Microstructures and Mechanical Properties of Heat-Resistant High-Pressure Die-Cast Mg-4Al-6RE-0.3Mn (RE= La, Ce, Pr, Nd, Wt.%) Alloys
| Periodical | Materials Science Forum (Volume 686) |
|---|---|
| Main Theme | Advanced Structural Materials |
| Edited by | Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou |
| Pages | 265-270 |
| DOI | 10.4028/www.scientific.net/MSF.686.265 |
| Citation | Zhe Leng et al., 2011, Materials Science Forum, 686, 265 |
| Online since | June, 2011 |
| Authors | Zhe Leng, Jing Huai Zhang, Mi Lin Zhang, Jian Meng, Rui Zhi Wu |
| Keywords | Heat Resistant, Mechanical Property, Mg Alloy, Microstructure |
| Price | US$ 28,- |
Mg-4Al-6RE-0.3Mn (RE=La, Ce, Pr, Nd, wt.%) magnesium alloys were prepared successfully by the high-pressure die-casting technique. The microstructures and tensile properties in the temperature range from room temperature to 200 °C were investigated. It was confirmed that the Mg-Al-RE-based alloys exhibited an outstanding die-cast character. The cross-section of test bar could be divided into the fine skin region and the relatively coarse interior region by a narrow band with fine structure. Two binary Al-RE (RE=La, Ce, Pr, Nd) phases with the former being the dominant one, Al11RE3 and Al2RE, occupied large grain boundary area. All the four alloys exhibited excellent tensile properties until 200 °C, which were mainly attributed to the fine grain size and the strengthening phase Al11RE3 with high volume fraction, fine acicular/lamellar morphology, "orderly stack” distribution and good thermal stability. The results of this work provided a basis for further investigation of the new heat-resistant high-pressure die-cast magnesium alloys designed to serve at temperature up to 200 °C.
