Search Results for twins

Fig. 30 Grains and deformation twins revealed by polarized light on an as-polished section of cast bismuth. 50× More

Fig. 46 Hafnium crystal bar showing twins caused by cold working. Attack polished, heat tinted at 480 °C (900 °F), and viewed under differential interference contrast illumination. 65×. (P.E. Danielson) More

Fig. 4 Twinning in high-purity titanium. The twins are the needlelike bands in the grains. In some instances, the twins extend entirely across a grain. Etchant: 10% HF, 5% HNO 3 . Original magnification: 250× More

Fig. 17 Stacking faults (bands of closely spaced lines) and mechanical twins (the five dark, narrow bands) in 18Cr-8Ni stainless steel, deformed 5% at room temperature. Thin-foil electron micrograph. Original magnification 10,000× More

Fig. 70 Centered dark-field micrograph of deformation twins imaged with 1 1 1 twin reflection. Thin foil TEM specimen More

Fig. 29 Mechanical twins likely nucleated by cleavage crack propagation in a Fe-Cr-Mo alloy. Specimen taken from high strain rate, expanded tubing. Nomarski contrast illumination. Source: Ref 44 More

Fig. 30 Mechanical twins likely nucleated by cleavage crack propagation in an Fe-Cr-Mo alloy. Specimen taken from high-strain-rate, expanded tubing. Nomarski contrast illumination. Source: Ref 20 More

Fig. 23 Equiaxed alpha grains containing annealing twins in annealed (at 750°C, or 1380 °F) wrought aluminum brass (Cu-22%Zn-2%Al) revealed by using potassium-dichromate etch, a grain-contrast etchant that responds well to polarized light More

Fig. 122 Deformation twins (some indicated by arrows) observed on the surface of (a) an otherwise intact steel T-beam removed from the fire zone and (b) the cold side of vessel V-8. Etched with 2% nital More

Fig. 44 Austenitic grain structure of 316 stainless steel showing annealing twins with different etchants. (a) HCl-HNO 3 -H 2 O. (b) Tint etched with Beraha’s solution. Courtesy of George F. Vander Voort, Vander Voort Consulting More

Fig. 5 Twinning planes in titanium. Although most twinning occurs along the (1 1 02) plane, deformation at room temperature also takes place along other planes. More

Fig. 20 Twin tank system for electroless nickel plating. Tanks are used alternately. While one tank is being used to plate, the second is being passivated. Cylindrical tank is used to store 30% nitric acid for passivation. More

Fig. 8 Twin pinch roll drive system More

Fig. 9 Twin tractor drive system More

Fig. 11 Typical arrangement of a twin-roll horizontal caster used in the aluminum industry. Source: Ref 5 More

Fig. 13 Twin-belt slab caster. Courtesy of Light Metal Age. Source: Ref 6 More

Fig. 3 Cutaway drawing of a twin-channel induction melting furnace More

Fig. 7 Typical tundish design for a twin-strand slab caster. Source: Ref 4 More

Fig. 7 Schematic illustrating the twin plane re-entrant edge mechanism. (a) Crystal with a single twin. (b) Closure of twins due to ridge formation. (c) Crystal with two twins. (d) Creation of extra re-entrant corners I and II. (e) Propagation of crystal due to re-entrant corners. Source: Ref More

Fig. 28 Diagram of sequences (a) through (c) involved in the formation of a twin/tilt plane for graphite growing in the [1010] direction. Source: Ref 40 More