[Kovove materialy - Metallic materials]
    Mon - January 25, 2021 - 13:59 No. of hits : 1227817 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 53 (2015), Issue 4

Internal friction associated with the microstructural changes in an AZ91 magnesium alloy
TROJANOVA, Z., PALČEK, P., SOVIAROVÁ, A., CHALUPOVÁ, M., DASH, K., KNAPEK, M.
vol. 53 (2015), no. 4, pp. 259 - 265

Abstract
Temperature dependence of logarithmic decrement was measured in Mg-9Al-1Zn alloy. The developed internal friction peak was found while heating in the vicinity of 320 °C. Position and height of this peak in the temperature scale depends on the heating rate. Simultaneously microstructural observations were performed in the selected points of the temperature scale. SEM revealed discontinuous precipitates at lower temperature which converted at higher temperatures into continuous precipitates. Possible internal friction mechanism is discussed.

Key words
magnesium alloy, internal friction, precipitation, SEM

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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