Grooved groove angle

When 6, die groove angle is small, die widdr between die two maxima, W, on eidrer side of a surface groove is obtained from die values... 

Figure 1.158 Concentration profiles of Rhodamine B imaged on various planes of the four-grooved channels for different groove angles at a constant groove depth of 50 pm [156] (by courtesy of RSC).

Draw schematically and explain the variation in groove angle formed at a symmetric tilt grain boundary with tilt angle 9. As the temperature increases, how does the relationship between and 9 change approximately Assume invariable surface energy. 

Figure 11.41 The critical ratio of the grain radius to the film thickness (R/d) above which grain boundary grooving will lead to film rupture, versus the equilibrium groove angle 6. The parameters R, a, and 0 are defined in Fig. 11.40. (From Ref. 60.)...

Groove angle or included angle of countersink for plug welds... 

Fig. 2 shows the variation of load with eccentricity ratio for groove angles of 0°, 47°, 60° amd 360°. The loci of the journal centres over the same load range are plotted in fig. 3. Fig. 2 indicates good agreement and the loci of fig. 3 also agree at eccentricity ratios of 0.6 and less. At greater eccentricity there is some... 

The values of y sv for copper for different surface orientations (Table 4.1) were determined from measurements of grain-boundary groove angles in Reference [4],... 

A. Smaller diameter sheaves have less groove angle than larger diameter grooves. 

Base-metal thickness, t, in. Root opening Groove angle, Weld-bead width... 

Material thicker than 3 mm will benefit in joint strength if multiple weld runs are made on each side, ie 6 mm—3 runs, on each side 12 mm—6 runs on each side. The same applies to double V butts, although to obtain optimum strength from single V butts three weld runs should be made on 3 mm thick material and five on 10 mm thick. In all cases the prepared welding groove angle should be about 70 with a root gap of about 0.6 mm. Fig. 3 illustrates the various weld types and runs. 

R. Coble (M.LT.) Have you looked at the groove angles as a function of temperature Answer No. 

Experiments on the equiUbrium shape of small crystallites and on the groove angle at grain boundaries indicate an orientation dependence of the surface free energy. The value the surface free energy varies by several percent for different surface orientations at high temperature. This anisotropy is e.g. responsible for the faceted shape of the crystallites shown in Fig. 4. 

Figure 5.34 presents various situations, from the case of a (amorphous) second phase which wets extremely well (Figs. 5.34f and 5.33c) to its absolute opposite (Fig. 5.34a), the complete separation of the second phase into the triple-grain junction. While the surface tension is accessible from wetting experiments (see Eq. (5.76)), the grain boundary tension can be determined by measuring the grooving angle of the grain boimdary trench (see Fig. 5.35). The relevant relationship follows from...

Pig. 5.35 The grooving angle of the grain boundary is a function of the grain boundary inter cial tension and of... 

The Washburn model is consistent with recent studies by Rye and co-workers of liquid flow in V-shaped grooves [49] however, the experiments are unable to distinguish between this and more sophisticated models. Equation XIII-8 is also used in studies of wicking. Wicking is the measurement of the rate of capillary rise in a porous medium to determine the average pore radius [50], surface area [51] or contact angle [52]. 

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