# Dynamic Viscosity and Transverse Ultrasonic Attenuation of Engineering Materials
## 3 Results and Discussion
### Attenuation Behavior of Non-Ferrous Metals and Alloys
** & **Material** & **Ca** & **Ca** & **v** & **v** & **v** & **Co** & **Cu** & **v** & **v** & **v** & **Co/Ca** & **v/h** & **Tididness** & **Videos** & **Notes** \\ \hline
**No** & **40 km** & **40 km** & **40 km** & **m/s** & **40 km** & **40 km** & **mm** & & & & & & & \\
**MHz** & **40 km** & **40 km** & **40 km** & **40 km** & **40 km** & **40 km** & & & & & & & \\ \hline N46 & Brass 280 & 0 & (7.97 \(\pm\) 2.9) & 4.28 & 1.25 \(\times 10^{-3}\) & 152 & 2.32 & 1.29 \(\times 10^{-2}\) & [19.07] & 10.34 & 5.26 & 177 & \\ N46 & Brass 280 & 0 & (3.91 \(\pm\) 2.9) & 4.3 & 1.33 \(\times 10^{-3}\) & 152 & 2.32 & 1.29 \(\times 10^{-2}\) & [18.29] & 9.87 & 52.6 & 177 & \\ N104 & Brass 360 & 27.0 & 1.21 \(\times 10^{-2}\) & 4.36 & 4.31 \(\times 10^{-3}\) & 36.5 & 810 \(\times 10^{-2}\) & 2.18 & 292 \(\times 10^{-3}\) & 1.35 & 0.68 & 49.3 & 109 & \\ N104 & Brass 360 & 27.0 & 1.21 \(\times 10^{-2}\) & 4.36 & 4.31 \(\times 10^{-3}\) & 0 & (8.99 \(\pm\) 2.5) & 2.18 & 7.11 \(\times 10^{-4}\) & [19.33] & 0.16 & 49.3 & 109 & \\ N58 & Brass 360 & 31.5 & 4.36 & 5.00 \(\times 10^{-3}\) & 62.1 & 3.35 \(\times 10^{-2}\) & 2.17 \(\times 10^{-4}\) & 1.97 & 0.98 & 31.7 & 97.5 & \\ N52 & C-Gr-Gr-2 & 56.7 & 4.03 \(\times 10^{-2}\) & 4.69 & 7.94 \(\times 10^{-2}\) & (5.28 \(\pm\) 7.2) & 2.40 & 2.30 \(\times 10^{-3}\) & [0.44] & 0.24 & 3.55 & 88.9 & \\ N63 & C-Gr-20 & 23.3 & 4.55 & 3.88 \(\times 10^{-3}\) & 41.4 & 2.44 & 2.43 \(\times 10^{-3}\) & 1.78 & 0.95 & 40.0 & 97.8 & \\ N64 & C-Gr-20 & 18.0 & 4.54 & 3.36 \(\times 10^{-3}\) & 12.1 & 1.13 \(\times 10^{-2}\) & 2.42 & 1.07 \(\times 10^{-3}\) & 0.64 & 3.44 & 51.0 & 110 & \\ N65 & C-Gr-20 & 24.2 & 8.91 \(\times 10^{-3}\) & 4.75 & 4.21 \(\times 10^{-3}\) & 91.3 & & 2.76 \(\times 10^{-3}\) & 3.77 & 1.89 & 35.9 & 110 & \\ N66 & Pure Mg & 6.6 & 5.81 & 1.80 \(\times 10^{-3}\) & 15.6 & 3.12 & 1.78 \(\times 10^{-3}\) & 2.37 & 1.27 & 16.00 & 40.5 & 99.5\% \\ N66 & Pure Mg & 4.9 & 5.8 & 1.01 \(\times 10^{-3}\) & 15.6 & 3.12 & 1.78 \(\times 10^{-3}\) & 3.20 & 1.72 & 16.00 & 40.5 & 99.5\% \\ N67 & Pure Mg & 5.3 & 5.81 & 1.14 \(\times 10^{-3}\) & 22.0 & 3.12 & 2.52 \(\times 10^{-3}\) & 4.12 & 2.21 & 76 & 40.5 & 99.5\% \\ N68 & Pure Mg & 4.4 & 5.8 & 9.85 \(\times 10^{-3}\) & 11.1 & 3.12 & 1.27 \(\times 10^{-3}\) & 2.55 & 1.37 & 70.60 & 40.5 & 99.5\% \\ N69 & C-Gr-20 & 4.1 & 5.8 & 8.71 \(\times 10^{-4}\) & 11.1 & 3.12 & 1.27 \(\times 10^{-3}\) & 2.71 & 1.46 & 70.710 & 40.5 & 99.6\% \\ N69 & Mg-2K1 & 2.0 & 5.75 & 4.93 \(\times 10^{-4}\) & 4.0 & 2.99 & 4.38 \(\times 10^{-4}\) & 2.02 & 1.05 & 10.06 & 91.4 & \\ N69 & Mg-2K1 & 3.0 & 5.76 & 6.52 \(\times 10^{-4}\) & 4.0 & 2.99 & 4.38 \(\times 10^{-4}\) & 1.33 & 6.09 & 150.0 & 91.4 & \\ N70 & Mg & 4200 & 6.4 & 2.06 \(\times 10^{-3}\) & 5.72 & 1.27 \(\times 10^{-3}\) & 301 & 2.97 & 3.85 \(\times 10^{-2}\) & 4.88 & 2.59 & 46.0 & 115 & No magnet \\ N70 & N120 & 59.0 & 2.90 \(\times 10^{-3}\) & 5.72 & 1.22 \(\times 10^{-3}\) & 301 & 2.97 & 3.85 \(\times 10^{-2}\) & 51.0 & 2.65 & 46.0 & 115 & No magnet \\ N70 & N120 & 48.0 & 3.55 \(\times 10^{-3}\) & 5.72 & 1.01 \(\times 10^{-3}\) & 140 & 3.05 & 1.85 \(\times 10^{-2}\) & 2.92 & 1.56 & 46.0 & 115 & \"1.2 \\ N70 & N120 & 48.0 & 3.25 \(\times 10^{-3}\) & 5.76 & 6.68 \(\times 10^{-3}\) & 140 & 3.05 & 1.56 \(\times 10^{-4}\) & 4.42 & 3.25 & 46.0 & 115 & \"2.3 \\ N72 & N200 & 20.4 & 5.77 & 4.33 \(\times 10^{-3}\) & 21.11 & 5.78 \(\times 10^{-3}\) & 3.08 & 2.38 \(\times 10^{-3}\) & 1.03 & 0.55 & 38.0 & 234 & \"4 \\ N72 & N200 & 18.3 & 5.77 & 3.57 \(\times 10^{-3}\) & 21.11 & 5.78 \(\times 10^{-3}\) & 3.08 & 2.38 \(\times 10^{-3}\) & 1.15 & 6.02 & 38.0 & 244 & 5 \\ N75 & Monet 400 & 34.0 & 5.47 & 6.81 \(\times 10^{-3}\) & 20.3 & 7.75 \(\times 10^{-3}\) & 2.77 \(\times 10^{-3}\) & 0.60 & 3.00 & 3.68 & 275 & \\ N85 & Monet 600 & 68.6 & 6.38 & 2.01 \(\times 10^{-3}\) & 19.9 & 3.76 & 1.92 \(\times 10^{-2}\) & 1.61 & 0.95 & 11.2 & 322 & \\ N106 & Monet 600 & 89.3 & 6.44 & 2.11 \(\times 10^{-3}\) & 174 & 3.76 & 2.40 \(\times 10^{-2}\) & 1.95 & 1.14 & 11.12 & 322 & \\ N77 & Monet 625 & 15.5 & 1.08 \(\times 10^{-3}\) & 5.83 & 3.3 Figure 7 shows three types of transverse attenuation spectra observed in Cu and its alloys; linear (blue curve, Test N63), Mason-McSkimin (red, N64), and frequency-squared (green, N62).