Search Results for grain boundaries

Fig. 12.5 Because atoms at grain boundaries are in a higher energy state, the grain boundaries become anodic. More

Fig. 2.22 Grain boundaries in equilibrium. Source: Ref 2 More

Fig. 18.11 Precipitation of chromium carbide at grain boundaries More

Figure 3-44 Prior-austenite grain boundaries in four different martensitic steels revealed with different etchants. More

Figure 3-45 Prior-austenite grain boundaries in a martensitic low-carbon sheet steel revealed by etching with Marshall’s reagent, 15 s, 150×. (Courtesy of A. O. Benscoter, Bethlehem Steel Corp.) More

Fig. 9 Depletion of chromium from the austenite near grain boundaries due to chromium carbide precipitation. Source: Ref 14 More

Fig. 2 Nature of grain boundaries More

Fig. 16.5 Crack following prior austenitic grain boundaries in AISI 410 steel subjected to corrosion testing according to NACE TM 0177 standard. Courtesy of A. Zeemann, Tecmetal, Rio de Janeiro, Brazil. More

Fig. 2.27 Grain boundaries act as barriers to slip by dislocations. Source: Ref 2.1 More

Fig. 55 Creep cavities and creep wedges forming at grain boundaries More

Fig. 59 Intergranular oxidation of the surface along prior grain boundaries in a carburized steel. Original magnification: 1000×. Source: Ref 78 More

Fig. 1.2 Crystal structure of the grains and the nature of the grain boundaries More

Fig. 4.19 Pearlite nodules (dark areas) formed on prior-austenite grain boundaries, indicated by white lines. Slow-quenched 1095 steel. Nital etch. Original magnification: 600 × More

Fig. 8.11 Segregation of solute atoms to grain boundaries and resultant solute drag More

Fig. 6.9 Composition profiles across grain boundaries obtained by a dedicated scanning transmission electron microscope (DSTEM) in a 20Cr-25Ni-Nb stainless steel irradiated to 2 to 5 × 10 21 n/cm 2 in a steam-generated heavy water reactor (SGHWR) at 288 °C (550 °F). Data are compared More

Fig. 6.11 Compositional profiles across grain boundaries obtained by D-STEM from a low-strain, high-purity type 348 stainless steel swelling-tube specimen irradiated to 3.4 × 10 21 n/cm 2 at 288 °C (550 °F) in a BWR. Source: Ref 6.45 More

Fig. 4.17 Proeutectoid cementite (white network) formed at austenite grain boundaries in an Fe-1.22C alloy held at 780 °C (1435 °F) for 30 min. Dark patches are pearlite colonies and the remainder of the microstructure is martensite and retained austenite. Nital etch. Original magnification More

Fig. 8.4 Prior-austenite grain boundaries in the core of a carburized steel. (a) Etched and partially repolished, leaving remnants of intragranular structure. (b) Etched and repolished to remove all intragranular structure. Light micrographs; details of etching are given in the text. Source More

Fig. 8.28 Prior austenite grain boundaries in a quenched 0.5% Mo-B steel. (a) 200× and (b) 500×. Boiling alkaline sodium picrate etch followed by 10 seconds in 2% nital etch and 20 seconds in 4% picral etch More

Fig. 8.29 Prior austenite grain boundaries in a quenched and tempered MIL-S-23194 composition F-steel forging. Modified Winsteard’s etch. 500× More