【摘 要】
：
The microstructures of Mg-2Nd-4Zn-lZr alloy in the as-cast and after heat treatment were investigated.Several kinds of secondary phases were found and characterized by transmission electron microscopy
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &
论文部分内容阅读
The microstructures of Mg-2Nd-4Zn-lZr alloy in the as-cast and after heat treatment were investigated.Several kinds of secondary phases were found and characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD).In the as-cast alloy, the existing eutectic compounds are Mg-Nd-Zn ternary phases: T phases and W phases.After the heat treatment, with the temperature and time increasing, it was found that T phase almost dissolved into the c-Mg matrix, while a large amount of W phase remain in the matrix.On the other hand, with the time prolonged, the morphology of the phase changed from continuous network to the spherical shape along the grain boundary.The density of the W phases gradually decreased and finally coarsened and stabilized in the treatment process.
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