compounds (AuAl, Au 2 Al, Au 4 More

Fig. 43 Backscattered electron image of the AuAl 2 + 5 wt% Mo alloy. The ternary alloying element (molybdenum) can mainly be found in the secondary black phase, and the matrix consists of the purple AuAl 2 phase (dark gray). The secondary white phase consists of gold-rich intermetallic More

Fig. 44 Backscattered electron image of 50AuAl 2 -50RuAl alloy. The white phase consists of ∼6.4Al-92.5Au, the light-gray phase of ∼12.2Al-87.8Ru, the gray phase of ∼10.6Al-89.3Au, and the dark-gray phase of ∼35.1Al-64.5Ru. More

Fig. 45 Backscattered electron image of 70AuAl 2 -30RuAl alloy. The white phase consists of ∼6.8Al-93.2Au, the light-gray phase of ∼12.2Al-87.8Ru, the gray phase of ∼21.7Al-76.6Au, and the dark-gray phase of ∼35.8Al-63.9Ru. More

Fig. 46 Backscattered electron image of 90AuAl 2 -10RuAl alloy. The white phase consists of ∼8.3Al-91.7Au, the gray phase of ∼21.4Al-77.1Au, and the dark-gray phase of ∼35.6Al-63.8Ru. More

Fig. 68 Backscattered electron image of 38Al-62Ir (at.%) alloy showing dark AlIr and a eutectic mixture of dark AlIr and light iridium-rich solid solution More