Damping capacity of sand cast magnesium alloy AZ91

被引：4
|
作者：
Erchov, S
Riehemann, W
Gabor, P
Eigenfeld, K
Podobed, O
机构：
[1] Tech Univ Freiberg, Foundry Inst, D-09596 Freiberg, Germany
[2] Tech Univ Clausthal, Inst Mat Sci & Engn, D-38678 Clausthal Zellerfeld, Germany
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2002年 / 18卷 / 02期
关键词：
D O I：
10.1179/026708301225000581
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurements of damping properties have been carried out on sand cast specimens of the most widely used commercial magnesium alloy AZ91. Damping properties of specimens in both as cast and heat treated (T4 and T6) conditions were determined by measurements of the logarithmic decrement of free bending beam vibration at various frequencies. The best damping properties were found in the as cast specimens. This is directly related to the microstructure, which consists of alpha magnesium, large inclusions of beta phase (Mg17Al12), as well as lamellar eutectoid Mg17Al12 precipitating as a result of low cooling rate. For homogenised and annealed specimens, the maxima of the hardness and of the damping capacity as a function of annealing time was found. The measurements of the logarithmic decrement can be explained using a model of Granato and Lucke.
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页码：198 / 200
页数：3
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