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http://dx.doi.org/10.12656/jksht.2013.26.4.185

Damping Capacity of Heat-Treated Mg-Nd Alloy  

Jun, Joong-Hwan (Advanced Fusion Process R&D Group, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Heat Treatment / v.26, no.4, 2013 , pp. 185-190 More about this Journal
Abstract
Influence of solution treatment (T4) and peak-aging (T6) on damping capacity was investigated in permanent-mold cast Mg-3%Nd alloy. In as-cast state, the microstructure was characterized by eutectic $Mg_{12}Nd$ intermetallic phase network in the intergranular region. T4 treatment resulted in a dissolution of the eutectic particles, but small amount of the particles still remained in the microstructure. After T6 treatment, nano-sized ${\beta}^{\prime}(Mg_{12}Nd)$ particles were precipitated within the matrix. T4 microstructure showed higher damping capacity than as-cast and T6 ones. In view of the microstructural features, this may well be associated with the dissolution of second-phase particles which play a role in pinning the dislocations acting as a damping source.
Keywords
Mg-Nd alloy; Solution treatment; Peak-aging; Damping capacity;
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