Effects of precipitation processes on damping and elastic modulus of WE 43 magnesium alloy

LAMBRI, OSVALDO; RIEHEMANN, WERNER; SALVATIERRA, LUCAS; GARCÍA, JOSÉ ÁNGEL

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Elsevier B. V.

Lugar: Amsterdam, NH; Año: 2004 vol. 373 p. 146 - 157

0921-5093

Mechanical spectroscopy, electrical resistivity and X-ray diffraction measurements were performed on commercial WE 43 magnesium alloy with different thermal histories in order to determine the precipitation processes which appears within the temperature range between room temperature and 823 K. It has been found out that the precipitation process at temperatures of about 650 K promotes two stages of precipitations. The first occurring at earlier times produces an increase of the modulus and the later one leading to softening by growing of precipitates and a decrease of solid solute concentration in the matrix. The damping spectrum in WE 43 magnesium alloy shows three grain boundary damping peaks. The characteristic grain boundary peak of magnesium at 450 K, a grain boundary peak related to the solute atoms at 490 K and a grain boundary peak related to precipitates at grain boundaries at 520 K.