Microstructure and second-phase particles in low- and high-pressure die-cast magnesium alloy AM50

作者：Gertsman VY^*; Li J; Xu S; Thomson JP; Sahoo M

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2005, 36A(8): 1989-1997.

DOI：10.1007/s11661-005-0319-5

The microstructure and phase composition of low-pressure die-cast (LPDC) and high-pressure die-cast (HPDC) magnesium alloy AM50 were examined by transmission electron microscopy (TEM) techniques in combination with optical microscopy, scanning electron microscopy (SEM), and electron-probe microanalysis (EPMA). It has been established that the dimensions and morphology of the constituent phases (alpha-Mg solid solution, Mg17Al12, and Al8Mn5) depend on the processing parameters. The results obtained suggest that there is a ternary eutectic with the aforementioned three phases in the Mg-Al-Mn system. Phase transformations leading to the observed microstructures are discussed.

• 出版日期2005-8