Damping properties of Mg–Ca binary alloys

Damping Properties of Homogenized and Cold-Rolled Mg–14.3Li–0.8Zn β-Phase Magnesium Alloy

“…Table 1 also lists the calculated H HTDB values for ashomogenized and cold-rolled LZ141 specimens and other Mg alloys. It shows that the H HTDB value for as-homogenized LZ141 alloy (H HTDB = 1.44 eV) is similar to those for coldrolled AZ80 alloy (H HTDB = 1.37 eV) 20) and as-cast Mg1Ca (mass%) alloy (H HTDB = 1.35 eV), 24) but is higher than that for as-annealed LZ100 alloy (H HTDB = 0.59 eV). 13) Weller et al 19) reported that the HTDB in TiAl and NiAl intermetallics can be assigned to the diffusion-assisted climb of dislocations, since the activation energy of TiAl intermetallics measured by high temperature damping experiments and by creep experiments are very similar.…”

Elastic and Damping Properties of AZ31 Magnesium Alloy Sheet Processed by High-Temperature Rolling

“…In general, the damping properties of magnesium are weakly related to the strain amplitude at the low strain amplitude, while it is strongly related to the strain amplitude at high strain amplitude. 13,15,16,19) The linear relationship in Fig. 5 can be roughly divided into two parts at around…”

“…[13][14][15][16][17][18][19] However, damping property of commercial magnesium alloys such as Mg-Al-Zn alloys is not so high compared with that of pure magnesium, 15,17) thus, application of magnesium alloy sheets for damping materials is still limited. 20) In general, elastic and damping properties of metals are recognized to be dependent on microstructural factors such as grain size, precipitates, texture and so on.…”

Effect of Cold-Rolling on Damping Characteristics of Multi-Component Al–12%Si Alloy Measured by Dynamic Mechanical Analyzer

“…From Table 3, it is seen that the hardness of the 70% cold-rolled Al12%Si specimen decreases significantly from 105.6 to 58.2 Hv after heating to 300°C during the DMA test. Table 2 The n value and activation energy H of the HTDB for pure Al, Al 12%Si alloy, soft solders, 28,36) magnesium alloys 26,33,37,38) and TiAl/NiAl intermetallics. 32) n H(eV) Internal Friction, Q Figure 8 shows the OM observation of the 70% cold-rolled Al12%Si alloy which has been conducted the first round DMA test.…”

“…Effect of Cold-Rolling on Damping Characteristics of Multi-Component Al12%Si Alloy Measured by Dynamic Mechanical Analyzermagnesium alloys 26,33,37,38) and TiAl/NiAl intermetallics, 32) etc. Weller et al 32,39,40) stated that the HTDB in TiAl alloys is associated with the diffusion-assisted climb of dislocations because the activation energies of TiAl alloys calculated from the high-temperature damping experiments and those from the creep experiments are comparable.…”