Microstructures and Mechanical Properties of Heat-Resistant High-Pressure Die-Cast Mg-4Al-6RE-0.3Mn (RE= La, Ce, Pr, Nd, Wt.%) Alloys

Zhe Leng; Jing Huai Zhang; Mi Lin Zhang; Jian Meng; Rui Zhi Wu

doi:10.4028/www.scientific.net/MSF.686.265

Paper Titles

Microstructure and Mechanical Properties of Quasicrystal Reinforced Magnesium Matrix Composites
p.242

Microstructure and Solidification Behavior of Permanent-Mould-Cast Mg-9Li-3Al-XSr Magnesium Alloy
p.247

Microstructures and Mechanical Properties of AJ62 Magnesium Alloy with Y and Nd Elements
p.253

Microstructures and Mechanical Properties of As-Cast and Extruded Mg-2wt.%Zn Alloy Containing Dilute Content of Misch Metal
p.260

Microstructures and Mechanical Properties of Heat-Resistant High-Pressure Die-Cast Mg-4Al-6RE-0.3Mn (RE= La, Ce, Pr, Nd, Wt.%) Alloys
p.265

Observation of Microstructural Refinement in Mg-3Sn-2Ca Magnesium Alloy Containing Minor Sr
p.271

Effect of Nd Addition on a Mg-Zn-Bi Magnesium Alloy
p.276

Photocatalystic Cathodic Protection of TiO₂ Coating on AZ31 Magnesium Alloy
p.280

Preparation of Mg-Cu-Y and Mg-Ni-Gd Based Amorphous Brazing Material
p.287

HomeMaterials Science ForumMaterials Science Forum Vol. 686Microstructures and Mechanical Properties of...

Microstructures and Mechanical Properties of Heat-Resistant High-Pressure Die-Cast Mg-4Al-6RE-0.3Mn (RE= La, Ce, Pr, Nd, Wt.%) Alloys

Abstract:

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.